Class: GraphQL::Schema

Inherits:
Object
  • Object
show all
Extended by:
Forwardable, FindInheritedValue, Member::AcceptsDefinition, Member::HasAstNode
Includes:
Define::InstanceDefinable
Defined in:
lib/graphql/schema.rb,
lib/graphql/schema/enum.rb,
lib/graphql/schema/list.rb,
lib/graphql/schema/field.rb,
lib/graphql/schema/union.rb,
lib/graphql/schema/finder.rb,
lib/graphql/schema/loader.rb,
lib/graphql/schema/member.rb,
lib/graphql/schema/object.rb,
lib/graphql/schema/scalar.rb,
lib/graphql/schema/warden.rb,
lib/graphql/schema/printer.rb,
lib/graphql/schema/timeout.rb,
lib/graphql/schema/wrapper.rb,
lib/graphql/schema/argument.rb,
lib/graphql/schema/mutation.rb,
lib/graphql/schema/non_null.rb,
lib/graphql/schema/resolver.rb,
lib/graphql/schema/directive.rb,
lib/graphql/schema/interface.rb,
lib/graphql/schema/null_mask.rb,
lib/graphql/schema/traversal.rb,
lib/graphql/schema/enum_value.rb,
lib/graphql/schema/validation.rb,
lib/graphql/schema/input_object.rb,
lib/graphql/schema/subscription.rb,
lib/graphql/schema/member/scoped.rb,
lib/graphql/schema/built_in_types.rb,
lib/graphql/schema/directive/skip.rb,
lib/graphql/schema/possible_types.rb,
lib/graphql/schema/base_64_encoder.rb,
lib/graphql/schema/field_extension.rb,
lib/graphql/schema/late_bound_type.rb,
lib/graphql/schema/member/has_path.rb,
lib/graphql/schema/type_expression.rb,
lib/graphql/schema/type_membership.rb,
lib/graphql/schema/middleware_chain.rb,
lib/graphql/schema/directive/feature.rb,
lib/graphql/schema/directive/include.rb,
lib/graphql/schema/member/build_type.rb,
lib/graphql/schema/member/has_fields.rb,
lib/graphql/schema/rescue_middleware.rb,
lib/graphql/schema/default_type_error.rb,
lib/graphql/schema/invalid_type_error.rb,
lib/graphql/schema/timeout_middleware.rb,
lib/graphql/schema/unique_within_type.rb,
lib/graphql/schema/catchall_middleware.rb,
lib/graphql/schema/default_parse_error.rb,
lib/graphql/schema/directive/transform.rb,
lib/graphql/schema/member/has_ast_node.rb,
lib/graphql/schema/directive/deprecated.rb,
lib/graphql/schema/find_inherited_value.rb,
lib/graphql/schema/introspection_system.rb,
lib/graphql/schema/member/has_arguments.rb,
lib/graphql/schema/build_from_definition.rb,
lib/graphql/schema/field/scope_extension.rb,
lib/graphql/schema/member/instrumentation.rb,
lib/graphql/schema/member/relay_shortcuts.rb,
lib/graphql/schema/member/validates_input.rb,
lib/graphql/schema/relay_classic_mutation.rb,
lib/graphql/schema/member/base_dsl_methods.rb,
lib/graphql/schema/member/accepts_definition.rb,
lib/graphql/schema/member/graphql_type_names.rb,
lib/graphql/schema/resolver/has_payload_type.rb,
lib/graphql/schema/field/connection_extension.rb,
lib/graphql/schema/member/type_system_helpers.rb,
lib/graphql/schema/member/cached_graphql_definition.rb,
lib/graphql/schema/build_from_definition/resolve_map.rb,
lib/graphql/schema/build_from_definition/resolve_map/default_resolve.rb

Overview

Extend this class to define GraphQL enums in your schema.

By default, GraphQL enum values are translated into Ruby strings. You can provide a custom value with the value: keyword.

Examples:

# equivalent to
# enum PizzaTopping {
#   MUSHROOMS
#   ONIONS
#   PEPPERS
# }
class PizzaTopping < GraphQL::Enum
  value :MUSHROOMS
  value :ONIONS
  value :PEPPERS
end

Defined Under Namespace

Modules: Base64Encoder, BuildFromDefinition, CatchallMiddleware, DefaultParseError, DefaultTypeError, FindInheritedValue, Interface, Loader, NullMask, ResolveTypeWithType, TypeExpression, UniqueWithinType Classes: Argument, CyclicalDefinitionError, Directive, Enum, EnumValue, Field, FieldExtension, Finder, InputObject, IntrospectionSystem, InvalidDocumentError, InvalidTypeError, LateBoundType, List, Member, MiddlewareChain, Mutation, NonNull, Object, PossibleTypes, Printer, RelayClassicMutation, RescueMiddleware, Resolver, Scalar, Subscription, Timeout, TimeoutMiddleware, Traversal, TypeMembership, Union, UnresolvedLateBoundTypeError, Validation, Warden, Wrapper

Constant Summary collapse

DYNAMIC_FIELDS = 
["__type", "__typename", "__schema"].freeze
BUILT_IN_TYPES = 
{
  "Int" => GraphQL::Types::Int,
  "String" => GraphQL::Types::String,
  "Float" => GraphQL::Types::Float,
  "Boolean" => GraphQL::Types::Boolean,
  "ID" => GraphQL::Types::ID,
}

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Define::InstanceDefinable

#metadata, #redefine

Constructor Details

#initialize ⇒ Schema

Returns a new instance of Schema.



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# File 'lib/graphql/schema.rb', line 198

def initialize
  @tracers = []
  @definition_error = nil
  @orphan_types = []
  @directives = {}
  self.class.default_directives.each do |name, dir|
    @directives[name] = dir.graphql_definition
  end
  @static_validator = GraphQL::StaticValidation::Validator.new(schema: self)
  @middleware = MiddlewareChain.new(final_step: GraphQL::Execution::Execute::FieldResolveStep)
  @query_analyzers = []
  @multiplex_analyzers = []
  @resolve_type_proc = nil
  @object_from_id_proc = nil
  @id_from_object_proc = nil
  @type_error_proc = DefaultTypeError
  @parse_error_proc = DefaultParseError
  @instrumenters = Hash.new { |h, k| h[k] = [] }
  @lazy_methods = GraphQL::Execution::Lazy::LazyMethodMap.new
  @lazy_methods.set(GraphQL::Execution::Lazy, :value)
  @cursor_encoder = Base64Encoder
  # Default to the built-in execution strategy:
  @analysis_engine = GraphQL::Analysis
  @query_execution_strategy = self.class.default_execution_strategy
  @mutation_execution_strategy = self.class.default_execution_strategy
  @subscription_execution_strategy = self.class.default_execution_strategy
  @default_mask = GraphQL::Schema::NullMask
  @rebuilding_artifacts = false
  @context_class = GraphQL::Query::Context
  @introspection_namespace = nil
  @introspection_system = nil
  @interpreter = false
  @error_bubbling = false
  @disable_introspection_entry_points = false
  @disable_schema_introspection_entry_point = false
  @disable_type_introspection_entry_point = false
end

Class Attribute Details

.analysis_engine ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1182

def analysis_engine
  @analysis_engine || find_inherited_value(:analysis_engine, GraphQL::Analysis)
end

.connections ⇒ GraphQL::Pagination::Connections

Returns if installed.

Returns:



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# File 'lib/graphql/schema.rb', line 946

def connections
  @connections
end

.default_execution_strategy ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1275

def default_execution_strategy
  if superclass <= GraphQL::Schema
    superclass.default_execution_strategy
  else
    @default_execution_strategy ||= GraphQL::Execution::Execute
  end
end

.error_bubbling(new_error_bubbling = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1200

def error_bubbling(new_error_bubbling = nil)
  if !new_error_bubbling.nil?
    @error_bubbling = new_error_bubbling
  else
    @error_bubbling.nil? ? find_inherited_value(:error_bubbling) : @error_bubbling
  end
end

.error_handler ⇒ GraphQL::Execution::Errors, Class<GraphQL::Execution::Errors::NullErrorHandler>

Returns:



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# File 'lib/graphql/schema.rb', line 1416

def error_handler
  @error_handler ||= GraphQL::Execution::Errors::NullErrorHandler
end

.interpreter=(value) ⇒ Object (writeonly)

Sets the attribute interpreter

Parameters:

  • value —

    the value to set the attribute interpreter to.



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# File 'lib/graphql/schema.rb', line 1198

def interpreter=(value)
  @interpreter = value
end

.max_complexity(max_complexity = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1170

def max_complexity(max_complexity = nil)
  if max_complexity
    @max_complexity = max_complexity
  elsif defined?(@max_complexity)
    @max_complexity
  else
    find_inherited_value(:max_complexity)
  end
end

.max_depth(new_max_depth = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1212

def max_depth(new_max_depth = nil)
  if new_max_depth
    @max_depth = new_max_depth
  elsif defined?(@max_depth)
    @max_depth
  else
    find_inherited_value(:max_depth)
  end
end

.subscriptions ⇒ GraphQL::Subscriptions

Returns:



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# File 'lib/graphql/schema.rb', line 798

def subscriptions
  @subscriptions
end

Instance Attribute Details

#analysis_engine ⇒ Object

Returns the value of attribute analysis_engine.



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# File 'lib/graphql/schema.rb', line 131

def analysis_engine
  @analysis_engine
end

#ast_node ⇒ Object

Returns the value of attribute ast_node.



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# File 'lib/graphql/schema.rb', line 131

def ast_node
  @ast_node
end

#connections ⇒ Object

Returns the value of attribute connections.



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# File 'lib/graphql/schema.rb', line 779

def connections
  @connections
end

#context_class ⇒ Class

Returns Instantiated for each query.

Returns:

  • (Class) —

    Instantiated for each query

See Also:

  • The parent class of these classes


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# File 'lib/graphql/schema.rb', line 159

def context_class
  @context_class
end

#cursor_encoder ⇒ Object

Returns the value of attribute cursor_encoder.



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# File 'lib/graphql/schema.rb', line 131

def cursor_encoder
  @cursor_encoder
end

#default_mask ⇒ <#call(member, ctx)>

Returns A callable for filtering members of the schema.

Returns:

  • (<#call(member, ctx)>) —

    A callable for filtering members of the schema

See Also:

  • for query-specific filters with `except:`


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# File 'lib/graphql/schema.rb', line 155

def default_mask
  @default_mask
end

#default_max_page_size ⇒ Object

Returns the value of attribute default_max_page_size.



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# File 'lib/graphql/schema.rb', line 131

def default_max_page_size
  @default_max_page_size
end

#directives ⇒ Object

Returns the value of attribute directives.



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# File 'lib/graphql/schema.rb', line 131

def directives
  @directives
end

#disable_introspection_entry_points ⇒ Object

[Boolean] True if this object disables the introspection entry point fields



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# File 'lib/graphql/schema.rb', line 162

def disable_introspection_entry_points
  @disable_introspection_entry_points
end

#disable_schema_introspection_entry_point ⇒ Object

[Boolean] True if this object disables the __schema introspection entry point field



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# File 'lib/graphql/schema.rb', line 169

def disable_schema_introspection_entry_point
  @disable_schema_introspection_entry_point
end

#disable_type_introspection_entry_point ⇒ Object

[Boolean] True if this object disables the __type introspection entry point field



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# File 'lib/graphql/schema.rb', line 176

def disable_type_introspection_entry_point
  @disable_type_introspection_entry_point
end

#error_bubbling ⇒ Object

[Boolean] True if this object bubbles validation errors up from a field into its parent InputObject, if there is one.



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# File 'lib/graphql/schema.rb', line 144

def error_bubbling
  @error_bubbling
end

#id_from_object_proc ⇒ Object (readonly)

Returns the value of attribute id_from_object_proc.



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# File 'lib/graphql/schema.rb', line 196

def id_from_object_proc
  @id_from_object_proc
end

#instrumenters ⇒ Object

Returns the value of attribute instrumenters.



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# File 'lib/graphql/schema.rb', line 131

def instrumenters
  @instrumenters
end

#interpreter=(value) ⇒ Object (writeonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/graphql/schema.rb', line 242

def interpreter=(value)
  @interpreter = value
end

#introspection_namespace ⇒ Object

Returns the value of attribute introspection_namespace.



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# File 'lib/graphql/schema.rb', line 131

def introspection_namespace
  @introspection_namespace
end

#lazy_methods ⇒ Object

Returns the value of attribute lazy_methods.



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# File 'lib/graphql/schema.rb', line 131

def lazy_methods
  @lazy_methods
end

#max_complexity ⇒ Object

Returns the value of attribute max_complexity.



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# File 'lib/graphql/schema.rb', line 131

def max_complexity
  @max_complexity
end

#max_depth ⇒ Object

Returns the value of attribute max_depth.



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# File 'lib/graphql/schema.rb', line 131

def max_depth
  @max_depth
end

#middleware ⇒ MiddlewareChain

Returns MiddlewareChain which is applied to fields during execution.

Returns:

  • (MiddlewareChain) —

    MiddlewareChain which is applied to fields during execution



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# File 'lib/graphql/schema.rb', line 151

def middleware
  @middleware
end

#multiplex_analyzers ⇒ Object

Returns the value of attribute multiplex_analyzers.



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# File 'lib/graphql/schema.rb', line 131

def multiplex_analyzers
  @multiplex_analyzers
end

#mutation ⇒ Object

Returns the value of attribute mutation.



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# File 'lib/graphql/schema.rb', line 131

def mutation
  @mutation
end

#mutation_execution_strategy ⇒ Object

Returns the value of attribute mutation_execution_strategy.



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# File 'lib/graphql/schema.rb', line 131

def mutation_execution_strategy
  @mutation_execution_strategy
end

#object_from_id_proc ⇒ Object (readonly)

Returns the value of attribute object_from_id_proc.



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# File 'lib/graphql/schema.rb', line 196

def object_from_id_proc
  @object_from_id_proc
end

#orphan_types ⇒ Object

Returns the value of attribute orphan_types.



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# File 'lib/graphql/schema.rb', line 131

def orphan_types
  @orphan_types
end

#query ⇒ Object

Returns the value of attribute query.



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# File 'lib/graphql/schema.rb', line 131

def query
  @query
end

#query_analyzers ⇒ Object

Returns the value of attribute query_analyzers.



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# File 'lib/graphql/schema.rb', line 131

def query_analyzers
  @query_analyzers
end

#query_execution_strategy ⇒ Object

Returns the value of attribute query_execution_strategy.



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# File 'lib/graphql/schema.rb', line 131

def query_execution_strategy
  @query_execution_strategy
end

#raise_definition_error ⇒ Object

Returns the value of attribute raise_definition_error.



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# File 'lib/graphql/schema.rb', line 131

def raise_definition_error
  @raise_definition_error
end

#resolve_type_proc ⇒ Object (readonly)

Returns the value of attribute resolve_type_proc.



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# File 'lib/graphql/schema.rb', line 196

def resolve_type_proc
  @resolve_type_proc
end

#static_validator ⇒ Object (readonly)

Returns the value of attribute static_validator.



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# File 'lib/graphql/schema.rb', line 196

def static_validator
  @static_validator
end

#subscription ⇒ Object

Returns the value of attribute subscription.



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# File 'lib/graphql/schema.rb', line 131

def subscription
  @subscription
end

#subscription_execution_strategy ⇒ Object

Returns the value of attribute subscription_execution_strategy.



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# File 'lib/graphql/schema.rb', line 131

def subscription_execution_strategy
  @subscription_execution_strategy
end

#subscriptions ⇒ GraphQL::Subscriptions

Single, long-lived instance of the provided subscriptions class, if there is one.

Returns:



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# File 'lib/graphql/schema.rb', line 148

def subscriptions
  @subscriptions
end

#tracers ⇒ Array<#trace(key, data)> (readonly)

Returns Tracers applied to every query.

Returns:

  • (Array<#trace(key, data)>) —

    Tracers applied to every query

See Also:

  • for query-specific tracers


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# File 'lib/graphql/schema.rb', line 192

def tracers
  @tracers
end

Class Method Details

.accessible?(member, ctx) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 1349

def accessible?(member, ctx)
  member.type_class.accessible?(ctx)
end

.after_lazy(value) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Call the given block at the right time, either: - Right away, if value is not registered with lazy_resolve - After resolving value, if it’s registered with lazy_resolve (eg, Promise)



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# File 'lib/graphql/schema.rb', line 1555

def after_lazy(value)
  if lazy?(value)
    GraphQL::Execution::Lazy.new do
      result = sync_lazy(value)
      # The returned result might also be lazy, so check it, too
      after_lazy(result) do |final_result|
        yield(final_result) if block_given?
      end
    end
  else
    yield(value) if block_given?
  end
end

.as_json(only: nil, except: nil, context: {}) ⇒ Hash

Return the Hash response of Introspection::INTROSPECTION_QUERY.

Parameters:

  • context (Hash) (defaults to: {})
  • only (<#call(member, ctx)>) (defaults to: nil)
  • except (<#call(member, ctx)>) (defaults to: nil)

Returns:

  • (Hash) —

    GraphQL result



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# File 'lib/graphql/schema.rb', line 812

def as_json(only: nil, except: nil, context: {})
  execute(Introspection::INTROSPECTION_QUERY, only: only, except: except, context: context).to_h
end

.context_class(new_context_class = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1283

def context_class(new_context_class = nil)
  if new_context_class
    @context_class = new_context_class
  else
    @context_class || find_inherited_value(:context_class, GraphQL::Query::Context)
  end
end

.cursor_encoder(new_encoder = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1129

def cursor_encoder(new_encoder = nil)
  if new_encoder
    @cursor_encoder = new_encoder
  end
  @cursor_encoder || find_inherited_value(:cursor_encoder, Base64Encoder)
end

.default_directives ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1451

def default_directives
  {
    "include" => GraphQL::Schema::Directive::Include,
    "skip" => GraphQL::Schema::Directive::Skip,
    "deprecated" => GraphQL::Schema::Directive::Deprecated,
  }
end

.default_filter ⇒ Object 



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# File 'lib/graphql/schema.rb', line 843

def default_filter
  GraphQL::Filter.new(except: default_mask)
end

.default_mask(new_mask = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 847

def default_mask(new_mask = nil)
  if new_mask
    @own_default_mask = new_mask
  else
    @own_default_mask || find_inherited_value(:default_mask, Schema::NullMask)
  end
end

.default_max_page_size(new_default_max_page_size = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1136

def default_max_page_size(new_default_max_page_size = nil)
  if new_default_max_page_size
    @default_max_page_size = new_default_max_page_size
  else
    @default_max_page_size || find_inherited_value(:default_max_page_size)
  end
end

.directive(new_directive) ⇒ Object

Attach a single directive to this schema

Parameters:

  • new_directive (Class) 


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# File 'lib/graphql/schema.rb', line 1446

def directive(new_directive)
  add_type_and_traverse(new_directive, root: false)
  own_directives[new_directive.graphql_name] = new_directive
end

.directives(new_directives = nil) ⇒ Object

Add several directives at once

Parameters:

  • new_directives (Class) (defaults to: nil) 


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# File 'lib/graphql/schema.rb', line 1436

def directives(new_directives = nil)
  if new_directives
    new_directives.each { |d| directive(d) }
  end

  find_inherited_value(:directives, default_directives).merge(own_directives)
end

.disable_introspection_entry_points ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1222

def disable_introspection_entry_points
  @disable_introspection_entry_points = true
  # TODO: this clears the cache made in `def types`. But this is not a great solution.
  @introspection_system = nil
end

.disable_introspection_entry_points? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 1240

def disable_introspection_entry_points?
  if instance_variable_defined?(:@disable_introspection_entry_points)
    @disable_introspection_entry_points
  else
    find_inherited_value(:disable_introspection_entry_points?, false)
  end
end

.disable_schema_introspection_entry_point ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1228

def disable_schema_introspection_entry_point
  @disable_schema_introspection_entry_point = true
  # TODO: this clears the cache made in `def types`. But this is not a great solution.
  @introspection_system = nil
end

.disable_schema_introspection_entry_point? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 1248

def disable_schema_introspection_entry_point?
  if instance_variable_defined?(:@disable_schema_introspection_entry_point)
    @disable_schema_introspection_entry_point
  else
    find_inherited_value(:disable_schema_introspection_entry_point?, false)
  end
end

.disable_type_introspection_entry_point ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1234

def disable_type_introspection_entry_point
  @disable_type_introspection_entry_point = true
  # TODO: this clears the cache made in `def types`. But this is not a great solution.
  @introspection_system = nil
end

.disable_type_introspection_entry_point? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 1256

def disable_type_introspection_entry_point?
  if instance_variable_defined?(:@disable_type_introspection_entry_point)
    @disable_type_introspection_entry_point
  else
    find_inherited_value(:disable_type_introspection_entry_point?, false)
  end
end

.execute(query_str = nil, **kwargs) ⇒ Hash

Execute a query on itself.

Returns:

  • (Hash) —

    query result, ready to be serialized as JSON

See Also:

  • for arguments.


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# File 'lib/graphql/schema.rb', line 1498

def execute(query_str = nil, **kwargs)
  if query_str
    kwargs[:query] = query_str
  end
  # Some of the query context _should_ be passed to the multiplex, too
  multiplex_context = if (ctx = kwargs[:context])
    {
      backtrace: ctx[:backtrace],
      tracers: ctx[:tracers],
    }
  else
    {}
  end
  # Since we're running one query, don't run a multiplex-level complexity analyzer
  all_results = multiplex([kwargs], max_complexity: nil, context: multiplex_context)
  all_results[0]
end

.find(path) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 831

def find(path)
  if !@finder
    @find_cache = {}
    @finder ||= GraphQL::Schema::Finder.new(self)
  end
  @find_cache[path] ||= @finder.find(path)
end

.from_definition(definition_or_path, default_resolve: BuildFromDefinition::DefaultResolve, interpreter: true, parser: BuildFromDefinition::DefaultParser, using: {}) ⇒ Class

Create schema from an IDL schema or file containing an IDL definition.

Parameters:

  • definition_or_path (String) —

    A schema definition string, or a path to a file containing the definition

  • default_resolve (<#call(type, field, obj, args, ctx)>) (defaults to: BuildFromDefinition::DefaultResolve) —

    A callable for handling field resolution

  • parser (Object) (defaults to: BuildFromDefinition::DefaultParser) —

    An object for handling definition string parsing (must respond to parse)

  • using (Hash) (defaults to: {}) —

    Plugins to attach to the created schema with use(key, value)

  • interpreter (Boolean) (defaults to: true) —

    If false, the legacy Execution::Execute runtime will be used

Returns:

  • (Class) —

    the schema described by document



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# File 'lib/graphql/schema.rb', line 718

def self.from_definition(definition_or_path, default_resolve: BuildFromDefinition::DefaultResolve, interpreter: true, parser: BuildFromDefinition::DefaultParser, using: {})
  # If the file ends in `.graphql`, treat it like a filepath
  definition = if definition_or_path.end_with?(".graphql")
    File.read(definition_or_path)
  else
    definition_or_path
  end
  GraphQL::Schema::BuildFromDefinition.from_definition(definition, default_resolve: default_resolve, parser: parser, using: using, interpreter: interpreter)
end

.from_introspection(introspection_result) ⇒ GraphQL::Schema

Create schema with the result of an introspection query.

Parameters:

Returns:



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# File 'lib/graphql/schema.rb', line 707

def self.from_introspection(introspection_result)
  GraphQL::Schema::Loader.load(introspection_result)
end

.get_field(type_or_name, field_name) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1084

def get_field(type_or_name, field_name)
  parent_type = case type_or_name
  when LateBoundType
    get_type(type_or_name.name)
  when String
    get_type(type_or_name)
  when Module
    type_or_name
  else
    raise ArgumentError, "unexpected field owner for #{field_name.inspect}: #{type_or_name.inspect} (#{type_or_name.class})"
  end

  if parent_type.kind.fields? && (field = parent_type.get_field(field_name))
    field
  elsif parent_type == query && (entry_point_field = introspection_system.entry_point(name: field_name))
    entry_point_field
  elsif (dynamic_field = introspection_system.dynamic_field(name: field_name))
    dynamic_field
  else
    nil
  end
end

.get_fields(type) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1107

def get_fields(type)
  type.fields
end

.get_type(type_name) ⇒ Module?

Returns A type, or nil if there’s no type called type_name.

Parameters:

  • type_name (String)

Returns:

  • (Module, nil) —

    A type, or nil if there’s no type called type_name



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# File 'lib/graphql/schema.rb', line 939

def get_type(type_name)
  own_types[type_name] ||
    introspection_system.types[type_name] ||
    find_inherited_value(:types, EMPTY_HASH)[type_name]
end

.graphql_definition ⇒ Object 



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# File 'lib/graphql/schema.rb', line 839

def graphql_definition
  @graphql_definition ||= to_graphql
end

.id_from_object(object, type, ctx) ⇒ Object

Raises:



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# File 'lib/graphql/schema.rb', line 1341

def id_from_object(object, type, ctx)
  raise GraphQL::RequiredImplementationMissingError, "#{self.name}.id_from_object(object, type, ctx) must be implemented to create global ids (tried to create an id for `#{object.inspect}`)"
end

.inaccessible_fields(error) ⇒ AnalysisError?

This hook is called when a client tries to access one or more fields that fail the accessible? check.

By default, an error is added to the response. Override this hook to track metrics or return a different error to the client.

Parameters:

  • error (InaccessibleFieldsError) —

    The analysis error for this check

Returns:



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# File 'lib/graphql/schema.rb', line 1361

def inaccessible_fields(error)
  error
end

.inherited(child_class) ⇒ Object

rubocop:enable Lint/DuplicateMethods



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# File 'lib/graphql/schema.rb', line 1325

def inherited(child_class)
  if self == GraphQL::Schema
    child_class.directives(default_directives.values)
  end
  child_class.singleton_class.prepend(ResolveTypeWithType)
  super
end

.instrument(instrument_step, instrumenter, options = {}) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1424

def instrument(instrument_step, instrumenter, options = {})
  step = if instrument_step == :field && options[:after_built_ins]
    :field_after_built_ins
  else
    instrument_step
  end

  own_instrumenters[step] << instrumenter
end

.instrumenters ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1544

def instrumenters
  inherited_instrumenters = find_inherited_value(:instrumenters) || Hash.new { |h,k| h[k] = [] }
  inherited_instrumenters.merge(own_instrumenters) do |_step, inherited, own|
    inherited + own
  end
end

.interpreter? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 1190

def interpreter?
  if defined?(@interpreter)
    @interpreter
  else
    find_inherited_value(:interpreter?, false)
  end
end

.introspection(new_introspection_namespace = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1111

def introspection(new_introspection_namespace = nil)
  if new_introspection_namespace
    @introspection = new_introspection_namespace
    # reset this cached value:
    @introspection_system = nil
  else
    @introspection || find_inherited_value(:introspection)
  end
end

.introspection_system ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1121

def introspection_system
  if !@introspection_system
    @introspection_system = Schema::IntrospectionSystem.new(self)
    @introspection_system.resolve_late_bindings
  end
  @introspection_system
end

.lazy?(obj) ⇒ Boolean

Returns True if this object should be lazily resolved.

Returns:

  • (Boolean) —

    True if this object should be lazily resolved



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# File 'lib/graphql/schema.rb', line 1589

def lazy?(obj)
  !!lazy_method_name(obj)
end

.lazy_method_name(obj) ⇒ Symbol?

Returns The method name to lazily resolve obj, or nil if obj’s class wasn’t registered wtih #lazy_resolve.

Returns:

  • (Symbol, nil) —

    The method name to lazily resolve obj, or nil if obj’s class wasn’t registered wtih #lazy_resolve.



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# File 'lib/graphql/schema.rb', line 1584

def lazy_method_name(obj)
  lazy_methods.get(obj)
end

.lazy_resolve(lazy_class, value_method) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1420

def lazy_resolve(lazy_class, value_method)
  lazy_methods.set(lazy_class, value_method)
end

.middleware(new_middleware = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1478

def middleware(new_middleware = nil)
  if new_middleware
    own_middleware << new_middleware
  else
    # TODO make sure this is cached when running a query
    MiddlewareChain.new(steps: all_middleware, final_step: GraphQL::Execution::Execute::FieldResolveStep)
  end
end

.multiplex(queries, **kwargs) ⇒ Array<Hash>

Execute several queries on itself, concurrently.

Examples:

Run several queries at once

context = { ... }
queries = [
  { query: params[:query_1], variables: params[:variables_1], context: context },
  { query: params[:query_2], variables: params[:variables_2], context: context },
]
results = MySchema.multiplex(queries)
render json: {
  result_1: results[0],
  result_2: results[1],
}

Parameters:

  • queries (Array<Hash>) —

    Keyword arguments for each query

  • context (Hash) —

    Multiplex-level context

Returns:

  • (Array<Hash>) —

    One result for each query in the input

See Also:

  • for query keyword arguments
  • for multiplex keyword arguments


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# File 'lib/graphql/schema.rb', line 1535

def multiplex(queries, **kwargs)
  schema = if interpreter?
    self
  else
    graphql_definition
  end
  GraphQL::Execution::Multiplex.run_all(schema, queries, **kwargs)
end

.multiplex_analyzer(new_analyzer) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1487

def multiplex_analyzer(new_analyzer)
  own_multiplex_analyzers << new_analyzer
end

.multiplex_analyzers ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1491

def multiplex_analyzers
  find_inherited_value(:multiplex_analyzers, EMPTY_ARRAY) + own_multiplex_analyzers
end

.mutation(new_mutation_object = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 966

def mutation(new_mutation_object = nil)
  if new_mutation_object
    if @mutation_object
      raise GraphQL::Error, "Second definition of `mutation(...)` (#{new_mutation_object.inspect}) is invalid, already configured with #{@mutation_object.inspect}"
    else
      @mutation_object = new_mutation_object
      add_type_and_traverse(new_mutation_object, root: true)
      nil
    end
  else
    @mutation_object || find_inherited_value(:mutation)
  end
end

.mutation_execution_strategy(new_mutation_execution_strategy = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1152

def mutation_execution_strategy(new_mutation_execution_strategy = nil)
  if new_mutation_execution_strategy
    @mutation_execution_strategy = new_mutation_execution_strategy
  else
    @mutation_execution_strategy || find_inherited_value(:mutation_execution_strategy, self.default_execution_strategy)
  end
end

.new_connections? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 948

def new_connections?
  !!connections
end

.object_from_id(node_id, ctx) ⇒ Object

Raises:



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# File 'lib/graphql/schema.rb', line 1337

def object_from_id(node_id, ctx)
  raise GraphQL::RequiredImplementationMissingError, "#{self.name}.object_from_id(node_id, ctx) must be implemented to load by ID (tried to load from id `#{node_id}`)"
end

.orphan_types(*new_orphan_types) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1264

def orphan_types(*new_orphan_types)
  if new_orphan_types.any?
    new_orphan_types = new_orphan_types.flatten
    add_type_and_traverse(new_orphan_types, root: false)
    @orphan_types = new_orphan_types
    own_orphan_types.concat(new_orphan_types.flatten)
  end

  find_inherited_value(:orphan_types, EMPTY_ARRAY) + own_orphan_types
end

.parse_error(parse_err, ctx) ⇒ Object

A function to call when #execute receives an invalid query string

The default is to add the error to context.errors

Parameters:

Returns:

  • void



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# File 'lib/graphql/schema.rb', line 1410

def parse_error(parse_err, ctx)
  ctx.errors.push(parse_err)
end

.plugins ⇒ Object 



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# File 'lib/graphql/schema.rb', line 868

def plugins
  find_inherited_value(:plugins, EMPTY_ARRAY) + own_plugins
end

.possible_types(type = nil, context = GraphQL::Query::NullContext) ⇒ Hash<String, Module>, Array<Module>

Parameters:

  • type (Module) (defaults to: nil) —

    The type definition whose possible types you want to see

Returns:

  • (Hash<String, Module>) —

    All possible types, if no type is given.

  • (Array<Module>) —

    Possible types for type, if it’s given.



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# File 'lib/graphql/schema.rb', line 1016

def possible_types(type = nil, context = GraphQL::Query::NullContext)
  if type
    # TODO duck-typing `.possible_types` would probably be nicer here
    if type.kind.union?
      type.possible_types(context: context)
    else
      own_possible_types[type.graphql_name] ||
        introspection_system.possible_types[type.graphql_name] ||
        (
          superclass.respond_to?(:possible_types) ?
            superclass.possible_types(type, context) :
            EMPTY_ARRAY
        )
    end
  else
    find_inherited_value(:possible_types, EMPTY_HASH)
      .merge(own_possible_types)
      .merge(introspection_system.possible_types)
  end
end

.query(new_query_object = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 952

def query(new_query_object = nil)
  if new_query_object
    if @query_object
      raise GraphQL::Error, "Second definition of `query(...)` (#{new_query_object.inspect}) is invalid, already configured with #{@query_object.inspect}"
    else
      @query_object = new_query_object
      add_type_and_traverse(new_query_object, root: true)
      nil
    end
  else
    @query_object || find_inherited_value(:query)
  end
end

.query_analyzer(new_analyzer) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1467

def query_analyzer(new_analyzer)
  if new_analyzer == GraphQL::Authorization::Analyzer
    warn("The Authorization query analyzer is deprecated. Authorizing at query runtime is generally a better idea.")
  end
  own_query_analyzers << new_analyzer
end

.query_analyzers ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1474

def query_analyzers
  find_inherited_value(:query_analyzers, EMPTY_ARRAY) + own_query_analyzers
end

.query_execution_strategy(new_query_execution_strategy = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1144

def query_execution_strategy(new_query_execution_strategy = nil)
  if new_query_execution_strategy
    @query_execution_strategy = new_query_execution_strategy
  else
    @query_execution_strategy || find_inherited_value(:query_execution_strategy, self.default_execution_strategy)
  end
end

.references_to(to_type = nil, from: nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1052

def references_to(to_type = nil, from: nil)
  @own_references_to ||= Hash.new { |h, k| h[k] = [] }
  if to_type
    if !to_type.is_a?(String)
      to_type = to_type.graphql_name
    end

    if from
      @own_references_to[to_type] << from
    else
      own_refs = @own_references_to[to_type]
      inherited_refs = find_inherited_value(:references_to, EMPTY_HASH)[to_type] || EMPTY_ARRAY
      own_refs + inherited_refs
    end
  else
    # `@own_references_to` can be quite large for big schemas,
    # and generally speaking, we won't inherit any values.
    # So optimize the most common case -- don't create a duplicate Hash.
    inherited_value = find_inherited_value(:references_to, EMPTY_HASH)
    if inherited_value.any?
      inherited_value.merge(@own_references_to)
    else
      @own_references_to
    end
  end
end

.rescue_from(*err_classes, &handler_block) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1291

def rescue_from(*err_classes, &handler_block)
  err_classes.each do |err_class|
    own_rescues[err_class] = handler_block
  end
end

.rescues ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1333

def rescues
  find_inherited_value(:rescues, EMPTY_HASH).merge(own_rescues)
end

.resolve_type(type, obj, ctx) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1316

def resolve_type(type, obj, ctx)
  if type.kind.object?
    type
  else
    raise GraphQL::RequiredImplementationMissingError, "#{self.name}.resolve_type(type, obj, ctx) must be implemented to use Union types or Interface types (tried to resolve: #{type.name})"
  end
end

.root_type_for_operation(operation) ⇒ GraphQL::ObjectType?

Returns:

See Also:

  • Resticted access to root types


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# File 'lib/graphql/schema.rb', line 996

def root_type_for_operation(operation)
  case operation
  when "query"
    query
  when "mutation"
    mutation
  when "subscription"
    subscription
  else
    raise ArgumentError, "unknown operation type: #{operation}"
  end
end

.root_types ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1009

def root_types
  @root_types
end

.static_validator ⇒ Object 



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# File 'lib/graphql/schema.rb', line 855

def static_validator
  GraphQL::StaticValidation::Validator.new(schema: self)
end

.subscription(new_subscription_object = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 980

def subscription(new_subscription_object = nil)
  if new_subscription_object
    if @subscription_object
      raise GraphQL::Error, "Second definition of `subscription(...)` (#{new_subscription_object.inspect}) is invalid, already configured with #{@subscription_object.inspect}"
    else
      @subscription_object = new_subscription_object
      add_type_and_traverse(new_subscription_object, root: true)
      nil
    end
  else
    @subscription_object || find_inherited_value(:subscription)
  end
end

.subscription_execution_strategy(new_subscription_execution_strategy = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1160

def subscription_execution_strategy(new_subscription_execution_strategy = nil)
  if new_subscription_execution_strategy
    @subscription_execution_strategy = new_subscription_execution_strategy
  else
    @subscription_execution_strategy || find_inherited_value(:subscription_execution_strategy, self.default_execution_strategy)
  end
end

.sync_lazy(value) ⇒ Object

Override this method to handle lazy objects in a custom way.

Parameters:

Returns:

  • (Object) —

    A GraphQL-ready (non-lazy) object



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# File 'lib/graphql/schema.rb', line 1573

def sync_lazy(value)
  lazy_method = lazy_method_name(value)
  if lazy_method
    synced_value = value.public_send(lazy_method)
    sync_lazy(synced_value)
  else
    value
  end
end

.to_definition(only: nil, except: nil, context: {}) ⇒ String

Return the GraphQL IDL for the schema

Parameters:

  • context (Hash) (defaults to: {})
  • only (<#call(member, ctx)>) (defaults to: nil)
  • except (<#call(member, ctx)>) (defaults to: nil)

Returns:

  • (String) 


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# File 'lib/graphql/schema.rb', line 821

def to_definition(only: nil, except: nil, context: {})
  GraphQL::Schema::Printer.print_schema(self, only: only, except: except, context: context)
end

.to_document ⇒ GraphQL::Language::Document

Return the GraphQL::Language::Document IDL AST for the schema

Returns:

  • (GraphQL::Language::Document) 


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# File 'lib/graphql/schema.rb', line 827

def to_document
  GraphQL::Language::DocumentFromSchemaDefinition.new(self).document
end

.to_graphql ⇒ Object 



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# File 'lib/graphql/schema.rb', line 872

def to_graphql
  schema_defn = self.new
  schema_defn.raise_definition_error = true
  schema_defn.query = query && query.graphql_definition
  schema_defn.mutation = mutation && mutation.graphql_definition
  schema_defn.subscription = subscription && subscription.graphql_definition
  schema_defn.max_complexity = max_complexity
  schema_defn.error_bubbling = error_bubbling
  schema_defn.max_depth = max_depth
  schema_defn.default_max_page_size = default_max_page_size
  schema_defn.orphan_types = orphan_types.map(&:graphql_definition)
  schema_defn.disable_introspection_entry_points = disable_introspection_entry_points?
  schema_defn.disable_schema_introspection_entry_point = disable_schema_introspection_entry_point?
  schema_defn.disable_type_introspection_entry_point = disable_type_introspection_entry_point?

  prepped_dirs = {}
  directives.each { |k, v| prepped_dirs[k] = v.graphql_definition}
  schema_defn.directives = prepped_dirs
  schema_defn.introspection_namespace = introspection
  schema_defn.resolve_type = method(:resolve_type)
  schema_defn.object_from_id = method(:object_from_id)
  schema_defn.id_from_object = method(:id_from_object)
  schema_defn.type_error = method(:type_error)
  schema_defn.context_class = context_class
  schema_defn.cursor_encoder = cursor_encoder
  schema_defn.tracers.concat(tracers)
  schema_defn.query_analyzers.concat(query_analyzers)

  schema_defn.middleware.concat(all_middleware)
  schema_defn.multiplex_analyzers.concat(multiplex_analyzers)
  schema_defn.query_execution_strategy = query_execution_strategy
  schema_defn.mutation_execution_strategy = mutation_execution_strategy
  schema_defn.subscription_execution_strategy = subscription_execution_strategy
  schema_defn.default_mask = default_mask
  instrumenters.each do |step, insts|
    insts.each do |inst|
      schema_defn.instrumenters[step] << inst
    end
  end

  lazy_methods.each do |lazy_class, value_method|
    schema_defn.lazy_methods.set(lazy_class, value_method)
  end

  rescues.each do |err_class, handler|
    schema_defn.rescue_from(err_class, &handler)
  end

  schema_defn.subscriptions ||= self.subscriptions

  if !schema_defn.interpreter?
    schema_defn.instrumenters[:query] << GraphQL::Schema::Member::Instrumentation
  end
  schema_defn.send(:rebuild_artifacts)

  schema_defn
end

.to_json(*args) ⇒ String

Returns the JSON response of Introspection::INTROSPECTION_QUERY.

Returns:

  • (String)

See Also:

  • {{#as_json}


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# File 'lib/graphql/schema.rb', line 803

def to_json(*args)
  JSON.pretty_generate(as_json(*args))
end

.tracer(new_tracer) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1459

def tracer(new_tracer)
  own_tracers << new_tracer
end

.tracers ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1463

def tracers
  find_inherited_value(:tracers, EMPTY_ARRAY) + own_tracers
end

.type_error(type_err, ctx) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1400

def type_error(type_err, ctx)
  DefaultTypeError.call(type_err, ctx)
end

.type_from_ast(ast_node, context: nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1079

def type_from_ast(ast_node, context: nil)
  type_owner = context ? context.warden : self
  GraphQL::Schema::TypeExpression.build_type(type_owner, ast_node)
end

.types ⇒ Hash<String => Class>

Build a map of { name => type } and return it

Returns:

  • (Hash<String => Class>) —

    A dictionary of type classes by their GraphQL name

See Also:



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# File 'lib/graphql/schema.rb', line 933

def types
  non_introspection_types.merge(introspection_system.types)
end

.unauthorized_field(unauthorized_error) ⇒ Field

This hook is called when a field fails an authorized? check.

By default, this hook implements the same behavior as unauthorized_object.

Whatever value is returned from this method will be used instead of the unauthorized field . If an error is raised, then nil will be used.

If you want to add an error to the "errors" key, raise a ExecutionError in this hook.

Parameters:

Returns:

  • (Field) —

    The returned field will be put in the GraphQL response



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# File 'lib/graphql/schema.rb', line 1396

def unauthorized_field(unauthorized_error)
  unauthorized_object(unauthorized_error)
end

.unauthorized_object(unauthorized_error) ⇒ Object

This hook is called when an object fails an authorized? check. You might report to your bug tracker here, so you can correct the field resolvers not to return unauthorized objects.

By default, this hook just replaces the unauthorized object with nil.

Whatever value is returned from this method will be used instead of the unauthorized object (accessible as unauthorized_error.object). If an error is raised, then nil will be used.

If you want to add an error to the "errors" key, raise a ExecutionError in this hook.

Parameters:

Returns:

  • (Object) —

    The returned object will be put in the GraphQL response



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# File 'lib/graphql/schema.rb', line 1380

def unauthorized_object(unauthorized_error)
  nil
end

.union_memberships(type = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1037

def union_memberships(type = nil)
  if type
    own_um = own_union_memberships.fetch(type.graphql_name, EMPTY_ARRAY)
    inherited_um = find_inherited_value(:union_memberships, EMPTY_HASH).fetch(type.graphql_name, EMPTY_ARRAY)
    own_um + inherited_um
  else
    joined_um = own_union_memberships.dup
    find_inherited_value(:union_memberhips, EMPTY_HASH).each do |k, v|
      um = joined_um[k] ||= []
      um.concat(v)
    end
    joined_um
  end
end

.use(plugin, **kwargs) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 859

def use(plugin, **kwargs)
  if kwargs.any?
    plugin.use(self, **kwargs)
  else
    plugin.use(self)
  end
  own_plugins << [plugin, kwargs]
end

.using_ast_analysis? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 1186

def using_ast_analysis?
  analysis_engine == GraphQL::Analysis::AST
end

.visible?(member, ctx) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 1345

def visible?(member, ctx)
  member.type_class.visible?(ctx)
end

Instance Method Details

#accessible?(member, context) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 667

def accessible?(member, context)
  call_on_type_class(member, :accessible?, context, default: true)
end

#after_lazy(value) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Call the given block at the right time, either: - Right away, if value is not registered with lazy_resolve - After resolving value, if it’s registered with lazy_resolve (eg, Promise)



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# File 'lib/graphql/schema.rb', line 1841

def after_lazy(value)
  if lazy?(value)
    GraphQL::Execution::Lazy.new do
      result = sync_lazy(value)
      # The returned result might also be lazy, so check it, too
      after_lazy(result) do |final_result|
        yield(final_result) if block_given?
      end
    end
  else
    yield(value) if block_given?
  end
end

#as_json(only: nil, except: nil, context: {}) ⇒ Hash

Return the Hash response of Introspection::INTROSPECTION_QUERY.

Parameters:

  • context (Hash) (defaults to: {})
  • only (<#call(member, ctx)>) (defaults to: nil)
  • except (<#call(member, ctx)>) (defaults to: nil)

Returns:

  • (Hash) —

    GraphQL result



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# File 'lib/graphql/schema.rb', line 764

def as_json(only: nil, except: nil, context: {})
  execute(Introspection::INTROSPECTION_QUERY, only: only, except: except, context: context).to_h
end

#call_on_type_class(member, method_name, context, default:) ⇒ Object

Given this schema member, find the class-based definition object whose method_name should be treated as an application hook

See Also:

  • GraphQL::Schema.{{.visible?}
  • GraphQL::Schema.{{.accessible?}


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# File 'lib/graphql/schema.rb', line 645

def call_on_type_class(member, method_name, context, default:)
  member = if member.respond_to?(:type_class)
    member.type_class
  else
    member
  end

  if member.respond_to?(:relay_node_type) && (t = member.relay_node_type)
    member = t
  end

  if member.respond_to?(method_name)
    member.public_send(method_name, context)
  else
    default
  end
end

#check_resolved_type(type, object, ctx = :__undefined__) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

This is a compatibility hack so that instance-level and class-level methods can get correctness checks without calling one another



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# File 'lib/graphql/schema.rb', line 542

def check_resolved_type(type, object, ctx = :__undefined__)
  if ctx == :__undefined__
    # Old method signature
    ctx = object
    object = type
    type = nil
  end

  if object.is_a?(GraphQL::Schema::Object)
    object = object.object
  end

  if type.respond_to?(:graphql_definition)
    type = type.graphql_definition
  end

  # Prefer a type-local function; fall back to the schema-level function
  type_proc = type && type.resolve_type_proc
  type_result = if type_proc
    type_proc.call(object, ctx)
  else
    yield(type, object, ctx)
  end

  if type_result.nil?
    nil
  else
    after_lazy(type_result) do |resolved_type_result|
      if resolved_type_result.respond_to?(:graphql_definition)
        resolved_type_result = resolved_type_result.graphql_definition
      end
      if !resolved_type_result.is_a?(GraphQL::BaseType)
        type_str = "#{resolved_type_result} (#{resolved_type_result.class.name})"
        raise "resolve_type(#{object}) returned #{type_str}, but it should return a GraphQL type"
      else
        resolved_type_result
      end
    end
  end
end

#default_filter ⇒ Object 



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# File 'lib/graphql/schema.rb', line 186

def default_filter
  GraphQL::Filter.new(except: default_mask)
end

#define(**kwargs, &block) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 308

def define(**kwargs, &block)
  super
  ensure_defined
  # Assert that all necessary configs are present:
  validation_error = Validation.validate(self)
  validation_error && raise(GraphQL::RequiredImplementationMissingError, validation_error)
  rebuild_artifacts

  @definition_error = nil
  nil
rescue StandardError => err
  if @raise_definition_error || err.is_a?(CyclicalDefinitionError) || err.is_a?(GraphQL::RequiredImplementationMissingError)
    raise
  else
    # Raise this error _later_ to avoid messing with Rails constant loading
    @definition_error = err
  end
  nil
end

#disable_introspection_entry_points? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 164

def disable_introspection_entry_points?
  !!@disable_introspection_entry_points
end

#disable_schema_introspection_entry_point? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 171

def disable_schema_introspection_entry_point?
  !!@disable_schema_introspection_entry_point
end

#disable_type_introspection_entry_point? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 178

def disable_type_introspection_entry_point?
  !!@disable_type_introspection_entry_point
end

#execute(query_str = nil, **kwargs) ⇒ Hash

Execute a query on itself. Raises an error if the schema definition is invalid.

Returns:

  • (Hash) —

    query result, ready to be serialized as JSON

See Also:

  • for arguments.


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# File 'lib/graphql/schema.rb', line 391

def execute(query_str = nil, **kwargs)
  if query_str
    kwargs[:query] = query_str
  end
  # Some of the query context _should_ be passed to the multiplex, too
  multiplex_context = if (ctx = kwargs[:context])
    {
      backtrace: ctx[:backtrace],
      tracers: ctx[:tracers],
    }
  else
    {}
  end
  # Since we're running one query, don't run a multiplex-level complexity analyzer
  all_results = multiplex([kwargs], max_complexity: nil, context: multiplex_context)
  all_results[0]
end

#execution_strategy_for_operation(operation) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 510

def execution_strategy_for_operation(operation)
  case operation
  when "query"
    query_execution_strategy
  when "mutation"
    mutation_execution_strategy
  when "subscription"
    subscription_execution_strategy
  else
    raise ArgumentError, "unknown operation type: #{operation}"
  end
end

#find(path) ⇒ GraphQL::BaseType, ...

Search for a schema member using a string path Schema.find(“Ensemble.musicians”)

Examples:

Finding a Field

Parameters:

  • path (String) —

    A dot-separated path to the member

Returns:

Raises:

See Also:

  • for more examples


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# File 'lib/graphql/schema.rb', line 441

def find(path)
  rebuild_artifacts unless defined?(@finder)
  @find_cache[path] ||= @finder.find(path)
end

#get_field(parent_type, field_name) ⇒ GraphQL::Field?

Resolve field named field_name for type parent_type. Handles dynamic fields __typename, __type and __schema, too

Parameters:

Returns:

See Also:

  • Restricted access to members of a schema


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# File 'lib/graphql/schema.rb', line 452

def get_field(parent_type, field_name)
  with_definition_error_check do
    parent_type_name = case parent_type
    when GraphQL::BaseType, Class, Module
      parent_type.graphql_name
    when String
      parent_type
    else
      raise "Unexpected parent_type: #{parent_type}"
    end

    defined_field = @instrumented_field_map[parent_type_name][field_name]
    if defined_field
      defined_field
    elsif parent_type == query && (entry_point_field = introspection_system.entry_point(name: field_name))
      entry_point_field
    elsif (dynamic_field = introspection_system.dynamic_field(name: field_name))
      dynamic_field
    else
      nil
    end
  end
end

#get_fields(type) ⇒ Hash<String, GraphQL::Field>

Fields for this type, after instrumentation is applied

Returns:



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# File 'lib/graphql/schema.rb', line 478

def get_fields(type)
  @instrumented_field_map[type.graphql_name]
end

#get_type(type_name) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 356

def get_type(type_name)
  @types[type_name]
end

#id_from_object(object, type, ctx) ⇒ String

Get a unique identifier from this object

Parameters:

Returns:

  • (String) —

    a unique identifier for object which clients can use to refetch it



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# File 'lib/graphql/schema.rb', line 691

def id_from_object(object, type, ctx)
  if @id_from_object_proc.nil?
    raise(GraphQL::RequiredImplementationMissingError, "Can't generate an ID for #{object.inspect} of type #{type}, schema's `id_from_object` must be defined")
  else
    @id_from_object_proc.call(object, type, ctx)
  end
end

#id_from_object=(new_proc) ⇒ Object

Parameters:

  • new_proc (#call) —

    A new callable for generating unique IDs



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# File 'lib/graphql/schema.rb', line 700

def id_from_object=(new_proc)
  @id_from_object_proc = new_proc
end

#initialize_copy(other) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 248

def initialize_copy(other)
  super
  @orphan_types = other.orphan_types.dup
  @directives = other.directives.dup
  @static_validator = GraphQL::StaticValidation::Validator.new(schema: self)
  @middleware = other.middleware.dup
  @query_analyzers = other.query_analyzers.dup
  @multiplex_analyzers = other.multiplex_analyzers.dup
  @tracers = other.tracers.dup
  @possible_types = GraphQL::Schema::PossibleTypes.new(self)

  @lazy_methods = other.lazy_methods.dup

  @instrumenters = Hash.new { |h, k| h[k] = [] }
  other.instrumenters.each do |key, insts|
    @instrumenters[key].concat(insts)
  end

  if other.rescues?
    @rescue_middleware = other.rescue_middleware
  end

  # This will be rebuilt when it's requested
  # or during a later `define` call
  @types = nil
  @introspection_system = nil
end

#inspect ⇒ Object 



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# File 'lib/graphql/schema.rb', line 244

def inspect
  "#<#{self.class.name} ...>"
end

#instrument(instrumentation_type, instrumenter) ⇒ void

This method returns an undefined value.

Attach instrumenter to this schema for instrumenting events of instrumentation_type.

Parameters:

  • instrumentation_type (Symbol)
  • instrumenter 


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# File 'lib/graphql/schema.rb', line 332

def instrument(instrumentation_type, instrumenter)
  @instrumenters[instrumentation_type] << instrumenter
  if instrumentation_type == :field
    rebuild_artifacts
  end
end

#interpreter? ⇒ Boolean

Returns True if using the new Execution::Interpreter.

Returns:



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# File 'lib/graphql/schema.rb', line 237

def interpreter?
  @interpreter
end

#introspection_system ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/graphql/schema.rb', line 361

def introspection_system
  @introspection_system ||= begin
    rebuild_artifacts
    @introspection_system
  end
end

#lazy?(obj) ⇒ Boolean

Returns True if this object should be lazily resolved.

Returns:

  • (Boolean) —

    True if this object should be lazily resolved



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# File 'lib/graphql/schema.rb', line 737

def lazy?(obj)
  !!lazy_method_name(obj)
end

#lazy_method_name(obj) ⇒ Symbol?

Returns The method name to lazily resolve obj, or nil if obj’s class wasn’t registered wtih #lazy_resolve.

Returns:

  • (Symbol, nil) —

    The method name to lazily resolve obj, or nil if obj’s class wasn’t registered wtih #lazy_resolve.



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# File 'lib/graphql/schema.rb', line 732

def lazy_method_name(obj)
  @lazy_methods.get(obj)
end

#multiplex(queries, **kwargs) ⇒ Array<Hash>

Execute several queries on itself. Raises an error if the schema definition is invalid.

Examples:

Run several queries at once

context = { ... }
queries = [
  { query: params[:query_1], variables: params[:variables_1], context: context },
  { query: params[:query_2], variables: params[:variables_2], context: context },
]
results = MySchema.multiplex(queries)
render json: {
  result_1: results[0],
  result_2: results[1],
}

Parameters:

  • queries (Array<Hash>) —

    Keyword arguments for each query

  • context (Hash) —

    Multiplex-level context

Returns:

  • (Array<Hash>) —

    One result for each query in the input

See Also:

  • for query keyword arguments
  • for multiplex keyword arguments


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# File 'lib/graphql/schema.rb', line 427

def multiplex(queries, **kwargs)
  with_definition_error_check {
    GraphQL::Execution::Multiplex.run_all(self, queries, **kwargs)
  }
end

#new_connections? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 775

def new_connections?
  !!connections
end

#object_from_id(id, ctx) ⇒ Any

Fetch an application object by its unique id

Parameters:

  • id (String) —

    A unique identifier, provided previously by this GraphQL schema

  • ctx (GraphQL::Query::Context) —

    The context for the current query

Returns:

  • (Any) —

    The application object identified by id



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# File 'lib/graphql/schema.rb', line 592

def object_from_id(id, ctx)
  if @object_from_id_proc.nil?
    raise(GraphQL::RequiredImplementationMissingError, "Can't fetch an object for id \"#{id}\" because the schema's `object_from_id (id, ctx) -> { ... }` function is not defined")
  else
    @object_from_id_proc.call(id, ctx)
  end
end

#object_from_id=(new_proc) ⇒ Object

Parameters:

  • new_proc (#call) —

    A new callable for fetching objects by ID



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# File 'lib/graphql/schema.rb', line 601

def object_from_id=(new_proc)
  @object_from_id_proc = new_proc
end

#parse_error(err, ctx) ⇒ Object

A function to call when #execute receives an invalid query string

Parameters:

Returns:

  • void

See Also:

  • is the default behavior.


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# File 'lib/graphql/schema.rb', line 677

def parse_error(err, ctx)
  @parse_error_proc.call(err, ctx)
end

#parse_error=(new_proc) ⇒ Object

Parameters:

  • new_proc (#call) —

    A new callable for handling parse errors during execution



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# File 'lib/graphql/schema.rb', line 682

def parse_error=(new_proc)
  @parse_error_proc = new_proc
end

#possible_types(type_defn, context = GraphQL::Query::NullContext) ⇒ Array<GraphQL::ObjectType>

Returns types which belong to type_defn in this schema.

Parameters:

Returns:

See Also:

  • Restricted access to members of a schema


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# File 'lib/graphql/schema.rb', line 490

def possible_types(type_defn, context = GraphQL::Query::NullContext)
  @possible_types ||= GraphQL::Schema::PossibleTypes.new(self)
  @possible_types.possible_types(type_defn, context)
end

#references_to(type_name = nil) ⇒ Hash

Returns a list of Arguments and Fields referencing a certain type

Parameters:

  • type_name (String) (defaults to: nil)

Returns:

  • (Hash) 


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# File 'lib/graphql/schema.rb', line 371

def references_to(type_name = nil)
  rebuild_artifacts unless defined?(@type_reference_map)
  if type_name
    @type_reference_map.fetch(type_name, [])
  else
    @type_reference_map
  end
end

#remove_handler(*args, &block) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 280

def remove_handler(*args, &block)
  rescue_middleware.remove_handler(*args, &block)
end

#rescue_from(*args, &block) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 276

def rescue_from(*args, &block)
  rescue_middleware.rescue_from(*args, &block)
end

#resolve_type(type, object, ctx = :__undefined__) ⇒ GraphQL::ObjectType

Determine the GraphQL type for a given object. This is required for unions and interfaces (including Relay’s Node interface)

Parameters:

  • type (GraphQL::UnionType, GraphQL:InterfaceType) —

    the abstract type which is being resolved

  • object (Any) —

    An application object which GraphQL is currently resolving on

  • ctx (GraphQL::Query::Context) (defaults to: :__undefined__) —

    The context for the current query

Returns:

See Also:

  • Restricted access to members of a schema


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# File 'lib/graphql/schema.rb', line 530

def resolve_type(type, object, ctx = :__undefined__)
  check_resolved_type(type, object, ctx) do |ok_type, ok_object, ok_ctx|
    if @resolve_type_proc.nil?
      raise(GraphQL::RequiredImplementationMissingError, "Can't determine GraphQL type for: #{ok_object.inspect}, define `resolve_type (type, obj, ctx) -> { ... }` inside `Schema.define`.")
    end
    @resolve_type_proc.call(ok_type, ok_object, ok_ctx)
  end
end

#resolve_type=(new_resolve_type_proc) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 583

def resolve_type=(new_resolve_type_proc)
  callable = GraphQL::BackwardsCompatibility.wrap_arity(new_resolve_type_proc, from: 2, to: 3, last: true, name: "Schema#resolve_type(type, obj, ctx)")
  @resolve_type_proc = callable
end

#root_type_for_operation(operation) ⇒ GraphQL::ObjectType?

Returns:

See Also:

  • Resticted access to root types


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# File 'lib/graphql/schema.rb', line 497

def root_type_for_operation(operation)
  case operation
  when "query"
    query
  when "mutation"
    mutation
  when "subscription"
    subscription
  else
    raise ArgumentError, "unknown operation type: #{operation}"
  end
end

#root_types ⇒ Array<GraphQL::BaseType>

Returns The root types of this schema.

Returns:



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# File 'lib/graphql/schema.rb', line 340

def root_types
  @root_types ||= begin
    rebuild_artifacts
    @root_types
  end
end

#sync_lazy(value) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

See Also:



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# File 'lib/graphql/schema.rb', line 1857

def sync_lazy(value)
  lazy_method = lazy_method_name(value)
  if lazy_method
    synced_value = value.public_send(lazy_method)
    sync_lazy(synced_value)
  else
    value
  end
end

#to_definition(only: nil, except: nil, context: {}) ⇒ String

Return the GraphQL IDL for the schema

Parameters:

  • context (Hash) (defaults to: {})
  • only (<#call(member, ctx)>) (defaults to: nil)
  • except (<#call(member, ctx)>) (defaults to: nil)

Returns:

  • (String) 


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# File 'lib/graphql/schema.rb', line 746

def to_definition(only: nil, except: nil, context: {})
  GraphQL::Schema::Printer.print_schema(self, only: only, except: except, context: context)
end

#to_document(only: nil, except: nil, context: {}) ⇒ GraphQL::Language::Document

Return the GraphQL::Language::Document IDL AST for the schema

Parameters:

  • context (Hash) (defaults to: {})
  • only (<#call(member, ctx)>) (defaults to: nil)
  • except (<#call(member, ctx)>) (defaults to: nil)

Returns:

  • (GraphQL::Language::Document) 


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# File 'lib/graphql/schema.rb', line 755

def to_document(only: nil, except: nil, context: {})
  GraphQL::Language::DocumentFromSchemaDefinition.new(self, only: only, except: except, context: context).document
end

#to_json(*args) ⇒ String

Returns the JSON response of Introspection::INTROSPECTION_QUERY.

Returns:

  • (String)

See Also:

  • GraphQL::Schema.{{#as_json}


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# File 'lib/graphql/schema.rb', line 771

def to_json(*args)
  JSON.pretty_generate(as_json(*args))
end

#type_error(err, ctx) ⇒ Object

When we encounter a type error during query execution, we call this hook.

You can use this hook to write a log entry, add a ExecutionError to the response (with ctx.add_error) or raise an exception and halt query execution.

Examples:

A nil is encountered by a non-null field

type_error ->(err, query_ctx) {
  err.is_a?(GraphQL::InvalidNullError) # => true
}

An object doesn’t resolve to one of a UnionType’s members

type_error ->(err, query_ctx) {
  err.is_a?(GraphQL::UnresolvedTypeError) # => true
}

Parameters:

  • err (GraphQL::TypeError) —

    The error encountered during execution

  • ctx (GraphQL::Query::Context) —

    The context for the field where the error occurred

Returns:

  • void

See Also:

  • is the default behavior.


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# File 'lib/graphql/schema.rb', line 625

def type_error(err, ctx)
  @type_error_proc.call(err, ctx)
end

#type_error=(new_proc) ⇒ Object

Parameters:

  • new_proc (#call) —

    A new callable for handling type errors during execution



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# File 'lib/graphql/schema.rb', line 630

def type_error=(new_proc)
  @type_error_proc = new_proc
end

#type_from_ast(ast_node, context:) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 482

def type_from_ast(ast_node, context:)
  GraphQL::Schema::TypeExpression.build_type(self, ast_node)
end

#types ⇒ GraphQL::Schema::TypeMap

Returns { name => type } pairs of types in this schema.

Returns:

  • (GraphQL::Schema::TypeMap) —

    { name => type } pairs of types in this schema

See Also:

  • Restricted access to members of a schema


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# File 'lib/graphql/schema.rb', line 349

def types
  @types ||= begin
    rebuild_artifacts
    @types
  end
end

#union_memberships(type) ⇒ Array<GraphQL::UnionType>

Returns a list of Union types in which a type is a member

Parameters:

Returns:



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# File 'lib/graphql/schema.rb', line 383

def union_memberships(type)
  rebuild_artifacts unless defined?(@union_memberships)
  @union_memberships.fetch(type.name, [])
end

#using_ast_analysis? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 284

def using_ast_analysis?
  @analysis_engine == GraphQL::Analysis::AST
end

#validate(string_or_document, rules: nil, context: nil) ⇒ Array<GraphQL::StaticValidation::Error >

Validate a query string according to this schema.

Parameters:

Returns:



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# File 'lib/graphql/schema.rb', line 294

def validate(string_or_document, rules: nil, context: nil)
  doc = if string_or_document.is_a?(String)
    GraphQL.parse(string_or_document)
  else
    string_or_document
  end
  query = GraphQL::Query.new(self, document: doc, context: context)
  validator_opts = { schema: self }
  rules && (validator_opts[:rules] = rules)
  validator = GraphQL::StaticValidation::Validator.new(**validator_opts)
  res = validator.validate(query)
  res[:errors]
end

#visible?(member, context) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 663

def visible?(member, context)
  call_on_type_class(member, :visible?, context, default: true)
end