Class: GraphQL::Schema

Inherits:
Object
  • Object
show all
Extended by:
Forwardable, FindInheritedValue, Member::AcceptsDefinition
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/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/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/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, MethodWrappers, NullMask, 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, Union, Validation, Warden, Wrapper

Constant Summary collapse

DYNAMIC_FIELDS = 
["__type", "__typename", "__schema"].freeze
EMPTY_ARRAY = 
[].freeze
EMPTY_HASH = 
{}.freeze
Context = 
GraphQL::Query::Context
BUILT_IN_TYPES = 
{
  "Int" => INT_TYPE,
  "String" => STRING_TYPE,
  "Float" => FLOAT_TYPE,
  "Boolean" => BOOLEAN_TYPE,
  "ID" => ID_TYPE,
}

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 174

def initialize
  @tracers = []
  @definition_error = nil
  @orphan_types = []
  @directives = self.class.default_directives
  @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
end

Class Attribute Details

.default_execution_strategy ⇒ Object 



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# File 'lib/graphql/schema.rb', line 929

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

Instance Attribute Details

#analysis_engine ⇒ Object

Returns the value of attribute analysis_engine



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# File 'lib/graphql/schema.rb', line 123

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 123

def ast_node
  @ast_node
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 151

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 123

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 147

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 123

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 123

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 154

def disable_introspection_entry_points
  @disable_introspection_entry_points
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 136

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 172

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 123

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 213

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 123

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 123

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 123

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 123

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 143

def middleware
  @middleware
end

#multiplex_analyzers ⇒ Object

Returns the value of attribute multiplex_analyzers



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# File 'lib/graphql/schema.rb', line 123

def multiplex_analyzers
  @multiplex_analyzers
end

#mutation ⇒ Object

Returns the value of attribute mutation



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# File 'lib/graphql/schema.rb', line 123

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 123

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 172

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 123

def orphan_types
  @orphan_types
end

#query ⇒ Object

Returns the value of attribute query



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# File 'lib/graphql/schema.rb', line 123

def query
  @query
end

#query_analyzers ⇒ Object

Returns the value of attribute query_analyzers



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# File 'lib/graphql/schema.rb', line 123

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 123

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 123

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 172

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 172

def static_validator
  @static_validator
end

#subscription ⇒ Object

Returns the value of attribute subscription



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# File 'lib/graphql/schema.rb', line 123

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 123

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 140

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 166

def tracers
  @tracers
end

Class Method Details

.accessible?(member, context) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 975

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

.context_class(new_context_class = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 937

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 846

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 1056

def default_directives
  {
    "include" => GraphQL::Directive::IncludeDirective,
    "skip" => GraphQL::Directive::SkipDirective,
    "deprecated" => GraphQL::Directive::DeprecatedDirective,
  }
end

.default_max_page_size(new_default_max_page_size = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 853

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 



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

def directive(new_directive)
  own_directives[new_directive.graphql_name] = new_directive
end

.directives(new_directives = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1044

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 909

def disable_introspection_entry_points
  @disable_introspection_entry_points = true
end

.disable_introspection_entry_points? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 913

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

.error_bubbling(new_error_bubbling = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 893

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

.from_definition(definition_or_path, default_resolve: BuildFromDefinition::DefaultResolve, parser: BuildFromDefinition::DefaultParser) ⇒ GraphQL::Schema

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)>) —

    A callable for handling field resolution

  • parser (Object) —

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

Returns:



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# File 'lib/graphql/schema.rb', line 646

def self.from_definition(definition_or_path, default_resolve: BuildFromDefinition::DefaultResolve, parser: BuildFromDefinition::DefaultParser)
  # 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)
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 637

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

.graphql_definition ⇒ Object 



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# File 'lib/graphql/schema.rb', line 734

def graphql_definition
  @graphql_definition ||= to_graphql
end

.id_from_object(object, type, ctx) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/graphql/schema.rb', line 967

def id_from_object(object, type, ctx)
  raise NotImplementedError, "#{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 987

def inaccessible_fields(error)
  error
end

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



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# File 'lib/graphql/schema.rb', line 1034

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

.introspection(new_introspection_namespace = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 838

def introspection(new_introspection_namespace = nil)
  if new_introspection_namespace
    @introspection = new_introspection_namespace
  else
    @introspection || find_inherited_value(:introspection)
  end
end

.lazy_resolve(lazy_class, value_method) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1030

def lazy_resolve(lazy_class, value_method)
  lazy_classes[lazy_class] = value_method
end

.max_complexity(max_complexity = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 885

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

.max_depth(new_max_depth = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 901

def max_depth(new_max_depth = nil)
  if new_max_depth
    @max_depth = new_max_depth
  else
    @max_depth || find_inherited_value(:max_depth)
  end
end

.middleware(new_middleware = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1083

def middleware(new_middleware = nil)
  if new_middleware
    own_middleware << new_middleware
  else
    graphql_definition.middleware
  end
end

.multiplex_analyzer(new_analyzer) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1091

def multiplex_analyzer(new_analyzer)
  own_multiplex_analyzers << new_analyzer
end

.multiplex_analyzers ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1095

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 820

def mutation(new_mutation_object = nil)
  if new_mutation_object
    @mutation_object = new_mutation_object
  else
    mutation_object = @mutation_object || find_inherited_value(:mutation)
    mutation_object.respond_to?(:graphql_definition) ? mutation_object.graphql_definition : mutation_object
  end
end

.mutation_execution_strategy(new_mutation_execution_strategy = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 869

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

.object_from_id(node_id, ctx) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/graphql/schema.rb', line 963

def object_from_id(node_id, ctx)
  raise NotImplementedError, "#{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 921

def orphan_types(*new_orphan_types)
  if new_orphan_types.any?
    own_orphan_types.concat(new_orphan_types.flatten)
  end

  find_inherited_value(:orphan_types, EMPTY_ARRAY) + own_orphan_types
end

.plugins ⇒ Object 



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# File 'lib/graphql/schema.rb', line 742

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

.query(new_query_object = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 811

def query(new_query_object = nil)
  if new_query_object
    @query_object = new_query_object
  else
    query_object = @query_object || find_inherited_value(:query)
    query_object.respond_to?(:graphql_definition) ? query_object.graphql_definition : query_object
  end
end

.query_analyzer(new_analyzer) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1072

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 1079

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 861

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

.rescue_from(*err_classes, &handler_block) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 945

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 951

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 955

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

.subscription(new_subscription_object = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 829

def subscription(new_subscription_object = nil)
  if new_subscription_object
    @subscription_object = new_subscription_object
  else
    subscription_object = @subscription_object || find_inherited_value(:subscription)
    subscription_object.respond_to?(:graphql_definition) ? subscription_object.graphql_definition : subscription_object
  end
end

.subscription_execution_strategy(new_subscription_execution_strategy = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 877

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 1214

def self.sync_lazy(value)
  if block_given?
    # This was already hit by the instance, just give it back
    yield(value)
  else
    # This was called directly on the class, hit the instance
    # which has the lazy method map
    self.graphql_definition.sync_lazy(value)
  end
end

.to_graphql ⇒ Object 



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

def to_graphql
  schema_defn = self.new
  schema_defn.raise_definition_error = true
  schema_defn.query = query
  schema_defn.mutation = mutation
  schema_defn.subscription = subscription
  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
  schema_defn.disable_introspection_entry_points = disable_introspection_entry_points?

  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
  all_instrumenters.each do |step, insts|
    insts.each do |inst|
      schema_defn.instrumenters[step] << inst
    end
  end
  lazy_classes.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

  if plugins.any?
    schema_plugins = plugins
    # TODO don't depend on .define
    schema_defn = schema_defn.redefine do
      schema_plugins.each do |plugin, options|
        if options.any?
          use(plugin, **options)
        else
          use(plugin)
        end
      end
    end
  end
  # Do this after `plugins` since Interpreter is a plugin
  if schema_defn.query_execution_strategy != GraphQL::Execution::Interpreter
    schema_defn.instrumenters[:query] << GraphQL::Schema::Member::Instrumentation
  end
  schema_defn.send(:rebuild_artifacts)

  schema_defn
end

.tracer(new_tracer) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1064

def tracer(new_tracer)
  own_tracers << new_tracer
end

.tracers ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1068

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 1026

def type_error(type_err, ctx)
  DefaultTypeError.call(type_err, ctx)
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 1022

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 1006

def unauthorized_object(unauthorized_error)
  nil
end

.use(plugin, options = {}) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 738

def use(plugin, options = {})
  own_plugins << [plugin, options]
end

.visible?(member, context) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 971

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

Instance Method Details

#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 1196

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)
  • only (<#call(member, ctx)>)
  • except (<#call(member, ctx)>)

Returns:

  • (Hash) —

    GraphQL result



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# File 'lib/graphql/schema.rb', line 689

def as_json(only: nil, except: nil, context: {})
  execute(Introspection::INTROSPECTION_QUERY, only: only, except: except, context: context).to_h
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 504

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 160

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

#define(**kwargs, &block) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 279

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

  @definition_error = nil
  nil
rescue StandardError => err
  if @raise_definition_error || err.is_a?(CyclicalDefinitionError)
    raise
  else
    # Raise this error _later_ to avoid messing with Rails constant loading
    @definition_error = err
  end
  nil
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 354

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 472

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 404

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 415

def get_field(parent_type, field_name)
  with_definition_error_check do
    parent_type_name = case parent_type
    when GraphQL::BaseType
      parent_type.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 441

def get_fields(type)
  @instrumented_field_map[type.graphql_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 621

def id_from_object(object, type, ctx)
  if @id_from_object_proc.nil?
    raise(NotImplementedError, "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 630

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 219

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 215

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 303

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 208

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 328

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 665

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 660

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 390

def multiplex(queries, **kwargs)
  with_definition_error_check {
    GraphQL::Execution::Multiplex.run_all(self, queries, **kwargs)
  }
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 554

def object_from_id(id, ctx)
  if @object_from_id_proc.nil?
    raise(NotImplementedError, "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 563

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 607

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 612

def parse_error=(new_proc)
  @parse_error_proc = new_proc
end

#possible_types(type_defn) ⇒ 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 452

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

#references_to(type_name) ⇒ Hash

Returns a list of Arguments and Fields referencing a certain type

Parameters:

  • type_name (String)

Returns:

  • (Hash) 


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# File 'lib/graphql/schema.rb', line 338

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

#remove_handler(*args, &block) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 251

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 247

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 492

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(NotImplementedError, "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 545

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 459

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 311

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 1227

def sync_lazy(value)
  self.class.sync_lazy(value) { |v|
    lazy_method = lazy_method_name(v)
    if lazy_method
      synced_value = value.public_send(lazy_method)
      sync_lazy(synced_value)
    else
      v
    end
  }
end

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

Return the GraphQL IDL for the schema

Parameters:

  • context (Hash)
  • only (<#call(member, ctx)>)
  • except (<#call(member, ctx)>)

Returns:

  • (String) 


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# File 'lib/graphql/schema.rb', line 674

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 680

def to_document
  GraphQL::Language::DocumentFromSchemaDefinition.new(self).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 696

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 587

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 592

def type_error=(new_proc)
  @type_error_proc = new_proc
end

#type_from_ast(ast_node) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 445

def type_from_ast(ast_node)
  GraphQL::Schema::TypeExpression.build_type(self.types, 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 320

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 346

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 255

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 265

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