Class: GraphQL::Schema

Inherits:
Object
  • Object
show all
Extended by:
FindInheritedValue, Member::HasAstNode
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/addition.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/validator.rb,
lib/graphql/schema/enum_value.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/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/directive/feature.rb,
lib/graphql/schema/directive/flagged.rb,
lib/graphql/schema/directive/include.rb,
lib/graphql/schema/member/build_type.rb,
lib/graphql/schema/member/has_fields.rb,
lib/graphql/schema/invalid_type_error.rb,
lib/graphql/schema/unique_within_type.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/has_directives.rb,
lib/graphql/schema/member/has_interfaces.rb,
lib/graphql/schema/member/has_validators.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/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/validator/format_validator.rb,
lib/graphql/schema/validator/length_validator.rb,
lib/graphql/schema/validator/required_validator.rb,
lib/graphql/schema/member/has_deprecation_reason.rb,
lib/graphql/schema/validator/exclusion_validator.rb,
lib/graphql/schema/validator/inclusion_validator.rb,
lib/graphql/schema/validator/allow_null_validator.rb,
lib/graphql/schema/validator/allow_blank_validator.rb,
lib/graphql/schema/member/has_unresolved_type_error.rb,
lib/graphql/schema/validator/numericality_validator.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

Direct Known Subclasses

Query::NullContext::NullSchema

Defined Under Namespace

Modules: Base64Encoder, BuildFromDefinition, FindInheritedValue, Interface, Loader, NullMask, ResolveTypeWithType, TypeExpression, UniqueWithinType Classes: Addition, Argument, Directive, DuplicateNamesError, DuplicateTypeNamesError, Enum, EnumValue, Field, FieldExtension, Finder, InputObject, IntrospectionSystem, InvalidDocumentError, InvalidTypeError, LateBoundType, List, Member, Mutation, NonNull, Object, Printer, RelayClassicMutation, Resolver, Scalar, Subscription, Timeout, TypeMembership, Union, UnresolvedLateBoundTypeError, Validator, Warden, Wrapper

Constant Summary collapse

NEW_HANDLER_HASH = 
->(h, k) {
  h[k] = {
    class: k,
    handler: nil,
    subclass_handlers: Hash.new(&NEW_HANDLER_HASH),
   }
}
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

Class Method Summary collapse

Methods included from Member::HasAstNode

ast_node

Class Attribute Details

.analysis_engine ⇒ Object 



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# File 'lib/graphql/schema.rb', line 582

def analysis_engine
  @analysis_engine || find_inherited_value(:analysis_engine, self.default_analysis_engine)
end

.connections ⇒ GraphQL::Pagination::Connections

Returns if installed.

Returns:



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# File 'lib/graphql/schema.rb', line 275

def connections
  if defined?(@connections)
    @connections
  else
    inherited_connections = find_inherited_value(:connections, nil)
    # This schema is part of an inheritance chain which is using new connections,
    # make a new instance, so we don't pollute the upstream one.
    if inherited_connections
      @connections = Pagination::Connections.new(schema: self)
    else
      nil
    end
  end
end

.dataloader_class ⇒ 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 405

def dataloader_class
  @dataloader_class || GraphQL::Dataloader::NullDataloader
end

.error_bubbling(new_error_bubbling = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 596

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

.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 594

def interpreter=(value)
  @interpreter = value
end

.max_complexity(max_complexity = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 570

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 608

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 133

def subscriptions
  @subscriptions
end

.validate_max_errors(new_validate_max_errors = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 558

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

.validate_timeout(new_validate_timeout = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 529

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

Class Method Details

.accessible?(member, ctx) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 786

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

.add_subscription_extension_if_necessary ⇒ 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 975

def add_subscription_extension_if_necessary
  if !defined?(@subscription_extension_added) && subscription && self.subscriptions
    @subscription_extension_added = true
    subscription.all_field_definitions.each do |field|
      field.extension(Subscriptions::DefaultSubscriptionResolveExtension)
    end
  end
end

.after_any_lazies(maybe_lazies) ⇒ 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.

Return a lazy if any of maybe_lazies are lazy, otherwise, call the block eagerly and return the result.

Parameters:

  • maybe_lazies (Array) 


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# File 'lib/graphql/schema.rb', line 1032

def after_any_lazies(maybe_lazies)
  if maybe_lazies.any? { |l| lazy?(l) }
    GraphQL::Execution::Lazy.all(maybe_lazies).then do |result|
      yield result
    end
  else
    yield maybe_lazies
  end
end

.after_lazy(value, &block) ⇒ 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 992

def after_lazy(value, &block)
  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, &block)
    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 147

def as_json(only: nil, except: nil, context: {})
  execute(Introspection.query(include_deprecated_args: true), 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 686

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 488

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

.default_analysis_engine ⇒ Object 



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# File 'lib/graphql/schema.rb', line 678

def default_analysis_engine
  if superclass <= GraphQL::Schema
    superclass.default_analysis_engine
  else
    @default_analysis_engine ||= GraphQL::Analysis::AST
  end
end

.default_directives ⇒ Object 



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# File 'lib/graphql/schema.rb', line 883

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

.default_execution_strategy ⇒ Object 



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# File 'lib/graphql/schema.rb', line 670

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

.default_filter ⇒ Object 



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# File 'lib/graphql/schema.rb', line 185

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 189

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 495

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

.deprecated_graphql_definition ⇒ Object 



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# File 'lib/graphql/schema.rb', line 128

def deprecated_graphql_definition
  graphql_definition(silence_deprecation_warning: true)
end

.description(new_description = nil) ⇒ String?

Returns:

  • (String, nil) 


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# File 'lib/graphql/schema.rb', line 167

def description(new_description = nil)
  if new_description
    @description = new_description
  elsif defined?(@description)
    @description
  else
    find_inherited_value(:description, nil)
  end
end

.directive(new_directive) ⇒ Object

Attach a single directive to this schema

Parameters:

  • new_directive (Class)

Returns:

  • void



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# File 'lib/graphql/schema.rb', line 879

def directive(new_directive)
  add_type_and_traverse(new_directive, root: false)
end

.directives(*new_directives) ⇒ Object

Add several directives at once

Parameters:

  • new_directives (Class) 


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

def directives(*new_directives)
  if new_directives.any?
    new_directives.flatten.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 618

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 636

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 624

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 644

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 630

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 652

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

.error_handlers ⇒ Object 



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# File 'lib/graphql/schema.rb', line 708

def error_handlers
  @error_handlers ||= {
    class: nil,
    handler: nil,
    subclass_handlers: Hash.new(&NEW_HANDLER_HASH),
  }
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 926

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 177

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: nil, parser: GraphQL.default_parser, 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: nil) —

    A callable for handling field resolution

  • parser (Object) (defaults to: GraphQL.default_parser) —

    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)

Returns:

  • (Class) —

    the schema described by document



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# File 'lib/graphql/schema.rb', line 109

def from_definition(definition_or_path, default_resolve: nil, parser: GraphQL.default_parser, using: {})
  # If the file ends in `.graphql`, treat it like a filepath
  if definition_or_path.end_with?(".graphql")
    GraphQL::Schema::BuildFromDefinition.from_definition_path(
      definition_or_path,
      default_resolve: default_resolve,
      parser: parser,
      using: using,
    )
  else
    GraphQL::Schema::BuildFromDefinition.from_definition(
      definition_or_path,
      default_resolve: default_resolve,
      parser: parser,
      using: using,
    )
  end
end

.from_introspection(introspection_result) ⇒ Class<GraphQL::Schema>

Create schema with the result of an introspection query.

Parameters:

Returns:



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# File 'lib/graphql/schema.rb', line 99

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

.get_field(type_or_name, field_name, context = GraphQL::Query::NullContext) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 443

def get_field(type_or_name, field_name, context = GraphQL::Query::NullContext)
  parent_type = case type_or_name
  when LateBoundType
    get_type(type_or_name.name, context)
  when String
    get_type(type_or_name, context)
  when Module
    type_or_name
  else
    raise GraphQL::InvariantError, "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, context))
    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, context = GraphQL::Query::NullContext) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 466

def get_fields(type, context = GraphQL::Query::NullContext)
  type.fields(context)
end

.get_type(type_name, context = GraphQL::Query::NullContext) ⇒ 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 242

def get_type(type_name, context = GraphQL::Query::NullContext)
  local_entry = own_types[type_name]
  type_defn = case local_entry
  when nil
    nil
  when Array
    visible_t = nil
    warden = Warden.from_context(context)
    local_entry.each do |t|
      if warden.visible_type?(t, context)
        if visible_t.nil?
          visible_t = t
        else
          raise DuplicateNamesError, "Found two visible type definitions for `#{type_name}`: #{visible_t.inspect}, #{t.inspect}"
        end
      end
    end
    visible_t
  when Module
    local_entry
  else
    raise "Invariant: unexpected own_types[#{type_name.inspect}]: #{local_entry.inspect}"
  end

  type_defn ||
    introspection_system.types[type_name] || # todo context-specific introspection?
    (superclass.respond_to?(:get_type) ? superclass.get_type(type_name, context) : nil)
end

.handle_or_reraise(context, err) ⇒ 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 717

def handle_or_reraise(context, err)
  handler = Execution::Errors.find_handler_for(self, err.class)
  if handler
    runtime_info = context.namespace(:interpreter) || {}
    obj = runtime_info[:current_object]
    args = runtime_info[:current_arguments]
    args = args && args.keyword_arguments
    field = runtime_info[:current_field]
    if obj.is_a?(GraphQL::Schema::Object)
      obj = obj.object
    end
    handler[:handler].call(err, obj, args, context, field)
  else
    raise err
  end
end

.id_from_object(object, type, ctx) ⇒ Object

Raises:



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# File 'lib/graphql/schema.rb', line 778

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 798

def inaccessible_fields(error)
  error
end

.inherited(child_class) ⇒ Object

rubocop:enable Lint/DuplicateMethods



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# File 'lib/graphql/schema.rb', line 766

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 862

def instrument(instrument_step, instrumenter, options = {})
  own_instrumenters[instrument_step] << instrumenter
end

.instrumenters ⇒ Object 



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

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 590

def interpreter?
  true
end

.introspection(new_introspection_namespace = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 470

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 480

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 1024

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 with #lazy_resolve.

Returns:

  • (Symbol, nil) —

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



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# File 'lib/graphql/schema.rb', line 1019

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 858

def lazy_resolve(lazy_class, value_method)
  lazy_methods.set(lazy_class, value_method)
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 963

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

.multiplex_analyzer(new_analyzer) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 907

def multiplex_analyzer(new_analyzer)
  own_multiplex_analyzers << new_analyzer
end

.multiplex_analyzers ⇒ Object 



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# File 'lib/graphql/schema.rb', line 911

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 308

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 511

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 290

def new_connections?
  !!connections
end

.object_from_id(node_id, ctx) ⇒ Object

Raises:



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# File 'lib/graphql/schema.rb', line 774

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 660

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)
    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 854

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

.plugins ⇒ Object 



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# File 'lib/graphql/schema.rb', line 210

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 359

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
      stored_possible_types = own_possible_types[type.graphql_name]
      visible_possible_types = if stored_possible_types && type.kind.interface?
        stored_possible_types.select do |possible_type|
          possible_type.interfaces(context).include?(type)
        end
      else
        stored_possible_types
      end
      visible_possible_types ||
        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 294

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 899

def query_analyzer(new_analyzer)
  own_query_analyzers << new_analyzer
end

.query_analyzers ⇒ Object 



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# File 'lib/graphql/schema.rb', line 903

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 503

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

.query_stack_error(query, err) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 984

def query_stack_error(query, err)
  query.context.errors.push(GraphQL::ExecutionError.new("This query is too large to execute."))
end

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



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# File 'lib/graphql/schema.rb', line 411

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 694

def rescue_from(*err_classes, &handler_block)
  err_classes.each do |err_class|
    Execution::Errors.register_rescue_from(err_class, error_handlers[:subclass_handlers], handler_block)
  end
end

.resolve_type(type, obj, ctx) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 757

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:

  • (GraphQL::ObjectType, nil)

See Also:

  • Restricted access to root types


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# File 'lib/graphql/schema.rb', line 339

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 352

def root_types
  @root_types
end

.sanitized_printer(new_sanitized_printer = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 915

def sanitized_printer(new_sanitized_printer = nil)
  if new_sanitized_printer
    @own_sanitized_printer = new_sanitized_printer
  else
    @own_sanitized_printer || GraphQL::Language::SanitizedPrinter
  end
end

.static_validator ⇒ Object 



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# File 'lib/graphql/schema.rb', line 197

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 322

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_subscription_extension_if_necessary
      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 519

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

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.

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 1008

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 156

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 162

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:

  • {{#as_json}


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# File 'lib/graphql/schema.rb', line 138

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 891

def tracer(new_tracer)
  own_tracers << new_tracer
end

.tracers ⇒ Object 



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# File 'lib/graphql/schema.rb', line 895

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

.type_error(type_error, ctx) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 837

def type_error(type_error, ctx)
  case type_error
  when GraphQL::InvalidNullError
    ctx.errors << type_error
  when GraphQL::UnresolvedTypeError, GraphQL::StringEncodingError, GraphQL::IntegerEncodingError
    raise type_error
  when GraphQL::IntegerDecodingError
    nil
  end
end

.type_from_ast(ast_node, context: nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 438

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(context = GraphQL::Query::NullContext) ⇒ 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 217

def types(context = GraphQL::Query::NullContext)
  all_types = non_introspection_types.merge(introspection_system.types)
  visible_types = {}
  all_types.each do |k, v|
    visible_types[k] =if v.is_a?(Array)
      visible_t = nil
      v.each do |t|
        if t.visible?(context)
          if visible_t.nil?
            visible_t = t
          else
            raise DuplicateNamesError, "Found two visible type definitions for `#{k}`: #{visible_t.inspect}, #{t.inspect}"
          end
        end
      end
      visible_t
    else
      v
    end
  end
  visible_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 833

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 817

def unauthorized_object(unauthorized_error)
  nil
end

.union_memberships(type = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 388

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 201

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 586

def using_ast_analysis?
  true
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 542

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, timeout: validate_timeout, max_errors: validate_max_errors)
  res[:errors]
end

.visible?(member, ctx) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 782

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