Module: GraphQL::Schema::Interface::DefinitionMethods

Constant Summary

Constants included from Member::HasFields

Member::HasFields::CONFLICT_FIELD_NAMES, Member::HasFields::GRAPHQL_RUBY_KEYWORDS, Member::HasFields::RUBY_KEYWORDS

Instance Method Summary collapse

Methods included from Member::HasAstNode

#ast_node

Methods included from Member::Scoped

#scope_items

Methods included from Member::RelayShortcuts

#connection_type, #connection_type_class, #edge_type, #edge_type_class

Methods included from Member::HasPath

#path

Methods included from Member::HasFields

#add_field, #field, #field_class, #fields, #get_field, #global_id_field, #own_fields

Methods included from Member::TypeSystemHelpers

#list?, #non_null?, #to_list_type, #to_non_null_type, #to_type_signature

Methods included from Member::BaseDSLMethods

#authorized?, #default_graphql_name, #description, #graphql_name, #introspection, #introspection?, #mutation, #name, #overridden_graphql_name

Methods included from Relay::TypeExtensions

#connection_type, #define_connection, #define_edge, #edge_type

Methods included from Member::CachedGraphQLDefinition

#graphql_definition, #initialize_copy, #type_class

Instance Method Details

#accessible?(context) ⇒ Boolean

The interface is accessible if any of its possible types are accessible

Returns:


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# File 'lib/graphql/schema/interface.rb', line 32

def accessible?(context)
  context.schema.possible_types(self).each do |type|
    if context.schema.accessible?(type, context)
      return true
    end
  end
  false
end

#definition_methods(&block) ⇒ Object

Methods defined in this block will be:

  • Added as class methods to this interface
  • Added as class methods to all child interfaces

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# File 'lib/graphql/schema/interface.rb', line 22

def definition_methods(&block)
  self::DefinitionMethods.module_eval(&block)
end

#included(child_class) ⇒ Object

Here's the tricky part. Make sure behavior keeps making its way down the inheritance chain.


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# File 'lib/graphql/schema/interface.rb', line 50

def included(child_class)
  if !child_class.is_a?(Class)
    # In this case, it's been included into another interface.
    # This is how interface inheritance is implemented

    # We need this before we can call `own_interfaces`
    child_class.extend(Schema::Interface::DefinitionMethods)

    child_class.type_membership_class(self.type_membership_class)
    child_class.own_interfaces << self
    child_class.interfaces.reverse_each do |interface_defn|
      child_class.extend(interface_defn::DefinitionMethods)
    end

    # Use an instance variable to tell whether it's been included previously or not;
    # You can't use constant detection because constants are brought into scope
    # by `include`, which has already happened at this point.
    if !child_class.instance_variable_defined?(:@_definition_methods)
      defn_methods_module = Module.new
      child_class.instance_variable_set(:@_definition_methods, defn_methods_module)
      child_class.const_set(:DefinitionMethods, defn_methods_module)
      child_class.extend(child_class::DefinitionMethods)
    end
    child_class.introspection(introspection)
    child_class.description(description)
    if overridden_graphql_name
      child_class.graphql_name(overridden_graphql_name)
    end
    # If interfaces are mixed into each other, only define this class once
    if !child_class.const_defined?(:UnresolvedTypeError, false)
      add_unresolved_type_error(child_class)
    end
  elsif child_class < GraphQL::Schema::Object
    # This is being included into an object type, make sure it's using `implements(...)`
    backtrace_line = caller(0, 10).find { |line| line.include?("schema/object.rb") && line.include?("in `implements'")}
    if !backtrace_line
      raise "Attach interfaces using `implements(#{self})`, not `include(#{self})`"
    end
  end

  super
end

#kindObject


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# File 'lib/graphql/schema/interface.rb', line 121

def kind
  GraphQL::TypeKinds::INTERFACE
end

#orphan_types(*types) ⇒ Object


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# File 'lib/graphql/schema/interface.rb', line 93

def orphan_types(*types)
  if types.any?
    @orphan_types = types
  else
    all_orphan_types = @orphan_types || []
    all_orphan_types += super if defined?(super)
    all_orphan_types.uniq
  end
end

#to_graphqlObject


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# File 'lib/graphql/schema/interface.rb', line 103

def to_graphql
  type_defn = GraphQL::InterfaceType.new
  type_defn.name = graphql_name
  type_defn.description = description
  type_defn.orphan_types = orphan_types
  type_defn.type_membership_class = self.type_membership_class
  type_defn.ast_node = ast_node
  fields.each do |field_name, field_inst|
    field_defn = field_inst.graphql_definition
    type_defn.fields[field_defn.name] = field_defn
  end
  type_defn.[:type_class] = self
  if respond_to?(:resolve_type)
    type_defn.resolve_type = method(:resolve_type)
  end
  type_defn
end

#type_membership_class(membership_class = nil) ⇒ Object


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# File 'lib/graphql/schema/interface.rb', line 41

def type_membership_class(membership_class = nil)
  if membership_class
    @type_membership_class = membership_class
  else
    @type_membership_class || find_inherited_value(:type_membership_class, GraphQL::Schema::TypeMembership)
  end
end

#visible?(context) ⇒ Boolean

Returns:

See Also:

  • hides interfaces without visible implementations

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# File 'lib/graphql/schema/interface.rb', line 27

def visible?(context)
  true
end