Method: GraphQL::Schema::Loader#load

Defined in:
lib/graphql/schema/loader.rb

#load(introspection_result) ⇒ Class

Create schema with the result of an introspection query.

Parameters:

Returns:

  • (Class) —

    the schema described by input



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# File 'lib/graphql/schema/loader.rb', line 16

def load(introspection_result)
  schema = introspection_result.fetch("data").fetch("__schema")

  types = {}
  type_resolver = ->(type) { resolve_type(types, type) }

  schema.fetch("types").each do |type|
    next if type.fetch("name").start_with?("__")
    type_object = define_type(type, type_resolver)
    types[type["name"]] = type_object
  end

  directives = []
  schema.fetch("directives", []).each do |directive|
    next if GraphQL::Schema.default_directives.include?(directive.fetch("name"))
    directives << define_directive(directive, type_resolver)
  end

  Class.new(GraphQL::Schema) do
    add_type_and_traverse(types.values, root: false)
    orphan_types(types.values.select { |t| t.kind.object? })
    directives(directives)
    description(schema["description"])

    def self.resolve_type(*)
      raise(GraphQL::RequiredImplementationMissingError, "This schema was loaded from string, so it can't resolve types for objects")
    end

    [:query, :mutation, :subscription].each do |root|
      type = schema["#{root}Type"]
      if type
        type_defn = types.fetch(type.fetch("name"))
        self.public_send(root, type_defn)
      end
    end
  end
end