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absinthe_federation

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Apollo Federation support for Absinthe

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absinthe_federation lib absinthe federation schema service_field.ex
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lib/absinthe/federation/schema/service_field.ex 

defmodule Absinthe.Federation.Schema.ServiceField do

  @moduledoc false



  alias Absinthe.Blueprint.Schema.FieldDefinition

  alias Absinthe.Blueprint.TypeReference.NonNull

  alias Absinthe.Schema.Notation



  def build() do

    %FieldDefinition{

      __reference__: Notation.build_reference(__ENV__),

      description: """

      The _service field on the query root returns SDL

      which includes all of the service's types (after any non-federation transforms),

      as well as federation directive annotations on the fields and types.

      The federation schema modifications (i.e. new types and directive definitions)

      should not be included in this SDL.

      """,

      identifier: :_service,

      module: __MODULE__,

      name: "_service",

      type: %NonNull{

        of_type: :_service

      },

      middleware: [{Absinthe.Resolution, &__MODULE__.resolver/3}]

    }

  end



  def resolver(_parent, _args, %{schema: schema} = _resolution) do

    {:ok, %{sdl: Absinthe.Federation.to_federated_sdl(schema)}}

  end

end