shareable.py

import graphene
from graphene import Interface

from graphene_federation.shareable import shareable

from graphene_federation import LATEST_VERSION, build_schema


@shareable
class Position(graphene.ObjectType):
    x = graphene.Int(required=True)
    y = shareable(graphene.Int(required=True))


@shareable
class Human(graphene.ObjectType):
    name = graphene.String()
    born_in = graphene.String()


@shareable
class Droid(graphene.ObjectType):
    name = shareable(graphene.String())
    primary_function = graphene.String()


@shareable
class Starship(graphene.ObjectType):
    name = graphene.String()
    length = shareable(graphene.Int())


@shareable
class SearchResult(graphene.Union):
    class Meta:
        types = (Human, Droid, Starship)


class Query(graphene.ObjectType):
    position = graphene.Field(Position)


schema = build_schema(Query, federation_version=LATEST_VERSION, types=(SearchResult,))

query = """
    query getSDL {
      _service {
         sdl
      }
    }
"""
result = schema.execute(query)
print(result.data)
# {'_service': {'sdl': 'extend schema @link(url: "https://specs.apollo.dev/federation/v2.0", import: ["@shareable"])\ntype Query {\n  position: Position\n}\n\ntype Position  @shareable {\n  x: Int!\n  y: Int! @shareable\n}'}}