7.3 クエリとミューテーションの定義 #

from graphene import ObjectType, String, Schema, Field, Mutation

class User(ObjectType):
    id = String()
    name = String()

class Query(ObjectType):
    user = Field(User, id=String(required=True))

    def resolve_user(self, info, id):
        # ここでDBからユーザー情報を取得する処理を書きます
        return User(id=id, name="John Doe") # 仮のデータ

class CreateUser(Mutation):
    class Arguments:
        name = String(required=True)

    user = Field(User)

    def mutate(self, info, name):
        # ここでDBに新しいユーザーを保存する処理を書きます
        return CreateUser(user=User(id="2", name=name)) # 仮のデータ

class Mutation(ObjectType):
    create_user = CreateUser.Field()

schema = Schema(query=Query, mutation=Mutation)

from flask import Flask
from flask_graphql import GraphQLView

app = Flask(__name__)
app.add_url_rule('/graphql', view_func=GraphQLView.as_view('graphql', schema=schema, graphiql=True))

if __name__ == '__main__':
    app.run()

query {
  user(id: "1") {
    name
  }
}

mutation {
  createUser(name: "Jane Doe") {
    user {
      id
      name
    }
  }
}