Python GraphQL与graphene应用

GraphQL查询语言。类型系统Schema定义。Query根查询。Mutation变更。Resolver解析器。graphene库实现。GraphQL与REST对比。动态数据获取。

import graphene

class User(graphene.ObjectType):
id = graphene.ID()
name = graphene.String()
age = graphene.Int()

class Query(graphene.ObjectType):
user = graphene.Field(User, id=graphene.ID(required=True))
users = graphene.List(User)

def resolve_user(root, info, id):
return User(id=id, name="Alice", age=30)

def resolve_users(root, info):
return [User(id=1, name="Alice", age=30),
User(id=2, name="Bob", age=25)]

class CreateUser(graphene.Mutation):
class Arguments:
name = graphene.String(required=True)
age = graphene.Int()
ok = graphene.Boolean()
user = graphene.Field(User)

def mutate(root, info, name, age=0):
return CreateUser(ok=True, user=User(id=3, name=name, age=age))

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

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

result = schema.execute('''{
users { id name age }
}''')
print(result.data)