石墨烯Python突变列表输入

import graphene
from graphene import ObjectType, String, Int, List, Field
from myapp.models import User as UserModel

class UserInput(graphene.InputObjectType):
    name = String(required=True)
    age = Int(required=True)

class CreateUser(graphene.Mutation):
    class Arguments:
        users = List(UserInput, required=True)

    Output = List(lambda: UserType)

    def mutate(self, info, users):
        created_users = []
        for user in users:
            new_user = UserModel(name=user.name, age=user.age)
            new_user.save()
            created_users.append(new_user)
        return CreateUser(users=created_users)

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

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

schema = graphene.Schema(mutation=Mutation)

from django.db import transaction

class CreateUser(graphene.Mutation):
    # ... (其他代码保持不变)

    @transaction.atomic
    def mutate(self, info, users):
        created_users = []
        errors = []
        for user in users:
            if UserModel.objects.filter(name=user.name).exists():
                errors.append(f"User with name {user.name} already exists.")
            else:
                new_user = UserModel(name=user.name, age=user.age)
                new_user.save()
                created_users.append(new_user)
        if errors:
            raise Exception(errors)
        return CreateUser(users=created_users)