Vue.js Apollo 客户端在向服务器发送Mutations 时返回400(错误请求)错误

我目前正在使用Apollo客户端的vue-apollo包，其中包含VueJs堆栈和django，graphene python用于我的GraphQl API.

我对vue apollo有一个简单的设置，如下所示:

import Vue from 'vue'
import { ApolloClient } from 'apollo-client'
import { HttpLink } from 'apollo-link-http'
import { InMemoryCache } from 'apollo-cache-inmemory'
import VueApollo from 'vue-apollo'
import Cookies from 'js-cookie'


const httpLink = new HttpLink({
  credentials: 'same-origin',
  uri: 'http://localhost:8000/api/',
})

// Create the apollo client
const apolloClient = new ApolloClient({
  link: httpLink,
  cache: new InMemoryCache(),
  connectToDevTools: true,
})

export const apolloProvider = new VueApollo({
  defaultClient: apolloClient,
})

// Install the vue plugin
Vue.use(VueApollo)

我也在Django settings.py上安装了CORS和django-cors-headers软件包.当我使用graphiQL或用于chrome的失眠API客户端时，所有的查询和Mutations 都能很好地解决，但在我的vue应用程序中try 以下Mutations :

'''

import gql from "graphql-tag";
import CREATE_USER from "@/graphql/新用户.gql";

export default {
  data() {
    return {
      test: ""
    };
  },
  methods: {
    authenticateUser() {
      this.$apollo.mutate({
        mutation: CREATE_USER,
        variables: {
          email: "test@example.com",
          password: "pa$$word",
          username: "testuser"
        }
      }).then(data => {
          console.log(result)
      })
    }
  }
};

新用户.gql

mutation createUser($email: String!, $password: String!, $username: String!) {
  createUser (username: $name, password: $password, email: $email)
  user {
    id
    username
    email
    password
  }
}

返回以下错误响应:

POST http://localhost:8000/api/ 400 (Bad Request)

ApolloError.js?d4ec:37 Uncaught (in promise) Error: Network error: Response not successful: Received status code 400

然而，在我的vue应用程序中，常规查询可以很好地解决正确的响应，除了Mutations ，所以这让我非常困惑