无法从 Apollo 服务器获取数据

Question

我卡住了。我无法从服务器获取数据。（服务器正在 100% 工作）。但我在请求数据时遇到了问题。

这是最小化代码：

import { ApolloClient, InMemoryCache, createHttpLink, ApolloProvider } from '@apollo/client'
import RepositoryList from './RepositoryList'

const httpLink = createHttpLink({
  uri: 'http://localhost:4000/graphql',
})

const createApolloClient = () => {
  return new ApolloClient({
    link: httpLink,
    cache: new InMemoryCache(),
  })
}

const apolloClient = createApolloClient()

export default App = () => {
  return(
    <ApolloProvider client={apolloClient}>
      <RepositoryList />
    </ApolloProvider>
  )
}

存储库列表：

import { useQuery, gql } from '@apollo/client'

const GET_REPOSITORIES = gql`
  query {
    repositories {
      fullName
      description
    }
  }
`

const RepositoryList = () => {
  const { data, error, loading } = useQuery(GET_REPOSITORIES)
  console.log('data', data) //log: undefined
  console.log('error', error) //log: [Error: Network request failed]
  console.log('loading', loading) //log: false
  return <></>
}

控制台给出未定义的数据，错误是：网络连接失败。我尝试继续 http://localhost:4000/graphql 和运行查询。一切正常

Answer 1

尝试将 http://localhost:4000 更改为 http://10.0.2.2:4000/

const httpLink = createHttpLink({
  uri: 'http://10.0.2.2:4000/graphql',
})

无法从 Apollo 服务器获取数据

Can not get data from Apollo server

apollo

reactjs

graphql

react-native

apollo-client