Question

每次我调用查询或突变时，都会进行两次网络调用，然后转到创建的项目。我试图更改中间件，但仍然遇到相同的问题。 “ apollo-cache-memory”：“ ^ 1.2.2”， “ apollo-client”：“ ^ 2.3.2”， “ apollo-link”：“ ^ 1.2.12”， “ apollo-link-context”：“ ^ 1.0.8”， “ apollo-upload-client”：“ ^ 11.0.0”，

我尝试减少中间件并更改一些软件包，但仍然遇到相同的问题。

import { ApolloClient } from 'apollo-client'
import { InMemoryCache } from 'apollo-cache-inmemory'
import { appConfig } from 'config'
import { ApolloLink, from } from 'apollo-link'
import { logger } from 'libs/logger'
import { fetchKeyFromSession } from 'libs/session'
import { AUTHENTICATION_TOKEN } from 'constants/index'
import { createUploadLink } from 'apollo-upload-client'

const authMiddleware = new ApolloLink((operation, forward) => {
  logger(
    'GraphQL Interceptor ==>> ',
    operation.query.definitions[0].selectionSet.selections[0].name.value,
    window.location.pathname,
    operation.query.definitions[0].selectionSet.selections[0].arguments,
    window.location.pathname,
    operation.query.definitions[0].selectionSet.selections[0].arguments.map(
      arg => arg && arg.value && arg.value.name.value,
    ),
  )

  operation.setContext({
    headers: {
      Authorization: `Bearer ${fetchKeyFromSession(AUTHENTICATION_TOKEN)}`
    }
  })

  forward(operation).subscribe({
    next: result => logger('Apollo Link Result ==>> ', result),
    error: error => logger('Apollo Link Error ==>> ', error.response),
  })



  return forward(operation)
})


const uploadLink = createUploadLink({ uri: `${appConfig.config.BASE_URL}/api/v1` })

const cache = new InMemoryCache()

const defaultOptions = {
  query: {
    fetchPolicy: 'no-cache',
    errorPolicy: 'all',
  },
}

export const client = new ApolloClient({
  link: from([authMiddleware, uploadLink]),
  cache,
  defaultOptions,
  queryDeduplication: false
})

它根本不会引发任何错误，但是它应该只调用一次查询/变异而不是两次。因此，我在数据库中创建了两个项目。

Answer 1

const authMiddleware = new ApolloLink((operation, forward) => {
  logger(
    'GraphQL Interceptor ==>> ',
    operation.query.definitions[0].selectionSet.selections[0].name.value,
    window.location.pathname,
    operation.query.definitions[0].selectionSet.selections[0].arguments,
    window.location.pathname,
    operation.query.definitions[0].selectionSet.selections[0].arguments.map(
      arg => arg && arg.value && arg.value.name.value,
    ),
  )

  operation.setContext({
    headers: {
      Authorization: `Bearer ${fetchKeyFromSession(AUTHENTICATION_TOKEN)}`
    }
  })

  return forward(operation)
})

forward（operation）.subscribe（）导致问题将其删除，它将开始正常工作。

Apollo客户程序调用每个突变并查询两次（反应）

1 个答案: