Apollo客户端调用每个变异和查询两次(React)

Question

每次我调用一个查询或一个变体时，它都会进行两次网络调用，然后我就会得到已创建的项。我尝试更改中间件，但仍然遇到相同的问题。"apollo-cache-inmemory"："^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"，

我已经尝试减少中间件和更改一些包，但仍然得到相同的问题。

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
})

它根本没有抛出任何错误，但它应该只调用一次查询/突变，而不是两次。由于这个原因，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)
})

转发(操作).subscribe()导致问题删除它，它将开始正常工作。

Answer 2

这是subscribe的替代方案

forward(operation).forEach((data) => {
  data.errors?.forEach((error) => logger('Apollo Link Error ==>> ', error.response));
});