如何使用Relay发送一次性查询？

Question

I'm trying to send a one-off query using Relay. So, I don't necessarily want to use QueryRenderer but rather have a simple API to send a query without binding the result to a React component.

Previously, this was possible with the fetch method on network :

const checkVoteQueryText = `
  query CheckVoteQuery($userId: ID!, $linkId: ID!) {
    viewer {
      allVotes(filter: {
        user: { id: $userId },
        link: { id: $linkId }
      }) {
        edges {
          node {
            id
          }
        }
      }
    }
  }`
const checkVoteQuery = { text: checkVoteQueryText }
const result = await this.props.relay.environment._network.fetch(checkVoteQuery, {userId, linkId})

It seems however that fetch has been deprecated in some newer version of Relay. Is there an alternative that can be used now?

If Relay doesn't allow for one-off queries, I'd probably just graphql-request or plain JS fetch to get the job done. But it would be nice to be able to use Relay for this as it already knows my endpoint.

Answer 1

Ah this was actually rather simple to achieve. In fact, calling fetch on this.props.relay.environment._network only reused the function that's passed into the Network when it's created. So, it's possible to just reuse this function, in my case it's called fetchQuery :

Environment.js

import {GC_AUTH_TOKEN} from './constants'
import { SubscriptionClient } from 'subscriptions-transport-ws'

const {
  Environment,
  Network,
  RecordSource,
  Store,
} = require('relay-runtime')

const store = new Store(new RecordSource())

// Export it here so it can be reused in other files
export const fetchQuery = (operation, variables) => {
  return fetch('https://api.graph.cool/relay/v1/cj9h5g99s24fb0100nsp81d4y', {
    method: 'POST',
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${localStorage.getItem(GC_AUTH_TOKEN)}`
    },
    body: JSON.stringify({
      query: operation.text,
      variables,
    }),
  }).then(response => {
    return response.json()
  })
}

const network = Network.create(fetchQuery)

const environment = new Environment({
  network,
  store,
})

export default environm

ent