如何从服务器执行 GraphQL 查询

问题描述

我正在使用 graphql-express 创建一个端点，我可以在其中执行 graphql 查询.虽然我将 Sequelize 与 SQL 数据库一起使用，但直接从我的 graphql 之外的服务器使用它感觉不对 resolve功能.如何从定义的同一服务器上查询我的 graphql API?

I am using graphql-express to create an endpoint where I can execute graphql queries in. Although I am using Sequelize with a SQL database it feels wrong to use it directly from the server outside of my graphql resolve functions. How do I go about querying my graphql API from the same server as it was defined in?

这是我如何设置我的 graphql 端点:

This is how I set up my graphql endpoint:

const express = require('express');
const router = express.Router();
const graphqlHTTP = require('express-graphql');
const gqlOptions = {
   schema: require('./schema')
};
router.use('/', graphqlHTTP(gqlOptions));

modules.exports = router;

基本上我想要的是能够做这样的事情:

Basically what I want is to be able to do something like this:

query(`
  {
    user(id: ${id}) {
      name
    }
  }
`)

我将如何创建这个 query 函数?

How would I create this query function?

推荐答案

GraphQL.js 本身不需要运行 http 服务器.express-graphql 只是将查询解析器挂载到 http 端点的助手.

GraphQL.js itself does not require a http server to run. express-graphql is just a helper to mount the query resolver to a http endpoint.

您可以将架构和查询传递给 graphql，它会返回一个 Promise，它将查询解析为数据.

You can pass your schema and the query to graphql, it'll return a Promise that'll resolve the query to the data.

graphql(schema, query).then(result => {
  console.log(result);
});

所以:

const {graphql} = require('graphql');
const schema = require('./schema');
function query (str) {
  return graphql(schema, str);
}

query(`
  {
    user(id: ${id}) {
      name
    }
  }
`).then(data => {
  console.log(data);
})

这篇关于如何从服务器执行 GraphQL 查询的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！