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。虽然我使用Sequelize与SQL数据库，但是直接从我的graphql 之外的服务器使用它是错误的解决函数。如何从与其定义的服务器相同的服务器中查询我的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?

这是我设置graphql端点的方式：

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
    }
  }
`)

如何创建此查询功能？

推荐答案

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端点的帮助器。

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 ，它将返回一个Promise，它将解析查询数据。

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);
})

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