node.js - nodejs 7 中的async,await到底应该怎么用？

Question

我写的这个函数：

var mysql=require('promise-mysql');

var pool=mysql.createPool({});

async function query() {
    let rows= await pool.query('select * from test');
    
    return rows;
}



满以为会返回真正的记录，结果返回的还是一个promise对象，难道nodejs真的不能实现像java一样的同步代码了吗？

Answer 1

async will definitely return Promise. Adding await will return the direct result. However, await can only appear in async function...

So, the innermost async function must return a Promise (or a direct quantity, which will be encapsulated into a Promise), and the outermost layer must also get a Promise.