在 NODEJS 中获取 PROMISE OBJECT 值

Question

我有一个 nodejs 函数，它返回以下查询的值。该函数将值作为对象返回。我如何从 Promise 对象中获取值？当我尝试打印该值时，它打印为“ [object Promise]”

SELECT IF(COUNT(*) > 0, 'true', 'false') AS MYVAL FROM MY_TABLE_STATUS WHERE ID = '100'

Answer 1

global.mysql = require('mysql');
global.mySqlConnection = mysql.createConnection({
  host: 'localhost',
  port:3306,
  user: 'root',
  password: 'password',
  database: 'db_name'
});


async getData()=>{
       var myPromise = () => {
        return new Promise((resolve, reject) => {
             mySqlConnection.query("SELECT IF(COUNT(*) > 0, 'true', 'false') AS MYVAL FROM MY_TABLE_STATUS WHERE ID = ?",[100],(err, result) => {
                     error ? reject(error) : resolve(results);
             });
        });
       }
   var result = await (myPromise());
   console.log('result ==',result);
   mySqlConnection.destroy();
   return result;
}