how to return in connection.query-CodePudding

I have a problem... I wanted to return "A" but The result was "B" I don't know what to do Please help me

my code:

async function getID(){

    let sql = 'SELECT * from id'

    connection.query(sql, (err, rows) => {
        if (err)
            throw err;

        console.log(rows)
        return "A"
        // return rows

    })
    return "B"
}

let list = getCredit();
list.then(console.log);
console.log(list)

My results

    [2022/06/13 21:34:29.548] Promise { 'B' }
    [2022/06/13 21:34:29.549] B

CodePudding user response：

You are mixing here callback with promises. To reach what you want, wrap your function in a promise:

function getID(){
  return new Promise((resolve, reject) => {

    let sql = 'SELECT * from id'

    connection.query(sql, (err, rows) => {
        if (err){
           reject(err)
        }else{
           resolve(rows);
        }
    })

  })
}

let list = getCredit();
list.then(console.log);
console.log(list)