Clash Royale CLAN TAG#URR8PPP

bind value of callack to property of instance nodejs

I want to permanently store a result of a callback function, here is the code:

class constants
constructor()
this.acquire()


acquire()
this.last_refresh = new Date().getDate();
require('./db_slave').then(conn =>
return conn.query("SELECT table_name FROM information_schema.tables where table_schema='gen'").then(result =>
this.tables = result
console.log(result)
);
).catch(err =>
// handle error here
);


tables()
this.refresh()
return this.tables

refresh() if (new Date().getDate() != this.last_refresh) this.acquire()


module.exports = constants


but this is obviously not working because this.tables = result doesnt do anything...

this.tables = result

Here is the file that is being called by this promise:

var mysql = require('promise-mysql');
var db = require('./db')

module.exports = mysql.createConnection(
host: db.host,
user: db.user,
password: db.password
).then(conn =>
console.log("connected to the DB");
return conn;
).catch(err =>
console.log("error connecting to the DB", err);
throw err;
);


How do i permanently store the result in that callback?

here is how i used these:

var db_constants = require('./database_service/db_constants')

let cons = new db_constants()

console.log(cons.tables())


this.tables = result

this.tables

results

db_tables

const x = new db_tables;

acquire

x.acquire()

this.tables = result

tables()

cons.then(tables => console.log(tables))

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