Sequelize Authentication cannot complete

Question

I'm starting out with node.js and sequelize and I get the following error:

/home/cbaket/test/test.js:9
    .complete(function(err) {
     ^
TypeError: undefined is not a function
    at Object.<anonymous> (/home/cbaket/test/test.js:9:6)
    at Module._compile (module.js:460:26)
    at Object.Module._extensions..js (module.js:478:10)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
    at Function.Module.runMain (module.js:501:10)
    at startup (node.js:129:16)
    at node.js:814:3

My file: test.js is:

var Sequelize = require('sequelize');
var sequelize = new Sequelize('apidb', 'apidb', 'apidb', {
    dialect: "mysql", // or 'sqlite', mysql', 'mariadb'
    port:    3306 // or 5432 (for postgres)
});

sequelize
    .authenticate()
    .complete(function(err) {
        if (!!err) {
            console.log('Unable to connect to the database:', err)
        } else {
            console.log('Connection has been established successfully.')
        }
    });

I'm following one of the early tutorials on the Sequelieze website.

I installed the latest sequelize and mysql with the following command.

$ npm install mysql  
$ npm install sequelize

I have tried a lot of similar examples and always get the same error. The libraries are working because other examples work fine, i could create tables in the database and get data from it but the authenticate function always fails.

Thanks! ;)

Answer 1

Authenticate returns a Promise in the later versions of sequelize: https://github.com/sequelize/sequelize/blob/2.0/lib/sequelize.js#L939

Read the bluebird documentation here as it is quite useful: https://github.com/petkaantonov/bluebird/blob/master/API.md

Something like this should work (make sure you check for connection errors...this is just a simple example):

var Sequelize = require('sequelize');
var sql = new Sequelize('DB', 'UNAME', 'PASS', {
    host: 'localhost',
    port: 3306,
    dialect: 'mysql'
});

var test = sql.authenticate()
    .then(function () {
        console.log("CONNECTED! ");
    })
    .catch(function (err) {
        console.log("SOMETHING DONE GOOFED");
    })
    .done();

Answer 2

Hi sequelize changed their auth scheme in latest release.. Please revert back to older version and try it

Answer 3

you were right!! ;) I just remove sequelize and then reinstall an old veriosn:

npm install [email protected]

and it works!!

I didn't found any info about that... Shouldn't they warn users from deprecated or modified functions ?¿?...

THANKS!! ;)