How to access static methods of a class included in the consign in Nodejs?

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Hello. I am building an application with nodejs and I need to authenticate users by registering a new user and logging into the application. I’m using consign to perform autoload of my scripts, as you can see below

consign().include('app/routes').then('app/models').then('app/controllers').into(app);

My authentication class (Autenticacaodao.js) is inside the directory models and implemented as follows:

class AutenticacaoDAO {
    constructor() {
        this._instance;
    }
    static getStance() {
        if (!this._instance) {
            this._instance = new AutenticacaoDAO();
        }
        return this._instance;
    }
// Demais métodos
}
module.exports = function () {
    return AutenticacaoDAO;
}

As you can see, a static method that generates a new instance. When I try to access this method in my route appears the following error: Typeerror: Class constructor Autenticacaodao cannot be Invoked without 'new'

module.exports.home = function (application, req, res) {
    var auth = application.app.models.AutenticacaoDAO().getInstance();
}

The Node accuses error that I need a new to invoke the class, but since I am accessing a static method that returns the instance, not the need to instate the object. However, this same error does not occur when access class by require:

module.exports.home = function (application, req, res) {
    var auth = require('../models/AutenticacaoDAO')().getStance();
}

I would like to know how to access this method using the consign (since I don’t want to change the structure of the project). I’ve searched other forums for the answer to my problem but could not find the solution. Could anyone help me? if I could arrange the project in another way? I am new in Noode js and Avascript, so I still get lost in some concepts and any help will be welcome.

javascript node.js oop node-modules
  • 1

    But then if it’s a method estático the call shouldn’t be like this application.app.models.AutenticacaoDAO.getInstance();?

  • Yes, I thought the same thing. I made the method flame as you said, but now the following error occurs: Typeerror: application.app.models.AutenticaDAO.getInstance is not a Function

1 answer

1


You’re calling a function that doesn’t exist. As @Leandrade’s comment calls the method as follows:

module.exports.home = function (application, req, res) {
  var auth = application.app.models.AutenticacaoDAO.getStance();
}

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