Loopback models can be extended by adding custom methods to them. A method can be:

  • Model Method: the method is available on Model itself.
  • Instance Method: the method is available on an instance of the model.

Model JS file⌗

// Model.js
module.exports = function(Model) {

  // Model Method
  Model.method = function() {
    ...
  }
  
  // Instance Method
  Model.prototype.method = function() {
    ...
  }
}

// Model method
var Model = app.models.Model;
Model.method();

// Instance Method
var instance = new Model();
instance.method();