CODEWITHSUNDEEP
javascriptangularjsoop
ossys
ossys

Reputation: 4217

Angular Factory Self Referencing

What is the proper way to establish a self-referential pattern in Angular using factories? For example, if I have a parent-child relationship of the same type of object:

angular.module('app.factories')

.factory('PersonFactory', function(PersonFactory) {

  function Person(name) {
    this.name = name;

    this.mom = new PersonFactory('Frank');
    this.dad = new PersonFactory('Sue');
  }

  Person.prototype.getMom = function() {
    return this.mom;
  };

  Person.prototype.getDad = function() {
    return this.dad;
  };

  return Person;
});

This (obviously) is returning a circular dependency error.

Upvotes: 0

Views: 175

Answers (1)

Reactgular
Reactgular

Reputation: 54791

You can't create an object that creates itself in the constructor. Otherwise you get an infinite loop. The object should either take the parents as constructor parameters, or you add setters.

function Person(name, father, mother) {
   this.name = name;
   this.father = father;
   this.mother = mother;
}

var child = new Person("Timmy", new Person("Frank"), new Person("Sue");

You can use Person inside the factory declaration directly. It doesn't have to be injected.

function Person(name, parent) {
    this.name = name;
    if(!parent) {
        this.mom = new Person("Sue", true);
    }
}

var child = new Person("Timmy");

Upvotes: 3

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