Backbone relational, keep foreign key ids when using relations in models

Question

i have working example of code with relations, but there is a lack - backbone replaces my foreign id with related model, i would like to keep as foreign id and to add related model with new key.. is it possible?

In the following example engineId will be replaces with related model. Is it possible to keep as engineId as related model with key 'engine'?

window.Car = Backbone.RelationalModel.extend({
  defaults : {
    id     : null,
    brand  : null,
    engineId : null,
  }
});

window.Engine = Backbone.RelationalModel.extend({
  defaults : {
    id : null,
    type : null,
  },
  relations: [{
    type         : 'HasMany',
    key          : 'cars',
    relatedModel : 'Car',
    reverseRelation: {
      key: 'engineId',
    }
  }]
});

var engines = new Backbone.Collection([
  {id : 1, type : 'electric'},
  {id : 2, type : 'diesel'},
], {model: window.Engine});

var cars = new Backbone.Collection([
  {id : 1, brand : 'Toyota', engineId : 2},    
  {id : 2, brand : 'Ford', engineId : 2},    
  {id : 3, brand : 'Tesla', engineId : 1},    
], {model: window.Car});

cars.each(function(car){
  console.log(car.get('id'), car.get('brand'), car.get('engineId').get('type'));
});

Any solutions to this problem ? – Akshay Rawat Nov 04 '13 at 14:59 — Akshay Rawat, Nov 04 '13 at 14:59

score 0 · Answer 1 · answered Oct 03 '13 at 08:23

0

Is there any reason you can't just get the id from the Engine model? Eg.

car.engine.get('id')

answered Oct 03 '13 at 08:23

Andru

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Backbone relational, keep foreign key ids when using relations in models

1 Answers1