Backbone relational - cannot instantiate more than one ,,,

Question

I have been using backbone relational (https://github.com/PaulUithol/Backbone-relational) to build my application because I have a model (Room) with lots of other models attached:

• Room has many Comment
• Room belongs to Location

As you can see in this issue I keep getting the error

Error: Cannot instantiate more than one Backbone.RelationalModel with the same id per type

Whenever I change View or reload a Collection.

Now I know there is a thread here where they suggest using findOrCreate but I am not accessing models individually, but am instead using Collection.fetch. Is there a way around this problem?

Pitcher

I had that problem... I don't knnow why but i deleted the reverse relation and problem solve by the moment... – Rivy

Ahh. I didn't configure the reverse relations... – Pitcher

Take a look at this: #12224622 – Koon

Answer 1

with backbone-relational you can get or create object from relational store. Use this to create relational objects:

this.model = someModel.findOrCreate({id: 123})

With this it will create new object or get existing one from relational store.

http://backbonerelational.org/#RelationalModel-findOrCreate

Play

This would work but the models are being fetched dynamically, by the Collections. – Pitcher

Answer 2

I had a similar problem, fixed it by switching to Backbone-associations.

https://github.com/dhruvaray/backbone-associations

The interface is almost exactly the same with only a few minor differences so porting should be pretty simple.

Delegacy

Answer 3

I had similar problem and it happend that I need to initialize model with function:

model: ->

   return new Project.Models.ModelName()

When you require_tree . in application.js then model files are loaded later than collection files (alphabetical order). Setting model with function waits until the app is executed.

Axolotl

I'm not quite sure what you mean... You mean before using Collection.fetch(), I should first instantiate a model? – Pitcher