Question

When you override backbone sync, both model/collection .save()/fetch() uses the same backbone sync method, so what is the best way to check if what Backbone.sync recieves is a model or a collection of models?

As an example:

Backbone.sync = function(method, model, options){
  //Model here can be both a collection or a single model so
 if(model.isModel()) // there is no isModel or isCollection method
}

I suppose I am looking for a “safe” best practice, I could of course check for certain attributes or methods that only a model or a collection have, but it seems hackish, shouldn’t there be a better obvious way? And there probably is I just couldn’t find it.

Thanks!

Answer 1

You could also try instanceof like so:

Backbone.sync = function(method, model, options) {
  if (model instanceof Backbone.Model) {
    ...
  } else if (model instanceof Backbone.Collection) {
    ...
  }
}