Question

I need to insert a model into a Collection at position Collection.length-2. The last model in the collection should always stay the last model in the collection.

What I tried so far:

I added one “page” model to the Collection “Pages” and then tried to swap them around by changing their sequence:

var insertedpage = Pages.at(Pages.length-1);
var lastpage = Pages.at(Pages.length-2);
insertedpage.set({sequence: Pages.length-1});
lastpage.set({sequence: Pages.length});

I also tried to remove the last page, then add a new page and then add the last page back in.

var lastpage =  Pages.pop();
Pages.add({example1: example2});
Pages.push(lastpage);

neither of these worked. The newly added page still appears as last model in the Collection. Do I need to call some kind of order function after this?

Answer 1

Sorry for the brief answer (don’t have time to respond), but look at defining a comparator function.

http://backbonejs.org/#Collection-comparator