gistfile1.js

    // currently sorting my collection with this comparator.
    // It sets up a relationship so that a Parent Item should be before its sub-items(you can think of these as sub tasks)
    // 'parent' attribute is just the 'pk' of the parent item.
    // This is working fantastically but I need to sort at a higher level above this descending from an attribute called
    // 'created_at'.
    // the `else` refers to items that are either parents, or items that have no relationship to any others.
    comparator: function(item) {
      if (item.isSubItem()) {
        return [item.get('parent'), item.get('pk')];
      } else {
        return [item.get('pk'), 0];
      }
    },
    // so it really should look something like this when complete.
    // [itemCreatedTodayWithNoParents, parentItemCreatedYesterday, subItemOfpreviousParentCreatedWhenever, itemCreatedLastWeek]