[model,bugfix][s]: fix nasty subtle bug (1h+ to track down) whereby d…

…ataset change event not being triggered on resource update.

* Details: discovered this because using fixtures dataset view was not showing resources. Tracked this to fact that on dataset.set with fixture data (of existing dataset -- one autocreated for view) change event was getting fired *before* _updateChildren called (or completed) and hence resources not being shown (as render happened before resources on object).

lib/model.js

@@ -129,8 +129,15 @@ CKAN.Model = function ($, _, Backbone, undefined) {
     _createChildren: function () {
       _.each(this.children, function (Model, key) {
         if (!this.get(key)) {
-          this.attributes[key] = new Backbone.Collection();
-          this.attributes[key].model = Model;
+          var newColl = new Backbone.Collection();
+          this.attributes[key] = newColl;
+          newColl.model = Model;
+          // bind change events so updating the children trigger change on Dataset
+          var self = this;
+          // TODO: do we want to do all or be more selective
+          newColl.bind('all', function() {
+            self.trigger('change');
+          });
         }
       }, this);
       return this;