Bug fixes

IPython/html/static/widgets/js/widget.js

@@ -286,6 +286,7 function(WidgetManager, _, Backbone){
             this.child_model_views = {};
             this.child_views = {};
             this.model.views.push(this);
+            this.id = this.id || IPython.utils.uuid();
         },
 
         update: function(){
@@ -304,6 +305,7 function(WidgetManager, _, Backbone){
             // it would be great to have the widget manager add the cell metadata
             // to the subview without having to add it here.
             var child_view = this.model.widget_manager.create_view(child_model, options || {}, this);
+            child_view.id = child_view.id || IPython.utils.uuid();
             
             // Associate the view id with the model id.
             if (this.child_model_views[child_model.id] === undefined) {
@@ -325,7 +327,7 function(WidgetManager, _, Backbone){
                 var view_id = view_ids[0];
                 var view = this.child_views[view_id];
                 delete this.child_views[view_id];
-                delete view_ids[0];
+                view_ids.splice(0,1);
                 child_model.views.pop(view);
             
                 // Remove the view list specific to this model if it is empty.
@@ -363,7 +365,6 function(WidgetManager, _, Backbone){
 
                 // Remove the non-matching items from the old list.
                 for (var j = i; j < old_list.length; j++) {
-                    console.log(j, old_list.length, old_list[j]);
                     removed_callback(old_list[j]);
                 }
 

IPython/html/static/widgets/js/widget_int.js

@@ -55,6 +55,7 define(["widgets/js/widget"], function(WidgetManager){
                 // one-to-one mapping with the corrosponding keys of the model.
                 var jquery_slider_keys = ['step', 'max', 'min', 'disabled'];
                 var that = this;
+                that.$slider.slider({});
                 _.each(jquery_slider_keys, function(key, i) {
                     var model_value = that.model.get(key);
                     if (model_value !== undefined) {