onTransition: function(e) {
e.preventDefault();
var $el = $(e.target);
var activityModel = this.model;
$el.one('transitions_success', function() {
// manually update the model in case the workflow transition does not change any of it's attributes
activityModel.set('updatedAt', new Date());
mediator.trigger('widget_success:activity_list:item:update');
});
transitionHandler.call($el, false);
},
this.$button.data('executor', function() {
TransitionHandler.call(self.$button);
});