gistfile1.txt

filterPanelConfig: {
        filters: [
          {
            title:   'Tags',
            iconCls: 'tag',
            store:   this.albumStore,
            convert: function(item) {
              return item.get('tag_list').split(',');
            }
          },
          {
            title:   'Authors',
            iconCls: 'author',
            store:   this.albumStore,
            convert: function(item) {
              return item.get('author_membership_id');
            }
          }
        ]
      }