Filtering epics from Kanban board

Question

I would like to start by saying I have read Rally Kanban - hiding Epic Stories but I'm still having trouble on implementing my filter based on the filter process from the Estimation Board app. Currently I'm trying to add an items filter to my query object for my cardboard. The query object calls this._getItems to return an array of items to filter from. As far as I can tell the query calls the function, loads for a second or two, and then displays no results. Any input, suggestions, or alternative solutions are welcomed.

Here's my code

$that._redisplayBoard = function() {


            that._getAndStorePrefData(displayBoard);

            this._getItems = function(callback) {

            //Build types based on checkbox selections
            var queries = [];

                    queries.push({key:"HierarchicalRequirement",
                        type: "HierarchicalRequirement",
                        fetch: "Name,FormattedID,Owner,ObjectID,Rank,PlanEstimate,Children,Ready,Blocked",
                        order: "Rank"

                    });



            function bucketItems(results) {
                var items = [];

                rally.forEach(queries, function(query) {
                    if (results[query.key]) {
                        rally.forEach(results[query.key], function(item) {
                            //exclude epic stories since estimates cannot be altered
                            if ((item._type !== 'HierarchicalRequirement') ||
                                    (item._type === 'HierarchicalRequirement' && item.Children.length === 0)) {
                                items = items.concat(item);

                            }
                        });
      }
                });


               callback(items);
                }

                 rallyDataSource.findAll(queries, bucketItems);

            };

            function displayBoard() {

                artifactTypes = [];



                var cardboardConfig = {

                    types: [],

                    items: that._getItems,

                    attribute: kanbanField,

                    sortAscending: true,

                    maxCardsPerColumn: 200,

                    order: "Rank",

                    cardRenderer: KanbanCardRenderer,

                    cardOptions: {

                        showTaskCompletion: showTaskCompletion,

                        showAgeAfter: showAgeAfter

                    },

                    columnRenderer: KanbanColumnRenderer,

                    columns: columns,

                    fetch: "Name,FormattedID,Owner,ObjectID,Rank,Ready,Blocked,LastUpdateDate,Tags,State,Priority,StoryType,Children"

                };



                if (showTaskCompletion) {

                    cardboardConfig.fetch += ",Tasks";

                }



                if (hideLastColumnIfReleased) {

                    cardboardConfig.query = new rally.sdk.util.Query("Release = null").or(kanbanField + " != " + '"' + lastState + '"');

                }



                if (filterByTagsDropdown && filterByTagsDropdown.getDisplayedValue()) {

                    cardboardConfig.cardOptions.filterBy = { field: FILTER_FIELD, value: filterByTagsDropdown.getDisplayedValue() };

                }



                cardboardConfig.types.push("HierarchicalRequirement");



                if (cardboard) {

                    cardboard.destroy();

                }



                artifactTypes = cardboardConfig.types;






                cardboard = new rally.sdk.ui.CardBoard(cardboardConfig, rallyDataSource);




                cardboard.addEventListener("preUpdate", that._onBeforeItemUpdated); 
                cardboard.addEventListener("onDataRetrieved", function(cardboard,args){ console.log(args.items); }); 

                cardboard.display("kanbanBoard");

            }

        };


        that.display = function(element) {



            //Build app layout

            this._createLayout(element);



            //Redisplay the board

            this._redisplayBoard();

        };

    };

Answer 1

Mark's answer caused an obscure crash when cardboard.setItems(filteredItems) was called. However, since the filtering code is actually manipulating the actual references, it turns out that setItems() method is actually not needed. I pulled it out, and it now filters properly.