sapui5 - 添加第二个过滤器而不删除现有过滤器

Question

您好，我有一个搜索字段，后面有这段代码:

onSearch : function (oEvent) {
    if (oEvent.getParameters().refreshButtonPressed) {
        // Search field's 'refresh' button has been pressed.
        // This is visible if you select any master list item.
        // In this case no new search is triggered, we only
        // refresh the list binding.
        this.onRefresh();
    } else {
        var andFilter = [];
        var sQuery = oEvent.getParameter("query");
        if (sQuery && sQuery.length > 0) {
            // add filters
            var oTableSearchState = [];
            oTableSearchState = [new Filter("Supplier", FilterOperator.Contains, sQuery),                                        new Filter("BusArea", FilterOperator.Contains, sQuery),             new Filter("CostCenter", FilterOperator.Contains, sQuery),
            new Filter("FuncArea", FilterOperator.Contains, sQuery)];
            andFilter.push(new Filter(oTableSearchState, false));
        }
        this._applySearch(andFilter);
   }
},

还有一个应该添加额外过滤器的过滤器按钮。像这样:

onSetFilter : function(oEvent) {
    var andFilter = [];
    andFilter.push(new Filter("BusArea", FilterOperator.EQ, "5000"));
    this._applySearch(andFilter);
},

当然，“BusArea”部分应该取决于选择的过滤器。它可能超过 1 个过滤器。 _applySearch 函数如下所示:

_applySearch: function(andFilter) {
    var oViewModel = this.getModel("worklistView");
    this._oTable.getBinding("items").filter(andFilter, true);
    // changes the noDataText of the list in case there are no filter results
    if (andFilter.length !== 0) {
        oViewModel.setProperty("/tableNoDataText", 
        this.getResourceBundle().getText("worklistNoDataWithSearchText"));
    }
}

问题是，当我通过过滤器按钮添加过滤器时，搜索栏中的过滤器消失了，反之亦然。我如何更改我的代码，以便我可以在不删除现有过滤器的情况下添加过滤器？

Answer 1

一种解决方案是从绑定(bind)信息中获取过滤器，并使用 和 将新过滤器一起推回。

this._oTable.getBindingInfo("items").filters.aFilters;