在SAPUI5 treetable

Question

您好我正在使用SAPUI5 tree table。 现在我的模型是这样的

         {
                name: "BookingCollection",
                //operations:operations,
                0:{
                    name: "Query",
                    dropDown: false,
                    img: "op"      <-- Should LOAD SECOND but the get request for it is never fired
                },
                1: {
                    name: "Read",
                    dropDown: false,
                    img: "op"
                },
                2: {
                    name: "Create",
                    dropDown: false,
                    img: "op"
                },
                3: {
                    name: "Update",
                    dropDown: false,
                    img: "op"
                },
                4: {
                    name: "Delete",
                    dropDown: false,
                    img: "op"
                },
                dropDown: true,
                img: "et"     <-- GETS LOADED FIRST AS IT IS PARENT
            }

我对ImageControl的键' img '具有约束力：

 var nodeImage = new sap.ui.commons.Image();

    nodeImage.bindProperty("src", {
                        path:"img",
                        formatter:function (value) {

                            switch (value) {
                                case 'et':
                                    return "images/gv/et.png";

                                case 'op':
                                    return "images/gv/opr.gif"
                            }
                        },
                        mode: sap.ui.model.BindingMode.TwoWay

                });

现在问题是，即使格式化程序返回子图像的正确路径，也会为子项显示父项图像。

是否因为一些约束性问题？为什么像Query，Read等子元素也引用父母的图像？