Javascript 将数组结果从一个json对象移动到另一个json对象

我在_initializeData中创建了一个新的json数据模型。目的是当用户试图删除购物车中的项目时，我想将该项目存储在这个新的数据模型中。因此，单击remove按钮，我将读取包含购物车中所有项目的json数据模型，然后使用已删除元素的索引将结果复制到新模型中。如果我只删除一个项目，效果很好。但如果我在另一项上按remove，则新模型中的前一项会被新项覆盖。它不像数组那样保存所有条目

_initializeData: function () {
        var removedData = {};  // new model for removed parts
        removedData.removedParts = [];
        this.removedItems = new JSONModel(removedData);
        this.getView().setModel(this.removedItems, "removedItems");
 }

// button click
onRemovePart: function (oEvent) {  
        var idx = this.getView().byId("table").getSelectedIndex();

        // retrieveing the model which has all the parts from the table 
        var data = this.getView().getModel("materialData").getProperty("/partsData");

        // reading the removed item data 
        var removedPart = data[idx];

        // assigning it to the new model. But it does not hold multiple 
        entries rather over-writes the previous one
        this.getView().getModel("removedItems").setProperty("/removedParts", removedPart);

---

使用

Array.slice（）

避免引用。这里，引用导致重写行为

问题是您正在重写模型上的完整对象：removedItems

由于您覆盖了它，旧数据将丢失。因此，您所需要做的就是获取旧的已删除项数组，将元素推入其中，然后将其设置为model

   _initializeData: function () {
        var removedData = {};  // new model for removed parts
        removedData.removedParts = [];
        this.removedItems = new JSONModel(removedData);
        this.getView().setModel(this.removedItems, "removedItems");
 }

// button click
onRemovePart: function (oEvent) {  
        var idx = this.getView().byId("table").getSelectedIndex();

        // retrieveing the model which has all the parts from the table 
        var data = this.getView().getModel("materialData").getProperty("/partsData");

        // reading the removed item data 
        var removedPart = data[idx];

        // assigning it to the new model. But it does not hold multiple 
        entries rather over-writes the previous one
        // Get the old deleted items first :
        var oDeletedItems = this.getView().getModel("removedItems").getProperty("/removedParts");
        oDeletedItems.removedParts.push(removedPart); // the array is removedParts and oDeletedItems is the obejct which stores the array as per _initlaise method
        this.getView().getModel("removedItems").setProperty("/removedParts", oDeletedItems);

---

希望这能有所帮助。

我做了以下操作，但仍然重写了它，并且只存在一个条目var idx=this.getView（）.byId（“表”）.getSelectedIndex（）；var data=this.getView（）.getModel（“orderParts”）.getProperty（“/orderPartsData”）；移除的var=数据拼接（idx，1）；this.removedItems.setProperty（“/removedParts”，已删除）；你能帮我解决这个问题吗