getBindingContext() 返回未定义 [英] getBindingContext() returns undefined

问题描述

我正在开发一个 SplitApp.从列表中选择一个项目时，它说

I am working on a SplitApp. On selecting an item from the list, it says

未捕获的类型错误:无法读取未定义的属性getPath"

Uncaught TypeError: Cannot read property 'getPath' of undefined

Master.controller.js

onSelect: function(oEvent) {
  this.showDetail(oEvent.getParameter("listItem") || oEvent.getSource());
},

showDetail: function(oItem) {
  // ...
  this.getRouter().navTo("detail", {
    from: "master",
    entity: oItem.getBindingContext().getPath().substr(1), // Error
    tab: this.sTab
  }, bReplace);
},

oItem.getBindingContext() 返回 undefined.所以我认为问题在于绑定上下文.

oItem.getBindingContext() returns undefined. So I believe the problem is with binding context.

<List id="list" growing="true" items="{data>/results}">
  <ObjectListItem id="listItem"
    title="{myModel>PROJECTNAME}"
    number="{myModel>REVENUE}"
    numberUnit="{myModel>CURRENCY}"
    press=".onSelect"
  />
</List>

Component.js

// JSONModel required from "sap/ui/model/json/JSONModel"
var oModel= new JSONModel();
oModel.loadData("Data.json");
this.setModel(oModel,"myModel");

列表已显示，但当我选择该项目时，抛出错误.

The list is displayed but when I select the item, the error is thrown.

推荐答案

getBindingContext(sModelName?)

获取给定模型名称的此对象的绑定上下文.如果对象本身没有设置绑定上下文并且没有自己的模型集，它将使用在其父层次结构中定义的第一个绑定上下文.

您已为模型命名 (this.setModel(oModel, myModel")).指定模型名称 (oItem.getBindingContext("myModel")) 以访问绑定上下文.

You have given name to the model (this.setModel(oModel, "myModel")). Specify the model name (oItem.getBindingContext("myModel")) to access the binding context.

同样适用于 setBindingContext(oContext, "myModel").

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