ODataModel 聚合的 getBindingContext() 返回未定义 [英] ODataModel aggregation's getBindingContext() returns undefined

问题描述

我有一个 sap.m.VBox 控件，其中 items 聚合绑定到 ODataModel 数据集，因此由 填充sap.m.HBox 模板控件包含多个 sap.m.Input 控件(绑定到相应的 ODataModel 的数据集属性)

I have a sap.m.VBox control, of which the items aggregation is bound to an ODataModel dataset, and as such is being populated by a sap.m.HBox template control containing multiple sap.m.Input controls (which are bound to the respective ODataModel's dataset properties)

在代码中:

<VBox items="{/My_ODatamodel_Dataset}">
    <items>
        <HBox>
            <Input value="{property1} change="doSomething"/>
            <Input value="{property2} change="doSomething"/>
            <Input value="{property3} change="doSomething"/>
        </HBox>
    </items>
</VBox>

(OData 数据集应用了过滤器，但为简洁起见我将其省略)

(the OData dataset has a filter applied, but I left it out for brevity)

因此，渲染结果将是一个 VBox，其中包含多行 HBox(我的 OData 集中的每个条目一个)包含这些条目的输入字段.

The rendered result will thus be a VBox with multiple rows of HBoxes (one for each entry in my OData set) containing the input fields for these entries.

在我的控制器中，我有 doSomething 方法:

In my controller, I have the doSomething method:

doSomething: function(oEvent) {
    var oCurrentContext  = oEvent.getSource().getBindingContext();
    var sSomeHiddenValue = oCurrentContext().getProperty("property4");
    // continue to do something special with hidden property 4 
}

然而，令我惊讶的是 oEvent.getSource().getBindingContext() 返回 undefined...

However, to my surprise oEvent.getSource().getBindingContext() returns undefined...

我想我在这里忽略了一些东西，但是当使用 JSON 模型而不是 OData 模型时它确实工作......

I suppose I'm overlooking something here, but it does work when using a JSON model instead of an OData model...

我想要实现的是从我正在进行更改的当前条目中获取属性值.是否有使用 OData 模型的不同方法?

What I'm trying to achieve, is to get a property value from the current entry in which I'm making a change. Is there a different way of doing so using an OData model?

非常感谢任何帮助！

推荐答案

有了ODataModel你需要从Model中获取上下文的属性，试试

with the ODataModel you need to get the properties of the context from the Model, try

  var oModel = oEvent.getSource().getModel();
  var oContext = oEvent.getSource().getBindingContext();
  var sSomeHiddenValue = oModel.getProperty("property4", oContext);

第jsp

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