data-binding - 由于templateShareable :true?导致SAPUI5错误消息的解决方法

Question

自从升级 SAPUI5 1.28.20 后，我收到以下错误消息:

A shared template must be marked with templateShareable:true in the binding info

代码在 MangedObject.js 中，如下所示:

        } else if ( oBindingInfo.templateShareable === MAYBE_SHAREABLE_OR_NOT ) {
            // a 'clone' operation implies sharing the template (if templateShareable is not set to false)
            oBindingInfo.templateShareable = oCloneBindingInfo.templateShareable = true;
            jQuery.sap.log.error("A shared template must be marked with templateShareable:true in the binding info");
        }

oBindingInfo.templateShareable 的值为 true，MAYBE_SHAREABLE_OR_NOT 的值为 1。

根据文档，oBindingInfo.templateShareable 的默认值为 true。

那么这里有什么问题呢？库中的错误？或者我的代码有什么？另见:https://sapui5.netweaver.ondemand.com/sdk/#docs/api/symbols/sap.ui.base.ManagedObject.html

SAPUI5 1.32.x 版更新

在 1.32.x 版本中，消息已更改为:

A template was reused in a binding, but was already marked as candidate for destroy. You better should declare such a usage with templateShareable:true in the binding configuration. -

但根据文档，默认值仍应为 true:

{boolean} oBindingInfo.templateShareable?, Default: true option to enable that the template will be shared which means that it won't be destroyed or cloned automatically

现在看起来，这会产生一些无休止的加载，我一次又一次地收到这条消息，直到浏览器崩溃。有人知道可能出了什么问题吗？

Answer 1

看起来如果模板是在绑定(bind)之外实例化的，则会出现该消息。示例:

此代码将起作用:

new sap.m.Select({
    items : {
        path : "/Items",
        template : new sap.ui.core.Item({
            text : "{Name}"
        }) 
    }
}) 

这段代码似乎产生了消息:

var oTemplate = new sap.ui.core.Item({
    text : "{Name}"
}) 


new sap.m.Select({
    items : {
        path : "/Items",
        template :oTemplate
    }
})

这似乎解决了问题:

var oTemplate = new sap.ui.core.Item({
    text : "{Name}"
}) 


new sap.m.Select({
    items : {
        path : "/Items",
        template :oTemplate,
        templateShareable : true
    }
})