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https://issues.apache.org/jira/browse/WW-4968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16648345#comment-16648345
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Aleksandr Mashchenko edited comment on WW-4968 at 10/12/18 7:27 PM:
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Read [this|https://stackoverflow.com/q/25551470/1700321].
was (Author: aleksandr-m):
Read [this | https://stackoverflow.com/q/25551470/1700321].
> combining s:set and s:property where the property retrieved is null has
> unexpected results
> ------------------------------------------------------------------------------------------
>
> Key: WW-4968
> URL: https://issues.apache.org/jira/browse/WW-4968
> Project: Struts 2
> Issue Type: Bug
> Components: Core Tags
> Affects Versions: 2.5.14.1
> Reporter: Nate
> Priority: Major
>
> I have the following s:set definition:
> <s:set var="name"
> value="buildEnvironmentSearchView.name" scope="request"></s:set>
> which I further on use as such in a Dojo input:
> <input data-dojo-type="dijit/form/ComboBox"
> data-dojo-props="store:nameIdentificationStore, searchAttr:'name',
> value:'${name}'"
> name="buildEnvironmentSearchView.name"
> id="buildEnvironmentSearchView.name" />
> I needed to escape the value this generated for Javascript so single quotes
> didn't corrupt the dojo-props, so I replaced it withÂ
> <s:set var="name" scope="request">
> <s:property value="buildEnvironmentSearchView.name" escapeJavaScript="true"/>
> </s:set>
> This worked if buildEnvironmentSearchView.name is not null, but when it is
> evaluated to be null, instead of name being set to null, it was evaluated to
> the toString value of the top element on my valueStack:
> be.companyname.productname.client.struts2.layout.FieldFormatter@19b82032
> I'm not sure why this happens. In the end, I managed to resolve it by putting
> the s:property directly into the data-dojo-props object, but I don't really
> get why this happened. Is it intended that if you do an s:set with a null
> value, it returns the top value of the stack? This doesn't seem to be
> documented anywhere.
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