[jira] Assigned: (XAP-264) DataBinding: Bad error message when needed data source is missing

[Rob Gagne (JIRA)]

     [ 
https://issues.apache.org/jira/browse/XAP-264?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Rob Gagne reassigned XAP-264:
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    Assignee: James Margaris

> DataBinding: Bad error message when needed data source is missing
> -----------------------------------------------------------------
>
>                 Key: XAP-264
>                 URL: https://issues.apache.org/jira/browse/XAP-264
>             Project: XAP
>          Issue Type: Bug
>          Components: Data Binding
>            Reporter: Trevor Oldak
>         Assigned To: James Margaris
>
> OPen one of the xap dataBinding examples.
> Change a documentDataSource's id to one that isn't referenced.
> Run the new xal code.
> The following error message pops up:
> Exception:Bad attribute with name dataSource and value myDataSource on 
> element <binding xmlns="http://openxal.org/core/data"; id="employeeCount" 
> dataSource="myDataSource" select="concat(&apos;# Items: 
> &apos;,count(/employees/employee))"/> because of Exception: TypeError - 
> xap.taghandling.AttributeConversionException is not a constructor
> This doesn't explain very well to the user what went wrong

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