[jira] [Resolved] (FLEX-23680) Sorting fails when a DataGridColumn uses a complex value for the dataField attribute

["Justin Mclean (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLEX-23680?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Justin Mclean resolved FLEX-23680.
----------------------------------

       Resolution: Fixed
    Fix Version/s: Apache Flex 4.11.0

Fixed by fix to FLEX-25369
                
> Sorting fails when a DataGridColumn uses a complex value for the dataField attribute
> ------------------------------------------------------------------------------------
>
>                 Key: FLEX-23680
>                 URL: https://issues.apache.org/jira/browse/FLEX-23680
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: Collections
>    Affects Versions: Adobe Flex SDK 4.0 (Release)
>         Environment: Affected OS(s): All OS Platforms
> Affected OS(s): All OS Platforms
> Browser: Internet Explorer 8.x
> Language Found: English
>            Reporter: Adobe JIRA
>             Fix For: Apache Flex 4.11.0
>
>
> Steps to reproduce:
> 1. Run attached sample
> 2. Apply a sort on the "Parent Name" column
> 3. Click the button at the bottom to trigger CollectionEvent.COLLECTION_CHANGE
>  
>  Actual Results:
>  Runtime error in the mx.collections.Sort class. DataGrid behaves inconsistently thereafter
>  
>  Expected Results:
>  DataGrid UI should update with new value
>  
>  Workaround (if any):
>  Don't use DataGridColumns with a complex value for "dataField" even though the framework supports it. Implement a labelFunction and sortCompareFunction for the column
>  
>  More information:
> The DataGridColumn supports "complex" values for the dataField (eg "parent.name") however this doesn't appear to be fully-supported by the Sort class. When applying a sort on a column with a complex dataField and then triggering PropertyChangeEvent.PROPERTY_CHANGE an error is thrown because Sort can't handle a complex field name. The problem is line 506 of Sort where it attempts to the evaluate the field name and marks that it cannot be found. This doesn't always show up as a problem because ListCollectionView.collectionEventHandler (line 2518) catches this error but ListCollectionView.listChangeHandler (line 1300) doesn't catch it. This behavior is inconsistent and should be looked at.  Ideally the Sort class should be able to evaluate complex field names in the way that DataGridColumn does, in set dataField (lines 461-485) and itemToLabel (lines 1680-1718).
>  
> Note: this was originally found in Flex SDK 3.5.0 but applies to Flex 4 also.

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