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