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https://issues.apache.org/jira/browse/FLEX-22452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13633908#comment-13633908
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Justin Mclean edited comment on FLEX-22452 at 4/17/13 8:52 AM:
---------------------------------------------------------------
Looking at nullCompare looks like issue has been fixed.
Tested with this code:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009";
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<mx:AdvancedDataGrid sortableColumns="true"
dataProvider="{[{num:23},{num:null},{num:34},{num:67},{num:1},{num:2},{num:3},{num:null},{num:9},{num:13}]}">
<mx:columns>
<mx:AdvancedDataGridColumn dataField="num" />
</mx:columns>
</mx:AdvancedDataGrid>
</s:Application>
was (Author: jmclean):
Looking at nullCompare look like issue has been fixed.
Tested with this code:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009";
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<mx:AdvancedDataGrid sortableColumns="true"
dataProvider="{[{num:23},{num:null},{num:34},{num:67},{num:1},{num:2},{num:3},{num:null},{num:9},{num:13}]}">
<mx:columns>
<mx:AdvancedDataGridColumn dataField="num" />
</mx:columns>
</mx:AdvancedDataGrid>
</s:Application>
> Error in SortField.nullCompare logic
> ------------------------------------
>
> Key: FLEX-22452
> URL: https://issues.apache.org/jira/browse/FLEX-22452
> Project: Apache Flex
> Issue Type: Bug
> Components: mx: General, Runtime Exceptions
> Affects Versions: Adobe Flex SDK 3.2 (Release)
> Environment: Affected OS(s): All OS Platforms
> Affected OS(s): All OS Platforms
> Browser: Firefox 3.x
> Language Found: English
> Reporter: Adobe JIRA
> Assignee: Justin Mclean
> Labels: easyfix, easytest
>
> Steps to reproduce:
> 1. Populate an AdvancedDataGrid with multiple columns, one of which is a
> "Number" type
> 2. Have some of the Numbers be null and some be values
> 3. Sort on this column will crash with exception below
>
> Actual Results:
> Error: Cannot determine comparator for SortField with name 'policy_score'.
> at
> mx.collections::SortField/nullCompare()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\SortField.as:566]
> at
> mx.collections::SortField/http://www.adobe.com/2006/flex/mx/internal::internalCompare()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\SortField.as:234]
> at
> mx.collections::Sort/internalCompare()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\Sort.as:831]
> at
> mx.collections::Sort/findItem()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\Sort.as:528]
> at
> mx.collections::ListCollectionView/getItemIndex()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\ListCollectionView.as:513]
> at
> ListCollectionViewCursor/collectionEventHandler()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\ListCollectionView.as:2154]
> at flash.events::EventDispatcher/dispatchEventFunction()
> at flash.events::EventDispatcher/dispatchEvent()
> at
> mx.collections::ListCollectionView/dispatchEvent()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\ListCollectionView.as:833]
> at
> mx.collections::ListCollectionView/internalRefresh()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\ListCollectionView.as:1275]
> at
> mx.collections::ListCollectionView/refresh()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\ListCollectionView.as:402]
> at
> mx.controls::AdvancedDataGridBaseEx/sortHandler()[C:\work\flex\dmv_automation\projects\datavisualisation\src\mx\controls\AdvancedDataGridBaseEx.as:6864]
> at
> mx.controls::AdvancedDataGrid/sortHandler()[C:\work\flex\dmv_automation\projects\datavisualisation\src\mx\controls\AdvancedDataGrid.as:6896]
> at flash.events::EventDispatcher/dispatchEventFunction()
> at flash.events::EventDispatcher/dispatchEvent()
> at
> mx.core::UIComponent/dispatchEvent()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:9298]
> at
> mx.controls::AdvancedDataGrid/headerReleaseHandler()[C:\work\flex\dmv_automation\projects\datavisualisation\src\mx\controls\AdvancedDataGrid.as:7117]
> at flash.events::EventDispatcher/dispatchEventFunction()
> at flash.events::EventDispatcher/dispatchEvent()
> at
> mx.core::UIComponent/dispatchEvent()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:9298]
> at
> mx.controls::AdvancedDataGridBaseEx/mouseUpHandler()[C:\work\flex\dmv_automation\projects\datavisualisation\src\mx\controls\AdvancedDataGridBaseEx.as:5733]
> at
> mx.controls::AdvancedDataGrid/mouseUpHandler()[C:\work\flex\dmv_automation\projects\datavisualisation\src\mx\controls\AdvancedDataGrid.as:8454]
>
> Expected Results:
> - Problem is that nullCompare checks attempts to get value for attribute for
> each row being compared. If one of the rows returns a null value the the
> entire row is used as the value. Rather, a null value should be treated
> either as the "lowest" value or the "highest" value for the purpose of
> numeric comparsions thereby pushing all nulls to the top or bottom of the
> list. (I would suggest lowest)
>
> Workaround (if any):
> - write your own custom sort routine
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