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https://issues.apache.org/jira/browse/FLEX-34218?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Mclean resolved FLEX-34218.
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Resolution: Not a Problem
No an issue, we may want to revisit performance of mx:List etc at a later date.
> Binding error in DataGridColumn
> -------------------------------
>
> Key: FLEX-34218
> URL: https://issues.apache.org/jira/browse/FLEX-34218
> Project: Apache Flex
> Issue Type: Bug
> Components: Data Binding, mx: DataGrid
> Affects Versions: Apache Flex 4.12.0
> Environment: Windows 7 64bits
> Reporter: Fernando Hernandez
> Assignee: Justin Mclean
> Labels: DataGridColumn
> Original Estimate: 8h
> Remaining Estimate: 8h
>
> The mx:DataGridColumn launch exception when dataField property is used with
> any getter function that can be throw a TypeError. The errors aren't catched
> as expected in mx:DataGridColumn#itemToLabel() function. The spark GridColumn
> still ignores errors.
>
> Existing applications may break.
> In Flex 4.12 you remove the try catch for mx:DataGridColumn#itemToLabel()
> for data[datafield] in this changeset:
> https://fisheye6.atlassian.com/changelog/flex-sdk?cs=9f8aab8675dc3288be9b1b906da64b5c91728d70
> StackTrace
> TypeError: Error #1009: Cannot access a property or method of a null object
> reference.
> at Item/get
> count()[C:\desarrollo\workspaces\fluid\flexbuilder7-workspace\asdf\src\Item.as:16]
> at
> mx.controls.dataGridClasses::DataGridColumn/itemToLabel()[/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/mx/src/mx/controls/dataGridClasses/DataGridColumn.as:1749]
> at
> mx.controls.dataGridClasses::DataGridBase/makeListData()[/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/mx/src/mx/controls/dataGridClasses/DataGridBase.as:1493]
> at
> mx.controls::DataGrid/http://www.adobe.com/2006/flex/mx/internal::setupRendererFromData()[/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/mx/src/mx/controls/DataGrid.as:2013]
> at
> mx.controls::DataGrid/commitProperties()[/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/mx/src/mx/controls/DataGrid.as:1968]
> at
> mx.core::UIComponent/validateProperties()[/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/framework/src/mx/core/UIComponent.as:8751]
> at
> mx.managers::LayoutManager/validateProperties()[/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/framework/src/mx/managers/LayoutManager.as:605]
> at
> mx.managers::LayoutManager/doPhasedInstantiation()[/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/framework/src/mx/managers/LayoutManager.as:821]
> at
> mx.managers::LayoutManager/doPhasedInstantiationCallback()[/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/framework/src/mx/managers/LayoutManager.as:1188]
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