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https://issues.apache.org/jira/browse/TAPESTRY-2502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12611311#action_12611311
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Martijn Brinkers commented on TAPESTRY-2502:
--------------------------------------------
As a workaround you can return an 'empty' row element and set the rowClass for
this row to make the row invisible.
Example:
public String getRowClass()
{
String rowClass = null;
if (certificate.isNull())
{
/*
* It's an empty row.
*/
rowClass = nullRowClass;
}
return rowClass;
}
and nullRowClass something like:
.empty-element {
display : none;
}
> gridDataSource and possible 'race condition'
> --------------------------------------------
>
> Key: TAPESTRY-2502
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2502
> Project: Tapestry
> Issue Type: Bug
> Components: Core Components
> Affects Versions: 5.0.13
> Reporter: Martijn Brinkers
>
> GridDataSource requires you to return the number of rows from the
> getAvailableRows method. Later prepare gets called allowing you to get
> the records (or some of). Now if between the call to getAvailableRows
> and prepare some records are deleted you'll end up with less records
> then reported by getAvailableRows. Now what should be returned from
> getRowValue? I tried returning null but that was not allowed (like in
> exceptions occured).
> What I would like is that when getRowValue returns
> null that the grid stops requesting more rows. This would also make it
> easier when you do not know how many rows you have in advance.
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