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https://issues.apache.org/jira/browse/TAP5-1971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thiago H. de Paula Figueiredo updated TAP5-1971:
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Priority: Minor (was: Critical)
Changing this from critical to minor because the cause of the problem isn't
Tapestry, it's Hibernate, and it has an easy workaround.
> HibernateGridDataSource should include some workaround or protection agains
> wrong Projections.rowCount() result
> ---------------------------------------------------------------------------------------------------------------
>
> Key: TAP5-1971
> URL: https://issues.apache.org/jira/browse/TAP5-1971
> Project: Tapestry 5
> Issue Type: Improvement
> Components: tapestry-hibernate
> Affects Versions: 5.3.3
> Reporter: Andrei Arapov
> Priority: Minor
>
> In some cases Hibernate's criteria construction like
> "criteria.setProjection(Projections.rowCount())" returns wrong number of
> rows. More specifically, for example, if you have some JPA restrictions in
> you entity annotations (e.g.
> " @ManyToOne
> @JoinColumn(name = "USER_ID", nullable = false) <---- this one!
> @NonVisual
> public UserImpl user; ")
> then such restrictions (for USER_ID is not null) will not be taken in account
> while building "row-count" query.
> Vice-versa hibernate will use such restrictions in query for getting LIST of
> entities.
> This behaivour fails, when in entity table appear (e.g. some old) rows with
> NULL in "USER_ID" (e.g.) columns.
> This is known, but not solved problem for Hibernate, see:
> https://hibernate.onjira.com/browse/HHH-3238
> https://hibernate.onjira.com/browse/HHH-2787
> https://hibernate.onjira.com/browse/HHH-3206
> https://hibernate.onjira.com/browse/HHH-5719
> https://hibernate.onjira.com/browse/HHH-4829
> https://hibernate.onjira.com/browse/HHH-7438
> There by we go into error in HibernateGridDataSource.getRowValue(int index)
> method: it throws IndexOutOfBoundsException due to row count number is bigger
> than actual number of selected rows.
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