[jira] Updated: (TAPESTRY-218) Persistent properties can't be set to null

["Howard M. Lewis Ship (JIRA)" <ta...@jakarta.apache.org>]

     [ http://issues.apache.org/jira/browse/TAPESTRY-218?page=history ]

Howard M. Lewis Ship updated TAPESTRY-218:
------------------------------------------

        Summary: Persistent properties can't be set to null  (was: Persistent properties cant be set to null)
        Version: 3.0.1
    Fix Version: 3.0.2

> Persistent properties can't be set to null
> ------------------------------------------
>
>          Key: TAPESTRY-218
>          URL: http://issues.apache.org/jira/browse/TAPESTRY-218
>      Project: Tapestry
>         Type: Bug
>   Components: Framework
>     Versions: 3.0, 3.0.1
>  Environment: IBM WebSphere 4
>     Reporter: Michael Frericks
>     Assignee: Howard M. Lewis Ship
>      Fix For: 3.0.2

>
> situation:
> If you set a persistent property to null, this finally invokes
> SessionPageRecorder#recordChange
> ...
>         _session.setAttribute(attributeKey, newValue);
> ...
> where newValue is null.
> The ServletAPI 2.2 says:
>         newValue - the object to be bound; cannot be null
> So we tested and saw that the IBM WebSphere 4 really did not
> accept the null value and the propety was not changed.
> That is ugly.
> solution:
> Change 
> SessionPageRecorder#recordChange
> ...
>         _session.setAttribute(attributeKey, newValue);
> ...
> to 
>         if(newValue != null)
>         {
>           _session.setAttribute(attributeKey, newValue);
>         }
>         else
>         {
>           _session.removeAttribute(attributeKey);
>         }

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