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From "Byron Foster (JIRA)" <...@velocity.apache.org>
Subject [jira] Commented: (VELOCITY-688) ! preceding a reference in strict mode ignores a null exception
Date Tue, 10 Feb 2009 16:37:02 GMT

    [ https://issues.apache.org/jira/browse/VELOCITY-688?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12672312#action_12672312
] 

Byron Foster commented on VELOCITY-688:
---------------------------------------

Well, I figure rendering $foo as a blank string when it is null is the more natural thing
to do, and the behavior that in most cases will be desired.  I Just made it so that if people
really want an exception thrown when $foo is equal to null, they could use the bang syntax
($!foo).  But, this is more just using an existing syntax mechanism more then anything else.
 I could just as easily in strict mode go with the bang not doing anything at all, I don't
think it's really needed. Not sure, thoughts?

> ! preceding a reference in strict mode ignores a null exception
> ---------------------------------------------------------------
>
>                 Key: VELOCITY-688
>                 URL: https://issues.apache.org/jira/browse/VELOCITY-688
>             Project: Velocity
>          Issue Type: Improvement
>          Components: Engine
>    Affects Versions: 1.7
>            Reporter: Byron Foster
>             Fix For: 1.7
>
>
> Change strict mode (runtime.references.strict = true) behavior such that when Velocity
attempts to render a reference that evaluates to null then throw an exception.  If the reference
is preceded by '$!' as in $!foo, then simply render nothing and ignore the null value as it
does for non strict mode.

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