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From "Nathan Bubna (JIRA)" <...@velocity.apache.org>
Subject [jira] Commented: (VELOCITY-688) ! preceding a reference in strict mode ignores a null exception
Date Tue, 10 Feb 2009 17:15:06 GMT

    [ https://issues.apache.org/jira/browse/VELOCITY-688?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12672325#action_12672325
] 

Nathan Bubna commented on VELOCITY-688:
---------------------------------------

Natural is all relative.  I guess i can understand strict ref rendering $foo as empty string,
because in strict ref mode $foo is never schmoo.   But using $! to say "go boom when null"
seems really unnatural to me as a Velocity user who is used to $! meaning "this can be null".

Honestly, i think it would make more sense to have $foo throw an exception when undefined
or null and have $!foo still throw an exception when undefined but render empty string when
null.  Which, i think is how it was, right?

> ! 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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