I'm generating HTML using a Velocity style sheet with version 1.6.2
The source contains lots of elements which are used to generate table
cell entries:
Description
The "required" attribute is supposed to be "Yes" or "No", with a
default of "No".
The VSL currently has:
#if($items.getAttributeV
> Is there a better way to handle optional attributes?
"!$items.getAttributeValue('required')" != ""
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That should be:
#if( "$!items.getAttributeValue('required')" != "" )
Or just $!items.getAttributeValue('required') if you don't mind
showing empty strings.
Or if you really want to clean up the look:
public class AltTool {
public Object empty(Object val, Object alt) {
return (val == null
Thanks for the suggestions which work fine.
There seems to have been a change in behaviour since version 1.5.1,
but I could not find it in the release notes. Can anyone confirm this?
On 14/06/2009, Nathan Bubna wrote:
> That should be:
>
> #if( "$!items.getAttributeValue('required')" != "" )
>
Your original VTL amounted to #if ( null != "" ) when there was no
attribute value. The fact that this evaluated as false was a bug,
since null doesn't equal the empty string. Several little, obscure
comparison bugs like this were fixed prior to 1.6.2. I don't recall,
though, under which commit
I see, thanks.
On 15/06/2009, Nathan Bubna wrote:
> Your original VTL amounted to #if ( null != "" ) when there was no
> attribute value. The fact that this evaluated as false was a bug,
> since null doesn't equal the empty string. Several little, obscure
> comparison bugs like this were fi
