You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@velocity.apache.org by "Ludwig Magnusson (JIRA)" <de...@velocity.apache.org> on 2010/03/08 12:45:27 UTC
[jira] Created: (VELOCITY-756) New notation for replacing null
values with a specified string
New notation for replacing null values with a specified string
--------------------------------------------------------------
Key: VELOCITY-756
URL: https://issues.apache.org/jira/browse/VELOCITY-756
Project: Velocity
Issue Type: New Feature
Components: Engine
Reporter: Ludwig Magnusson
Priority: Minor
If I have a variable $foo and it is null, I have the option of using the silent notation $!foo for not writing it. But often when genrating HTML pages I want to express that the values is missing, e.g. by a "-". That means that I have to write my code like this:
#if($foo)
$foo
#else
-
#end
Wouldn't it be great if there were a new option like $?foo (or whatever chararter would be suitable instead of "?") that would print the variable $foo if it was not null and otherwise print a predefined character like "-".
/Ludwig
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@velocity.apache.org
For additional commands, e-mail: dev-help@velocity.apache.org
[jira] Commented: (VELOCITY-756) New notation for replacing null
values with a specified string
Posted by "Ludwig Magnusson (JIRA)" <de...@velocity.apache.org>.
[ https://issues.apache.org/jira/browse/VELOCITY-756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12850820#action_12850820 ]
Ludwig Magnusson commented on VELOCITY-756:
-------------------------------------------
I did not know that this feature existed and I agree that it is a better and more flexible solution.
Thanks for the comment.
> New notation for replacing null values with a specified string
> --------------------------------------------------------------
>
> Key: VELOCITY-756
> URL: https://issues.apache.org/jira/browse/VELOCITY-756
> Project: Velocity
> Issue Type: New Feature
> Components: Engine
> Reporter: Ludwig Magnusson
> Priority: Minor
>
> If I have a variable $foo and it is null, I have the option of using the silent notation $!foo for not writing it. But often when genrating HTML pages I want to express that the values is missing, e.g. by a "-". That means that I have to write my code like this:
> #if($foo)
> $foo
> #else
> -
> #end
> Wouldn't it be great if there were a new option like $?foo (or whatever chararter would be suitable instead of "?") that would print the variable $foo if it was not null and otherwise print a predefined character like "-".
> /Ludwig
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@velocity.apache.org
For additional commands, e-mail: dev-help@velocity.apache.org
[jira] Commented: (VELOCITY-756) New notation for replacing null
values with a specified string
Posted by "Nathan Bubna (JIRA)" <de...@velocity.apache.org>.
[ https://issues.apache.org/jira/browse/VELOCITY-756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12850724#action_12850724 ]
Nathan Bubna commented on VELOCITY-756:
---------------------------------------
As an alternate to #if #else, there is also:
http://velocity.apache.org/tools/devel/javadoc/org/apache/velocity/tools/generic/DisplayTool.html
which provides $display.alt($foo) and $display.alt($foo, 'n/a') and many other such display control methods. This is ideally where "extra" features like this go. The tool approach has several advantages:
- keeps VTL syntax simple and contained (feature creep has its costs)
- provides API that is easy to extend and enhance
- typically provides much more clear and user-friendly API
Unless the $?foo syntax were to become something frequently requested (which it has never been), i don't see us working to adopt it anytime soon, for the reason of keeping things simple.
> New notation for replacing null values with a specified string
> --------------------------------------------------------------
>
> Key: VELOCITY-756
> URL: https://issues.apache.org/jira/browse/VELOCITY-756
> Project: Velocity
> Issue Type: New Feature
> Components: Engine
> Reporter: Ludwig Magnusson
> Priority: Minor
>
> If I have a variable $foo and it is null, I have the option of using the silent notation $!foo for not writing it. But often when genrating HTML pages I want to express that the values is missing, e.g. by a "-". That means that I have to write my code like this:
> #if($foo)
> $foo
> #else
> -
> #end
> Wouldn't it be great if there were a new option like $?foo (or whatever chararter would be suitable instead of "?") that would print the variable $foo if it was not null and otherwise print a predefined character like "-".
> /Ludwig
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@velocity.apache.org
For additional commands, e-mail: dev-help@velocity.apache.org
[jira] Resolved: (VELOCITY-756) New notation for replacing null
values with a specified string
Posted by "Jarkko Viinamäki (JIRA)" <de...@velocity.apache.org>.
[ https://issues.apache.org/jira/browse/VELOCITY-756?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jarkko Viinamäki resolved VELOCITY-756.
---------------------------------------
Resolution: Won't Fix
Closing based on Nathan's comment.
> New notation for replacing null values with a specified string
> --------------------------------------------------------------
>
> Key: VELOCITY-756
> URL: https://issues.apache.org/jira/browse/VELOCITY-756
> Project: Velocity
> Issue Type: New Feature
> Components: Engine
> Reporter: Ludwig Magnusson
> Priority: Minor
>
> If I have a variable $foo and it is null, I have the option of using the silent notation $!foo for not writing it. But often when genrating HTML pages I want to express that the values is missing, e.g. by a "-". That means that I have to write my code like this:
> #if($foo)
> $foo
> #else
> -
> #end
> Wouldn't it be great if there were a new option like $?foo (or whatever chararter would be suitable instead of "?") that would print the variable $foo if it was not null and otherwise print a predefined character like "-".
> /Ludwig
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@velocity.apache.org
For additional commands, e-mail: dev-help@velocity.apache.org