Question

I want create a double-bracket link to a topic whose name is based on the current %TOPIC% name. But I only want the double bracket link if the destination topic already exists.

If the topic doesn't exist, then I want to display nothing.

For starters, just to get the CALC statement working correctly, I'm performing the test on if %TOPIC% itself exists.

The following attempts are coming up fruitless & I'm frustrated.....

%CALC{"$IF($EXISTS(%TOPIC%), [[%TOPIC%][this topic exists]], does not exist)"}%

%CALC{"$IF($EXISTS($perTOPIC$per), [[%TOPIC%][this topic exists]], does not exist)"}%

%CALC{"$IF($EXISTS($NOP(%)TOPIC$NOP(%)), [[%TOPIC%][this topic exists]], does not exist)"}%

Environment

-- KeithHelfrich - 15 Jul 2007

Answer

If you answer a question - or someone answered one of your questions - please remember to edit the page and set the status to answered. The status selector is below the edit box.

This is for my development of the QuickCheckListApp, where I want to link to =%TOPIC%ChecklistItemState ... but only if it exists already.

-- KeithHelfrich - 15 Jul 2007

Testing:

1. $IF($EXISTS(DynamicDoubleBracketLink): this topic exists
2. $IF($EXISTS(Support.DynamicDoubleBracketLink): this topic exists
3. $IF($EXISTS(DoesNotExist): does not exist
4. $IF($EXISTS(Support.DoesNotExist): does not exist

As you can see, a full web.topic name qualifier is needed. This is a bug that is fixed in the latest plugin. Upgrade to the latest plugin or use a full web.topic qualifier.

-- PeterThoeny - 15 Jul 2007

Thanks, Peter.

Using the web.topic qualifier works when the %CALC% is done inside of the topic itself. But when I try to place this same calc test in a CommentPlugin template, the result is a verbatim screen print of the calc command.

How can I do this if topic exists test inside of a CommentPlugin template ?

-- KeithHelfrich - 27 Jul 2007

I do not know. Seems like an inconsistency in the CommentPlugin.

-- PeterThoeny - 27 Jul 2007

OK, thanks. I have submitted Bugs:Item4423

-- KeithHelfrich - 27 Jul 2007

Setting to answered...

-- PeterThoeny - 29 Jul 2007