Question

The background is:

1. I have layout page main.gsp
2. I need to conditionally show or hide menu item
3. Condition evaluation is done by querying database
4. I don’t want to augment each controller so it will evaluate this condition and put result to the model

The issue is:
I’m trying to do something like that

<g:if test="${checkCondition()}"> some html here </g:if>

But it fails saying that checkCondition in undefined.

But this works perfectly:

<mytaglib:checkCondition />

The question is:
What should I do to be able to call my function within

<g:if test="${ expression }">

?

Answer 1

Since you have the tag in a namespace (‘mytaglib’) you need to call it as a method with that namespace too:

<g:if test="${mytaglib.checkCondition()}"> some html here </g:if>