Using Grails taglibs inside GSPs

Question

Please note: Even though I'm using the Grails-Shiro plugin here, this is a pure Grails taglib question, so should be answerable by anybody who is familiar with Grails taglibs and GSPs, regardless of their experience with this particular plugin.

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Grails 2.4.5 here. I'd like to use some tags inside my GSP to determine if the authenticated user has a permission (string) with a value of 'app_admin'. Something like:

<g:if test="${authenticated_user_has_permission('app_admin')}">
    <!-- A bunch of HTML here, but only for admins! -->
</g:if>

This Grails-Shiro plugin defines a hasPermission tag that I think I could use, but not sure how. My attempt at:

<g:if test="${shiro.hasPermission('app_admin')}">
    <!-- A bunch of HTML here, but only for admins! -->
</g:if>

...failed miserably. Any ideas how I could use this plugin-provided tag as part of my permission check?

Answer 1

never used shiro, but common sense tells me to use something like:

<shiro:hasPermission permission="app_admin">
  ....
</shiro:hasPermission>

you can not use <g:if> here, as shiro tags do not return anything