Grails - entityName is null

Question

Grials newbie - my boilerplate, generated view code is returning null when trying to resolve the entityName argument passed to the g:message tag. So...

<g:message code="default.show.label" args="[entityName]" />

renders as "Show null" instead of "Show [the domain class name]"

Any idea what may be going on here, or suggestions on how to diagnose this? I have been making incremental changes to both the views and the domain classes but wouldn't expect this to have made any difference

Answer 1

entityName is a variable and set by the set tag lib, which must placed before the message tags using this variable. e.g.

// first define the entity name var
<g:set var="entityName" value="${message(code: 'test', default: 'TEST')}"/>
// display msg
<g:message code="default.show.label" args="[entityName]" />

maybe you forget to define this var or accidentally deleted this line of code.