Map iteration with g:each tag as it was in Grails 1.x.x

In Grails 1.x.x it was possible to iterate a map in a clean, intuitive way with the g:each tag:

<g:each in="$

{myMap}" var="key, value">
...
</g:each>

This is no longer possible due to some internal reworking of the taglibs, and the following stacktrace is shown:


Line | Method
->> 13 | runTask in /grails-app/views/versions/index.gsp
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Caused by MultipleCompilationErrorsException: startup failed:
home_ant_Projects_nice_map_iteration_grails_app_views_versions_index_gsp: 25: unexpected token: project @ line 25, column 6.
for( project, version in evaluate('versions', 13, it) { return versions } ) {
^

1 error

The workaround is not very clean:

<g:each in="${myMap}

" var="mapEntry">
<g:set var="key" value="$

{mapEntry.key}

" />
<g:set var="value" value="$

{mapEntry.value}

" />
...
</g:each>

My suggestion is to adapt the new taglib to check for maps as the 'in' variable, and if a comma is found in the 'var' string, assign key+value to the two variable names.

Example application attached.