Just for reference, if you come across one of the following problems:
Validation only datasource
Looking at the options of dbCreate in Datasource.groovy I only found 3 values: create-drop, create or update. But there is a fourth one: validate!
This one helps a lot when you use schema generation with Autobase or doing your schema updates external.
Redirect
Controller.redirect has two options for passing an id to the action id and params, but if you specify both which one will be used?
controller.redirect(id:1, params:[id:2])
Trying this out I found the id supersedes the params.id.
Update:
Thanks to Burt and Alvaro for their hints. I submitted a JIRA issue
If you find missing or incorrect information in the docs, you should submit patches to JIRA at http://jira.codehaus.org/browse/GRAILS
Why not sharing this on the mailing list? Maybe rasing a JIRA would even be better.
[...] dark side of Grails – As soon as you start to criticize Grails, there’s a comment reading that you can help make it better, too. Here is story of [...]
[...] still has some bugs. Instead of only complaining about them, we try to fix them. There is a bug with checkboxes and nested boolean properties that bugged us in [...]