How about bundling in a bunch of custom validators you use this with? about grails-constraints HOT 2 OPEN

I'm not opposed to that idea, but most of what I expect people to use it for is domain specific stuff. I'm open to suggestions on others to add though.

from grails-constraints.

There are a number of "generic" validations that I've needed for projects, particularly when dealing with dates, that I think would fit well into a set of samples, including validations along the lines of dueDate before: 'startDate'. If I get time, I'll put some together into a pull request.

There are other things like this, but they are more in the vein of augemnting existing constraints, like min:, max:, and range: to handle dates or making range: be able to handle references to other fields, but that may beyond the scope and capabilities of this plugin.

from grails-constraints.