(Quick Reference)
constraints
Purpose
Allows the definition of declarative validation constraints. See
Validation in the user guide.
Examples
class Book {
String title
Author author
static constraints = {
title(blank:false, nullable:false, size:5..150)
author(nullable:false)
}
}Description
Constraints are defined using the declarative constraints DSL as described in the
Validation section of the user guide. Once evaluated validation can be applied through the use of the
validate method:
def b = new Book()
assert !b.validate()
A list of
ConstrainedProperty instances applied against the domain class by the
constraints property is available at runtime:
b.constraints.each {
println it.name
println it.maxSize
}
