Question

I have the following Domain Class:

 class Metric {

   String name
   float value

   static belongsTo = [Person,Corporation]

   static indexes = {
    name()
 }
}

How can I add a constraint so Person,Corporation and name are unique ?

Thanks.

Answer 1

I think this should work..add this to Metric. Obviously you can ignore the nullables if you want.

static constraints = {
        name(blank:false)
        corporation(nullable:false)
        person(nullable:false)

        name(unique:['corporation','person'])
    }

I tested with this integration test and it seemed to work.

def newCorp = new Corporation(name:"Corporation1")
newCorp.save()
def newPerson = new Person(name:"Person1")
newPerson.save()

def newMetric = new Metric(name:"Metric1",corporation:newCorp,person:newPerson)
newMetric.save()

newMetric = new Metric(name:"Metric1",corporation:newCorp,person:newPerson)
newMetric.save()

assertTrue (Metric.list().size == 1)