Using grails service in domain class

Question

I want to use a service in my Grails application. However, it is always null. I am using Grails version 1.1. How can I solve this problem?

Sample code:

 class A{
      String name;
      def testService;
      static transients=['testService']
 }

Can I use a service inside a domain class?

Answer 1

That should work. Note that since you're using 'def' you don't need to add it to the transients list. Are you trying to access it from a static method? It's an instance field, so you can only access it from instances.

The typical use case for injecting a service into a domain class is for validation. A custom validator gets passed the domain class instance being validated, so you can access the service from that:

static constraints = {
   name validator: { value, obj ->
      if (obj.testService.someMethod(value)) {
         ...
      }
   }
}