Grails - createCriteria returns javassist instances instead of specific domain

Question

I'm using the following criteria to retrieve all Person objects that have certain roles granted (in the PersonService):

@Transactional(readOnly = true)
List findAllByRoles(authorities) {
    Person.createCriteria().list {
            personRoles {
                role {
                    'in'('authority', authorities)
                }
            }
            order('name', 'asc')
        }.unique(false)
}

I now have the problem that it returns a List with Person__$$__javassist_67 objects rather than Person objects.

How could I alter the statement in order to retrieve Person objects?

EDIT:

I need this because I'm using the list I get here in connection with another list of Person objects. As I wanted to use removeAll on one of the two lists both need to contain objects of the same type what was not the case.

The better question is why are the proxy objects causing a problem for you? — James Kleeh, Dec 03 '15 at 14:41
Normally they wouldn't but I'm using the list I get here in connection with another list of `Person` objects. As I wanted to use `removeAll` on one of the two lists both need to contain objects of the same type what was not the case. — gabriel, Dec 03 '15 at 15:29
So the issue is the `equals` method. You can implement that method to check against any unique identifier and that process will work, proxy or not — James Kleeh, Dec 03 '15 at 18:39
Thanks, that helped a lot. Enter it as an answer and you'll get the credit - I have updated my question accordingly. — gabriel, Dec 04 '15 at 08:19

score 1 · Accepted Answer · answered Dec 06 '15 at 15:01

1

Implement the equals method on Person to be able to identify if 2 instances are equal, which will work across proxy

answered Dec 06 '15 at 15:01

James Kleeh

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score 0 · Answer 2 · answered Dec 03 '15 at 14:12

The Person__$$__javassist_67 object is just a proxy for the Person class in this instance, caused most likely by lazy fetching. I'm not sure why you are getting it in this situation. I would attempt to explicitly set the fetchMode:

import org.hibernate.FetchMode
...
Person.createCriteria().list {
    fetchMode("personRoles", FetchMode.JOIN)
    fetchMode("role", FetchMode.JOIN)
    personRoles {
        role {
            'in'('authority', authorities)
        }
    }
    order('name', 'asc')
}.unique(false)

You may not need the second fetchMode.

Grails - createCriteria returns javassist instances instead of specific domain

2 Answers2