Is there a 'contains' functionality on a collection property of a domain object for createCriteria?

问题

I have an Auction domain object and a User domain object. An Auction hasMany Users.

What I'd like to do, using createCriteria, is something like this:

def c = Auction.createCriteria()
def l = c.list (max: maxVar, offset: offsetVar) {
    contains("users", thisUser)
}

Though, contains is not in the list of acceptable nodes: createCriteria description page.

Is there any way to implement this functionality?

To be clear, is there a way to have the criteria be that a specified User object is contained within a collection property of the Auction?

回答1:

Try this:

def l = c.list (max: maxVar, offset: offsetVar) {
    users {
        idEq(thisUser.id)
    }
}

来源：https://stackoverflow.com/questions/11475009/is-there-a-contains-functionality-on-a-collection-property-of-a-domain-object