Question

Suppose I have a class User with many Customers (marked with hasMany property).
In the class Customer I mark the owner with belongsTo.

Now when I want to get user’s customers I simply write User.read(params.id).customers

I want a pagination in my test project, so reading the entire customer list doesnt make much sense.. I’d use something like Customer.findAllByOwner but this method is such a method is not present..

How do I limit the result set of such a query then (offset and limit)?

---

package myapp

class User {
    ...
    static hasMany = [customers: Customer]
    ...
}

package myapp

class Customer {
    ...
    static belongsTo = User
    ...
}

Answer 1

Correct me if I’m wrong, but the idea in its most simplistic form here is that you want to get a list of Customers based off of the User object.

In that case, change your Customer domain class to something like…

class Customer {
   ...
   static belongsTo = [user: User]
   ...
}

Then, in your controller you can do something like:

def customerInstanceList = Customer.findAllByUser(User.get(params.id), [max: params.max, offset: params.offset])

Hope this helps.