Read collection in one-to-many

Question

Hi,
I have an object with a one-to-many relationship with another object.
When I read the object through a read all object query and try to get the size of the collection object for each result the performance goes down. It gets 3 seconds to access the size of a collection for 400 entries. Hence, is there a way of getting this size in the query result, so that I do not have to access the collection object to get its size? Could not suceed with batch or join reads.
Thanks.

Answer 1

The problem is that when you send size() to the collection, you're reading in all the elements of the collection.
You're on the right track about not accessing the collection to avoid lazy loading. One solution is to use a ReportQuery to return a count of the number of objects that match a specific criteria, say 'the count of all the objects of a certain class who's owner is a specified object'. You'll pay the cost of the query but not the cost of reading the collection contents.
--Shaun