There's a simple way if you have a A ->> B, to fetch all the A's having no B's :
EOQualifier qual = ERXQ.isNull(A.TO_BS_KEY + "." + B.ID_KEY);
Beware, the to-many relationship must be of type "Left Outer" in your model
Hope it helps.
Alex
Le 11 mai 2011 à 23:29, Fred Wells a écrit :
> Hey all,
> Maybe I missed something but is there a way to construct a qualifier that
> check that a toMany relationship is empty? Simply putting in "toMany =%@, new
> NSArray(new Object[] {NSKeyValueCoding.NullValue}doesn't do it because it
> tries to check across the join table which results in no objects being found.
>
> -fw
>
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