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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