Core Data predicate : unimplemented SQL generation for predicate

Question

Basically I got 3 entities in my data model : Brand, Model and Trim.

• A brand has a one-to-many relationship with Model called \"models\". (one brand have multi

Answer 1

"ANY" in a Core Data predicate works only for a single to-many relationship. Since your query involves two to-many relationships, you have to use a SUBQUERY:

[NSPredicate predicateWithFormat:@"SUBQUERY(models, $m, ANY $m.trims IN %@).@count > 0",
    arrayOfTrims];