hibernate - Parameter value did not match expected type (Spring Data JPA) -

let's have class , b

public class a{ @id string id; private b b; }  public class b{ @id string id; private list<a> a; } 

i'm using @queryfor query since query long query creation .

@query("select a  b = :b") public list<a> findsomething(@param("b") string bid); 

however, when use query shows

parameter value  did not match expected type [b (n/a)] 

please change query "select a a.b.id = :b". work