User_Role: implement deleteByCompositeId method

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>

bookstore/src/main/java/com/fjordtek/bookstore/model/auth/UserRoleRepositoryCustom.java

@@ -11,4 +11,6 @@ package com.fjordtek.bookstore.model.auth;
 
 public interface UserRoleRepositoryCustom {
 	UserRole findByCompositeId(Long userId, Long roleId);
+
+	void deleteByCompositeId(Long userId, Long roleId);
 }

bookstore/src/main/java/com/fjordtek/bookstore/model/auth/UserRoleRepositoryImpl.java

@@ -4,6 +4,7 @@ package com.fjordtek.bookstore.model.auth;
 
 import javax.persistence.EntityManager;
 import javax.persistence.PersistenceContext;
+import javax.persistence.Query;
 import javax.persistence.TypedQuery;
 
 import org.springframework.transaction.annotation.Transactional;
@@ -45,4 +46,17 @@ public class UserRoleRepositoryImpl implements UserRoleRepositoryCustom {
 		}
 	}
 
+	@Override
+	public void deleteByCompositeId(Long userId, Long roleId) {
+
+		Query query = entityManager.createQuery(
+				"DELETE FROM UserRole" +
+				" WHERE user_id = :user_id" +
+				" AND role_id   = :role_id"
+				);
+		query.setParameter("user_id", userId);
+		query.setParameter("role_id", roleId);
+		query.executeUpdate();
+	}
+
 }