HHH-12996 - Reproducer for missing property paths of IdClass attributes

hibernate-core/src/test/java/org/hibernate/test/idclass/NestedIdClassQueryTest.java

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+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.test.idclass;
+
+import java.io.Serializable;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.IdClass;
+import javax.persistence.ManyToOne;
+
+import org.hibernate.testing.FailureExpected;
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
+import org.junit.Test;
+
+import static org.hibernate.testing.transaction.TransactionUtil.doInHibernate;
+
+@TestForIssue( jiraKey = "HHH-12996" )
+public class NestedIdClassQueryTest extends BaseCoreFunctionalTestCase {
+
+	@Entity(name = "BasicEntity")
+	public static class BasicEntity {
+		@Id Long key1;
+	}
+
+	@Entity(name = "IdClassEntity")
+	@IdClass( IdClassEntity.IdClassEntityId.class )
+	public static class IdClassEntity {
+		@Id @ManyToOne BasicEntity basicEntity;
+		@Id Long key2;
+
+		public static class IdClassEntityId implements Serializable {
+			Long basicEntity;
+			Long key2;
+		}
+	}
+
+	@Entity(name = "NestedIdClassEntity")
+	@IdClass( NestedIdClassEntity.NestedIdClassEntityId.class )
+	public static class NestedIdClassEntity {
+		@Id @ManyToOne IdClassEntity idClassEntity;
+		@Id Long key3;
+
+		public static class NestedIdClassEntityId implements Serializable {
+			IdClassEntity.IdClassEntityId idClassEntity;
+			Long key3;
+		}
+	}
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class<?> [] { BasicEntity.class, IdClassEntity.class, NestedIdClassEntity.class };
+	}
+
+	@Test
+	@FailureExpected( jiraKey = "HHH-12996")
+	public void test() {
+		doInHibernate( this::sessionFactory, s -> {
+			s.createQuery( "SELECT a.idClassEntity.basicEntity.key1 FROM NestedIdClassEntity a " ).getResultList();
+		} );
+	}
+
+}