HHH-13721 Getting duplicated entities with @OneToMany and @ElementCollection

hibernate-core/src/test/java/org/hibernate/orm/test/mapping/access/ElementCollectionInOneToManyTest.java

@@ -0,0 +1,120 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.mapping.access;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.ElementCollection;
+import jakarta.persistence.Embeddable;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+@JiraKey(value = "HHH-13721")
+@DomainModel(
+		annotatedClasses = {
+				ElementCollectionInOneToManyTest.Author.class, ElementCollectionInOneToManyTest.Book.class
+		}
+)
+@SessionFactory
+public class ElementCollectionInOneToManyTest {
+
+	@Test
+	void hhh13721Test(SessionFactoryScope scope) {
+
+		// prepare data
+		scope.inTransaction( session -> {
+
+			Chapter c1 = new Chapter();
+			c1.name = "chapter1";
+
+			Chapter c2 = new Chapter();
+			c2.name = "chapter2";
+
+			Chapter c3 = new Chapter();
+			c3.name = "chapter3";
+
+			Book book = new Book();
+			book.name = "book";
+			book.chapters.add( c1 );
+			book.chapters.add( c2 );
+			book.chapters.add( c3 );
+
+			Author author = new Author();
+			author.name = "author";
+			author.books.add( book );
+
+			session.persist( author );
+		} );
+
+		// find and assert
+		scope.inTransaction( session -> {
+
+			Author author = session.createSelectionQuery( "select a from Author a", Author.class ).getSingleResult();
+			assertNotNull( author );
+			assertEquals( "author", author.name );
+			assertEquals( 1, author.books.size() );
+
+			Book book = author.books.getFirst();
+			assertEquals( "book", book.name );
+			assertEquals( 3, book.chapters.size() );
+
+			List<String> chapters = book.chapters.stream().map( c -> c.name ).toList();
+			assertTrue( chapters.contains( "chapter1" ) );
+			assertTrue( chapters.contains( "chapter2" ) );
+			assertTrue( chapters.contains( "chapter3" ) );
+		} );
+	}
+	@AfterAll
+	public void tearDown(SessionFactoryScope scope) {
+		scope.getSessionFactory().getSchemaManager().truncateMappedObjects();
+	}
+	@Entity(name = "Author")
+	public static class Author {
+
+		@Id
+		@GeneratedValue
+		long id;
+
+		String name;
+
+		@OneToMany(cascade = CascadeType.ALL)
+		List<Book> books = new ArrayList<>();
+	}
+
+	@Entity(name = "Book")
+	public static class Book {
+
+		@Id
+		@GeneratedValue
+		long id;
+
+		String name;
+
+		@ElementCollection
+		Collection<Chapter> chapters = new ArrayList<>();
+	}
+
+	@Embeddable
+	public static class Chapter {
+
+		String name;
+	}
+
+}