HHH-19732 Fix wrong resetting of owned on-delete action when processing inverse collection

Author: beikov

hibernate-core/src/main/java/org/hibernate/boot/model/internal/CollectionBinder.java

@@ -44,6 +44,7 @@
 import org.hibernate.mapping.Selectable;
 import org.hibernate.mapping.SimpleValue;
 import org.hibernate.mapping.Table;
+import org.hibernate.mapping.ToOne;
 import org.hibernate.mapping.Value;
 import org.hibernate.metamodel.CollectionClassification;
 import org.hibernate.metamodel.UnsupportedMappingException;
@@ -2702,6 +2703,13 @@ private void bindUnownedManyToManyInverseForeignKey(
 			manyToOne.setReferencedPropertyName( referencedPropertyName );
 			metadataCollector.addUniquePropertyReference( targetEntity.getEntityName(), referencedPropertyName );
 		}
+		// Ensure that we copy over the delete action from the owner side before creating the foreign key
+		if ( property.getValue() instanceof Collection collectionValue ) {
+			manyToOne.setOnDeleteAction( ( (SimpleValue) collectionValue.getKey() ).getOnDeleteAction() );
+		}
+		else if ( property.getValue() instanceof ToOne toOne ) {
+			manyToOne.setOnDeleteAction( toOne.getOnDeleteAction() );
+		}
 		manyToOne.setReferenceToPrimaryKey( referencedPropertyName == null );
 		value.createForeignKey();
 	}

hibernate-core/src/test/java/org/hibernate/orm/test/ondeletecascade/OnDeleteManyToManyTest.java

@@ -88,5 +88,8 @@ static class A {
 	static class B {
 		@Id
 		long id;
+		@ManyToMany(mappedBy = "bs")
+		@OnDelete(action = OnDeleteAction.CASCADE)
+		Set<A> as = new HashSet<>();
 	}
 }