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Vermeulen edited comment on OPENJPA-2559 at 1/13/15 2:23 PM: ------------------------------------------------------------- As mentioned on the openjpa-dev mailing list, @Column(nullable = false) is a hint for generating the database schema, not a hint for runtime checks. The exception should come from the database itself when it has the correct schema. I still believe this is a bug because no PersistenceException is thrown at all when the entitymanager flushes changes to the database. Additionally, after this situation occurs, the resulting detached entity has a value for the column that is definitely not consistent with what is in the database. This can lead to unexpected problems in the application using OpenJPA for persistence. I guess somehow the null value is skipped instead of issuing an update statement to the database to set the column to null. was (Author: slowstrider): As mentioned on the openjpa-dev mailing list, @Column(nullable = false) is a hint for generating the database schema, not a hint for runtime checks. The exception should come from the database itself when it has the correct schema. I still believe this is a bug because no PersistenceException is thrown at all when the entitymanager flushes changes to the database. I guess somehow the null value is skipped instead of issuing an update to set the column to null. > OpenJPA silently ignores assigning a null value to a non-nullable column > ------------------------------------------------------------------------ > > Key: OPENJPA-2559 > URL: https://issues.apache.org/jira/browse/OPENJPA-2559 > Project: OpenJPA > Issue Type: Bug > Components: kernel > Affects Versions: 2.3.0 > Reporter: Vermeulen > Attachments: NonNullable.java, NonNullableColumnTest.java > > > OpenJPA should throw a PersistenceException when you merge an entity that has > null for a field that is mapped to a non-nullable column (@Column(nullable = > false)). This should also happen when you set the field to null for an > attached entity and then commit the change. > This works fine for entities that haven't been persisted yet (INSERT). > However this does NOT happen for entities that are already persistent with a > non-null value for the field (UPDATE). When doing entityManager.merge, the > returned entity has null for the field, but the database still has the old > value. The entity returned by entityManager.find also returns this old > non-null value. Similarly, after setting the field to null on an attached > entity and committing the transaction it is still null in the entity, but not > in the database. > This behavior makes it a lot harder to detect programming errors where you > accidentally attempt to update a non-nullable column to null, or where you > made a mistake in the mapping and actually expected the column to be > nullable. (Unless you also use the JSR 303 @NotNull annotation.) -- This message was sent by Atlassian JIRA (v6.3.4#6332)