Org.hibernate.PersistentObjectException:detached entity passed to persist this exception has occurred:

Exception information: caused by:org.hibernate.PersistentObjectException:detached entity passed to Persist:com.xxx.Xxx

Simply put, this exception occurs when a free object is to be persisted (save), whose ID is both the ORM framework generates an ID value for it, and the ID of this entity already has a value.

The solution is many, the author is to do a property editor for its entity, in the editor to determine whether the primary key ID is empty and the length is 0, if so, then place a null. Checking the ID before saving is also a workaround.

Sometimes in a one-to-one, one-to-many save, this is also the case for the associated party, so the key check ID field is available.

Org.hibernate.PersistentObjectException:detached entity passed to persist this exception has occurred: