Hibernate is smart enough not to send insert/updates to the Database until it knows if the transaction will be committed or rolled back. Lets understand the different Transaction : When you make a session session. save(a) Hibernate essentially remembers that this object needs to be saved somewhere inside the session. It may determine whether INSERT […]
JPA ASSOCIATIONS : Il existe plusieurs type d’associations entre entités :• One to One (1:1) -Unidirectionnelle / Bidirectionnelle• One to Many (1:N) -Unidirectionnelle / Bidirectionnelle• Many to One (N:1) -Unidirectionnelle / Bidirectionnelle• Many to Many (N:M) -Unidirectionnelle / Bidirectionnelle– TP : Mise en oeuvre des différentes associations JPA ASSOCIATIONS : • One To One entre […]
Why in “One to Many” Mapping hibernate data is getting inserted in child table while updating parent table ? Solution : You are using cascade = CascadeType.ALL in both @OneToMany mappings of your Sets. This means that whatever operation done on the parent entity, will be propagate also to the child entity That is when […]
If Hibernate does not insert element in child table , The reason is because the mapping does not cascade the persist operation. Example : The solution is : Cascade operations are extremely useful, but be mindful of their potential side effects, particularly if you modify Ticket which you don’t intend for an operation to be […]
How to fix the Hibernate “object references an unsaved transient instance – save the transient instance before flushing” error ! SOLUTION : You should include on your collection mapping: (if using xml) or (if using annotations) This happens because you have a collection in your entity, and that collection has one or more items which […]
Request processing failed; nested exception is org.hibernate.HibernateException: No Session found for current thread Solution : If you have this exception using Hibernate , that mean that you forgot the annotation @Transaction in your service implement class function that caused this Exception.