Question

I couldn’t delete entitys from db. I have two class one of them is receipt and other is serving. Receipt has

    @ElementCollection
@OneToMany(cascade={CascadeType.ALL}, orphanRemoval=true)
public List<Serving> servings;

And i’m tring to delete a serving from a controller.

Serving serving = Serving.findById(servID);
serving.delete();

The result is;

Execution exception
PersistenceException occured : org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update

Answer 1

Something like:

Receipt receipt = serving.getReceipt();
receipet.setServings(receipt.getServings().remove(serving));

Since the Receipt is the OO owner of its Servings, from an OO perspective Receipt must know when a Serving is deleted.

Maybe write a finder on Receipt for either a Serving or a servingId.

(Are you sure Servings shouldn’t know about which Receipt it belongs to? – the orphanRemoval seems to indicate that a Serving really belongs to one and only one Receipt)