![]() ![]() Check the generated DDL for unique indexes on COURSEID, STUDENTID). so just get use to doing it correctly and you wont have the misfortune of finding issues. field level requires hibernate to create a proxy before the field can be access in the case of lazy fetches. Though the hibernate documentation might tell you placing those annotations on the field variables is ok, its a bad idea as a standard. You mapped a Set, which signals Hibernate that these relationships must occur not more than once. Summary: Nested Field Constr Method Detail: Field Constr Method SEARCH: Module java.sql Package java. you know i would start by cleaning up this code. SessionFactory sf = HibernateUtil. Since the violation happens in the STUDENTCOURSES table, it seems like you are trying to persist the same relationship twice. I wonder what should I try to catch that specific exception. I relaunch this code which tries to insert an already existing row in a table but the ConstraintViolationException is catched in the general catch (Exception e) block insted of being catched in the specific catch (ConstraintViolationException e) block as I expected. Hibernate Exception Overview Many conditions can cause exceptions to be thrown while using Hibernate. However, this activates the integrity constraint violation because MySQL. I suppose this must be a very basic question. After completing the two MySQL tables, users should insert values inside the columns. ![]()
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