hibernate-mapping – Page 3

Can someone explain mappedBy in JPA and Hibernate?

October 14, 2022 by Tarik

MappedBy signals hibernate that the key for the relationship is on the other side. This means that although you link 2 tables together, only 1 of those tables has a foreign key constraint to the other one. MappedBy allows you to still link from the table not containing the constraint to the other table.

Hibernate – A collection with cascade=”all-delete-orphan” was no longer referenced by the owning entity instance

September 27, 2022 by Tarik

Check all of the places where you are assigning something to sonEntities. The link you referenced distinctly points out creating a new HashSet but you can have this error anytime you reassign the set. For example: public void setChildren(Set<SonEntity> aSet) { this.sonEntities = aSet; //This will override the set that Hibernate is tracking. } Usually … Read more