Cascade Annotations

Question 1

CascadeType.PERSIST

Answer 1

When the parent is persisted, the child entities are also persisted
@OneToMany(mappedBy = “parent”, cascade = CascadeType.PERSIST)
private List<Child> children;</Child>

Question 2

CascadeType.MERGE

Answer 2

When the parent is merged (updated), the child entities are also merged.

Question 3

CascadeType.REMOVE

Answer 3

When the parent is removed, the child entities are also removed.

Question 4

CascadeType.REFRESH

Answer 4

When the parent is refreshed, the child entities are also refreshed to reflect the latest state from the database.

Question 5

CascadeType.DETACH

Answer 5

When the parent is detached, the child entities are also detached.

Question 6

CascadeType.ALL

Answer 6

Includes all of the above cascade types.

Question 7

Example

Answer 7

@OneToMany(mappedBy = “parent”, cascade = CascadeType.ALL, orphanRemoval = true)
private List<Child> children = new ArrayList<>();
When you save or delete a Parent entity, the associated Child entities will also be saved or deleted.</Child>