What is the meaning of the CascadeType.ALL for a @ManyToOne JPA association

Question

I think I misunderstood the meaning of cascading in the context of a @ManyToOne relationship.

The case:

public class User {

   @OneToMany(fetch = FetchType.EAGER)

   protected Set<Address> userAddresses;

}

public class Address {

   @ManyToOne(fetch = FetchType.LAZY, cascade = CascadeType.ALL)

   protected User addressOwner;

}

What is the meaning of the cascade = CascadeType.ALL? For example, if I delete a certain address from the database, how does the fact that I added the cascade = CascadeType.ALL affect my data (the User, I guess)?

Answer 1

CascadeType.ALL means it will do all actions. 

CascadeType.PERSIST: While persisting an entity, it also persist the entities present in its fields. We recommend a liberal application of this cascade rule, because in case the EntityManager finds a field that references a new entity during the flush, and the field does not use CascadeType.PERSIST, then it is an error.

CascadeType.REMOVE: While deleting an entity, it also deletes the entities present in this field.

CascadeType.REFRESH: Whilerefreshing an entity, it also refreshes the entities present in this field.

CascadeType.MERGE: While merging entity state, it also merges the entities present in this field.

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