Hibernate: Add column in subclass

Question

Is there possibility to add new column in subclass of entity? Something like:

Base class:

@Entity
@Table(name = "users")
public class User {
    @Column
    private String login;
}

Subclass:

@Entity
@Table(name = "users")
public class UserWithField extends User {
    @Column
    private String field;
}

I don't want to change base class (User) at all. Would it work somehow?

So what would be a good practice when i want to add column to base class table without editing base class? — graczun
– graczun, Commented Sep 3, 2016 at 8:08

Abhijeet · Accepted Answer · 2016-09-03 08:11:28Z

1

Just create new class for new entity. Generally,In hibernate inheritance is used when you have two or more related tables.

answered Sep 3, 2016 at 8:11

Abhijeet

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5 Comments

graczun Over a year ago

That's the same solution, which I'm using right now. If no one will post better looking solution i will accept your answer as correct. Thanks

Abhijeet Over a year ago

Ok. But I'm telling you not to extend User class, create UserWithField as separate class having all fields from User class and extra fields of UserWithField class

graczun Over a year ago

Yes - thats what i'm using right now. Just want to know is there any better solution :)

Abhijeet Over a year ago

I don't think there is any alternative. Just wait for some time if any one has it.It will be helpful for me as well

Kamal Chandraprakash Over a year ago

@Abhijeet I have a base class A, Class B extends A and Class C extends B. Using discriminator, I'm able to add the properties and association of Class C in table A. Is it possible to add the props & associations in table B ?

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