CODEWITHSUNDEEP
javahibernatejpapersistence
radai
radai

Reputation: 24192

add a unique constraint for a column only on subclass

i have a superclass that defines a name column:

@MappedSuperclass
public class SuperClass {
   @Basic
   private String name;
}

there are plenty of concrete @Entity subclasses that extend it, but for one of them i'd like to add a unique constraint on the name column. i cannot just add @Column(unique=true) on the superclass, since thats not correct for all of its subclasses.

how do i redefine the name column in a subclass to be unique? (note: my model maps fields, not getter methods)

Upvotes: 2

Views: 885

Answers (1)

birya
birya

Reputation: 340

try @AttributeOverride( name="name", column = @Column(name="new_name", unique=true) on your subclass. And then you have to change your column 'name' to 'new_name' in db for the table on which subclass is mapped

Upvotes: 2

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