Gorm mapping for inheritance

Question

I'm facing a issue regarding inheritance in Grails. I have a domain class Person.grooy:

class Person{
    String name
    String contactNumber
    Address address
} 

Now I'm extending Person.groovy for Employee and Customer like:

class Employee extends Person{
    String designation
}
class Customer extends Person{
    String interest
}

Now I want separate table in my database for Employee and Customer having columns of Person i.e name,contactNumber and associate address key. How could I achieve this. I searched every where but there is nothing for this aspect. Is this one approach is not possible in GORM. Please answer. Thanks Guys

Answer 1

Finally I managed to get what I want just by placing a grails.persistence.Entity annotation to my child domain classes. I also make my parent i.e. Person.groovy abstract and place in src/groovy.

Now I have database hierarchy as I expected but some scaffold issues in controller still persist that will also sorted out with your help.

Answer 2

You need to disable table-per-hierarchy, which is by default enabled in Grails

class Employee extends Person{
    String designation

static mapping = {
        tablePerHierarchy false
    }
}

table-per-hierarchy Ref

Answer 3

If you put your Person class in src/java or src/groovy it won't be mapped to the db.

Remember to import it into your Employee and Customer classes

import com.yourPackage.Person

class Employee extends Person{

}