Is it possible for a entity to contain multiple fields of the same embeddable?

[mazeneko]

Hi, and thank you for the great work on Doma. I really enjoy using it! 😊

import org.seasar.doma.Embeddable;
import org.seasar.doma.Entity;
import org.seasar.doma.Id;

@Entity
record Person(
    @Id Integer id,
    Address homeAddress,
    Address workAddress) {
}

@Embeddable
record Address(
    String city,
    String street,
    String zip) {
}

I’d like to create an entity class like the one above.
However, I couldn’t find a way to achieve this in the documentation or the source code.
Is it currently possible?

Ideally, I’m hoping for something along these lines:

import org.seasar.doma.Embeddable;
import org.seasar.doma.Entity;
import org.seasar.doma.Id;

@Entity
record Person(
    @Id Integer id,
    @EmbeddablePrefix("home") Address homeAddress,
    @EmbeddablePrefix("work") Address workAddress) {
}

@Embeddable
record Address(
    String city,
    String street,
    String zip) {
}

Any guidance would be greatly appreciated. Thank you!

[mazeneko]

Hmmm… perhaps I really should normalize it properly after all.

[nakamura-to]

Thank you for your question.
That feature is not currently supported, but we will consider adding support for it.

[mazeneko]

Thank you for the prompt reply!
I'll keep an eye out for future updates. Thanks again! 😊

[nakamura-to]

@mazeneko We’re planning to introduce @Embedded in PR #1384 to allow you to specify a prefix. Here’s an example of how it will work:

@Embeddable
public record Address(String street, String city, String zipCode) {}

@Entity
public class Customer {
    @Id Integer customerId;
    
    @Embedded(prefix = "billing_")
    Address billingAddress;
    
    @Embedded(prefix = "shipping_") 
    Address shippingAddress;
}

This creates columns: billing_street, billing_city, billing_zip_code, shipping_street, shipping_city, shipping_zip_code.

Would this feature meet your needs? Please feel free to leave any comments or questions.

[mazeneko]

This looks great, thank you!
I do have a small additional feature idea, so I’ll add a comment on the pull request.