hasManyBy for Many To Many?

Describe the feature

I have a backend with contact and contact emails that get serialized out like this:

a contact:

{
  "id": 1,
  "name": "Wanda",
  "emails": [
    {
      "id": 10,
      "contact_ids": [1],
      "email_address": "[e-mail]"
    }
  ]
}

On the backend, these models are related many-to-many. There should be a way for pinia-orm to be able to save either a contact or contact email and have the relationships work even when the backend data coming in is an array of ids instead of a serialized object, similar to hasManyBy but works with a pivot table.

Additional information

• Would you be willing to help implement this feature?
• Could this feature be implemented as a module?

Final checks

• Check existing discussions and issues.

[salcedo]

That’ll do it. Thank you so much.

[CodeDredd]

What about this solution?

export class Contact extends Model {
  static fields() {
    return {
      id: this.uid(),
      name: this.string(""),
      emails: this.belongsToMany(
        ContactEmail,
        ContactEmailContact,
        "contactId",
        "contactEmailId"
      ),
    };
  }
}
Contact.entity = "contacts";

export class ContactEmail extends Model {
  static fields() {
    return {
      id: this.uid(),
      email_address: this.string(""),
      contacts: this.attr([]),
      contactObjects: this.hasManyBy(Contact, 'contacts')
    };
  }
  static saving(model) {
    useRepo(ContactEmailContact).save(model.contacts.map(contactId => ({
      contactEmailId: model.id,
      contactId: contactId
    })))
  }
  static deleting(model) {
    useRepo(ContactEmailContact)
    .whereIn('contactId', model.contacts)
    .where('contactEmailId', model.id)
    .delete()
  }
}
ContactEmail.entity = "contact_emails";

class ContactEmailContact extends Model {
  static fields() {
    return {
      contactEmailId: this.uid(),
      contactId: this.uid(),
    };
  }
}
ContactEmailContact.entity = "contact_email_contact";
ContactEmailContact.primaryKey = ["contactEmailId", "contactId"];