Custom constructor error with Realm model class

Question

Realm throws the following error message if you have a custom constructor within the Realm model class.

Class <class name> must declare a public constructor with no arguments if it contains custom constructors

Below is the Realm model class.

@RealmClass
public class User implements RealmModel {

public User(Integer id, String email) {
    this.id = id;
    this.email = email;
}

How do you get rid of it?

Answer 1

Realm requires every Realm model class to have a public constructor with no arguments. This is because of the method createObject(Class<E> clazz). For example, to get the User class to work, it'd look like the following.

@RealmClass
public class User implements RealmModel {

public User() {

}

public User(Integer id, String email) {
    this.id = id;
    this.email = email;
}