Can't avoid io.realm.exceptions.RealmMigrationNeededException

Question

I'm want to add new field in my model

public class NoteModel extends RealmObject {
    @PrimaryKey
    private int id; //new field
    private String note;
    private String header;
    private Date date;
    /*
     * few getters and setters
     */

}

And I don't want to make any migrations so

public class BaseApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        Realm.init(this);
        //if I'm right it's delete all data from db and change it's schema (that's OK for me)
        RealmConfiguration config = new RealmConfiguration.Builder()
                .deleteRealmIfMigrationNeeded()
                .build()
    }
}

But I still got exception io.realm.exceptions.RealmMigrationNeededException: Migration is required due to the following errors: - Primary Key for class 'NoteModel' has been added. - Property 'NoteModel.id' has been added.

It's happens in onCreate method (MainActivity.java).

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
realm = Realm.getDefaultInstance();      //error right here

What should I actually do? Get information from here: "realm migration needed", exception in android while retrieving values from realm db

EpicPandaForce · Accepted Answer · 2017-12-08T17:20:57.450

You need to call Realm.setDefaultConfiguration(config) after creating said config.

public class BaseApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        Realm.init(this);
        RealmConfiguration config = new RealmConfiguration.Builder()
                .deleteRealmIfMigrationNeeded()
                .build()
        Realm.setDefaultConfiguration(config); // <---
    }
}

Can't avoid io.realm.exceptions.RealmMigrationNeededException

1 Answers1