我想在模型中添加新字段

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

}


而且我不想进行任何迁移,所以

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()
    }
}


但是我仍然收到io.realm.exceptions.RealmMigrationNeededException异常:由于以下错误,需要进行迁移:
                  -添加了类'NoteModel'的主键。
                  -属性'NoteModel.id'已添加。

它发生在onCreate方法(MainActivity.java)中。

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


我应该怎么办?
从此处获取信息:"realm migration needed", exception in android while retrieving values from realm db

最佳答案

创建上述配置后,您需要调用Realm.setDefaultConfiguration(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); // <---
    }
}

关于android - 无法避免io.realm.exceptions.RealmMigrationNeededException,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/47716907/

10-15 15:23