realm android - how to update specific tables or values on migration without changing the rest

Question

I have changed realm database file in assets and I'd like to make some changes in the current db but all the rest should remain the same so I can't deleteOnMigrationNeeded. I need to update only one table and only specific values in another. How can I access the new realm in Migration.class to retrieve new values from there? Or how I can solve my problem generally?

This is the way config looks:

RealmConfiguration config = new RealmConfiguration.Builder()
            .name("data.realm")
            .schemaVersion(1)
            .migration(new Migration())
            .assetFile("data.realm")
            .build();

"migrate" method in Migration.class is now empty

Answer 1

如果仅要更新几个值而不是迁移整个数据库，则应在应用启动的初始阶段（如启动屏幕中）搜索和更新该特定值。