Flutter delete Hive Database on Update

Question

I have a Flutter app and I am using Hive to store data.

I have deleted some adapters which were used previously. This caused an error and I have to delete the old database.

Now, if I roll out an update, how do I make sure the old Hive database gets deleted when the user updates the app so that it causes no issues.

Answer 1

Instead of deleting, run a database migration.

Hive.box("myBox", version: 5, migrator: (oldVersion, newVersion, box) async {
  await box.delete("unusedKey");
  await box.put("newKey", 7);
});

If you want to delete it anyway,

• Read the app version, package_info may come in handy for that.
• Delete the old db if this app version/build is running for the first time after installing/updating.