Error while trying to run dart run moor_generator migrate

[Shashank-Girish]

Hi, I am migrating my app from flutter 3.0.1 to 3.19.0 and all the packages within. While trying to migrate from moor to drift using dart run moor_generator migrate , I encountered the following error

Failed to build moor_generator:moor_generator:
../../../.pub-cache/hosted/pub.dev/moor_generator-4.6.0+1/bin/moor_generator.dart:1:1: Error: Library doesn't support null safety.
//@dart=2.9

The following are my versions in pubspec.yaml
moor_flutter: ^4.0.0
moor_generator: ^4.6.0

Any idea how to solve this?

[simolus3]

Hm, you might have to migrate to drift on the older Flutter version and do the upgrade afterwards.
I haven't tried this, but what might also work is adding a dependency on drift_dev right away and then running dart run drift_dev migrate instead.

[Shashank-Girish]

I tried it, didn't work. Same error persisted.

[simolus3]

Really, the same error? With moor_generator appearing in the error message? Did you run dart run drift_dev migrate? Drift is fully migrated to null safety so this surprises me.

[Shashank-Girish]

Yeah, the same error persisted, so I manually migrated off