from django.db import migrations, models def grow_tail(x, y): """Grow salamander tail.""" pass def shrink_tail(x, y): """Shrink salamander tail.""" pass class Migration(migrations.Migration): initial = True operations = [ migrations.CreateModel( "Salamander", [ ("id", models.AutoField(primary_key=True)), ("tail", models.IntegerField(default=0)), ("silly_field", models.BooleanField(default=False)), ], ), migrations.RunPython(grow_tail, shrink_tail), ]