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), ]