django.db.utils.IntegrityError: column “venue_city” contains null values

Question

I have read a lot of other posts here on stackoverflow and google but I could not find a solution.

It all started when I changed the model from a CharField to a For

Answer 1

follow the below steps:-

• add null=True, blank=True in Venue model class eg: venue_city = models.ForeignKey(City, null=True, blank=True)
• delete venues.0016_auto_20160514_2141 migration file from migrations folder in your app
• then run python manage.py makemigrations
• then run python manage.py migrate

no need to drop table or remove migrations from migration tables