Django Migration Error: Column does not exist

Question

Python 3, Django 1.8.5, Postgres

I have a model Sites that has been working fine. I recently tried to add a field, airport_code, and migrate the data.

Answer 1

Run into this problem after the migration of my postgres database to a differnt server. Somehow I messed up the database and could not update my model with the new class UserProfile.

I solved the problem creating initial migration for existing schema:

1. Empty the django_migrations table: delete from django_migrations;with a command DELETE FROM django_migrations WHERE app='my_app';
2. For every app, delete its migrations folder: rm -rf /migrations/
3. Reset the migrations for the "built-in" apps: python manage.py migrate --fake
4. For each app run: python manage.py makemigrations . Take care of dependencies (models with ForeignKey's should run after their parent model).
5. Finally: python manage.py migrate --fake-initial

Got it here: https://stackoverflow.com/a/29898483

PS I'm not sure that this was relevant to the resolution of the problem but, first, I dropped the table in postgresql that caused an error and commented out the UserProfile class in models.

in shell:

 sudo -su postgres
 psql databse_name   
 DROP TABLE table_name;

models.py:

#class UserProfile(models.Model):
    #user = models.OneToOneField(settings.AUTH_USER_MODEL, unique=True, primary_key=True, on_delete=models.CASCADE, related_name='user_profile')
    #avatar = ThumbnailerImageField(upload_to='profile_images', blank=True)
    #country = models.CharField(max_length = 128)