问题
Trying to follow the tutorial at Django project.
The problem I've come across is that when performing the command:
python manage.py sql polls I'm given the error:
CommandError: App 'polls' has migrations. only the sqlmigrate and sqlflush commands can be used when an app has migrations
So far I can't seem to find any guide on the internet, or this website for a solution to the program.
回答1:
The problem is that you are using Django 1.8 while going through 1.6 tutorial. Pay attention to the first words at the beginning of the tutorial:
This tutorial is written for Django 1.6 and Python 2.x. If the Django version doesn’t match, you can refer to the tutorial for your version of Django by using the version switcher at the bottom right corner of this page, or update Django to the newest version.
In your case, either downgrade to 1.6, or use the tutorial for the development (currently 1.8) version.
回答2:
You can either run python manage.py makemigration followed by python manage.py migrate or just delete migrations folder
回答3:
Simply delete folder app-name/migrations.
In Django 1.7 and Python 3.4 the solution I found is to delete this folder and everything works now.
回答4:
With django 1.7, instead of deleting app-name/migrations folder, In your MIGRATION_MODULES entry of your site, you can rename the application dictionary value with an non-existing module name by adding some dummy string:
MIGRATION_MODULES['my_app'] += '_xx'
And then manage.py sqlclear my_app works fine.
回答5:
In Django 1.8, you should run another command--makemigrations [your app name]:
$ python manage.py makemigrations polls
You should see something similar to the following:
Migrations for 'polls':
0001_initial.py:
- Create model Question
- Create model Choice
- Add field question to choice
来源：https://stackoverflow.com/questions/24215005/django-commanderror-app-polls-has-migrations