I'm running Django 1.6.6 on production and have recently upgraded to 1.9.7 on staging (dev server). This update was performed on the server and I followed the steps outlined here Upgrading from South.
I noticed that the structure of the migration files have changed, and they no longer include a create statement. This causes issues because if I pull this new code from my GitHub repo and run python manage.py makemigrations or python manage.py migrate, it says:
django.db.utils.OperationalError: no such table: appname_modelname
The traceback points to my urls.py because I'm referencing the model in a queryset:
queryset=list(chain(models.modelname.objects.filter(booleanField=True).order_by(object), models.aDifferentModel.objects.all())),
Prior to the 1.9 upgrade, syncdb created the tables for me, but this isn't the case with migrate. I've also tried python manage.py migrate --run-syncdb but this gives the same error.
However, if I copy the SQLite database from my production or staging environments to my local machine and run the command, it works (because the table is already in the database).
Do I have to manually create these tables (though I assume not) or am I doing something wrong?
Edit: Added code snippets and tracebacks. Sorry for not doing this initially.
models.py
class HowToApply(models.Model):
title = models.CharField(max_length=500, blank=True, null=True)
notice = models.TextField(blank=True, null=True)
description = models.TextField(blank=True, null=True)
active = models.BooleanField(default=None)
image = models.FileField(upload_to='numeric/img/%Y', blank=True, null=True)
mobile_image = models.FileField(upload_to='mobile/img/%Y', blank=True, null=True)
sequence_number = models.IntegerField(unique=True)
...
urls.py
from django.conf.urls import patterns, include, url
from django.views.generic import RedirectView, TemplateView, ListView, CreateView
from numeric import models, forms, views
from honeypot.decorators import check_honeypot
from numeric.views import CheckDeviceView
from itertools import chain
urlpatterns = patterns('',
url(r'^academy/howtoapply/$',
ListView.as_view(
queryset = list(chain(models.HowToApply.objects.filter(active=True).order_by('sequence_number'), models.AcademyAdmin.objects.all())),
template_name = 'numeric/apply.html'
),
name='apply'),
...
traceback
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 350, in execute_from_command_line
utility.execute()
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 342, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 348, in run_from_argv
self.execute(*args, **cmd_options)
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 398, in execute
self.check()
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 426, in check
include_deployment_checks=include_deployment_checks,
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/core/checks/registry.py", line 75, in run_checks
new_errors = check(app_configs=app_configs)
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/core/checks/urls.py", line 10, in check_url_config
return check_resolver(resolver)
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/core/checks/urls.py", line 19, in check_resolver
for pattern in resolver.url_patterns:
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/utils/functional.py", line 33, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/core/urlresolvers.py", line 417, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/utils/functional.py", line 33, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/core/urlresolvers.py", line 410, in urlconf_module
return import_module(self.urlconf_name)
File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
File "/var/www/website_mig/project/urls.py", line 14, in <module>
(r'^', include('numeric.urls')),
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/conf/urls/__init__.py", line 52, in include
urlconf_module = import_module(urlconf_module)
File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
File "/var/www/website_mig/numeric/urls.py", line 144, in <module>
queryset = list(chain(models.HowToApply.objects.filter(active=True).order_by('sequence_number'), models.AcademyAdmin.objects.all())),
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/db/models/query.py", line 258, in __iter__
self._fetch_all()
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/db/models/query.py", line 1074, in _fetch_all
self._result_cache = list(self.iterator())
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/db/models/query.py", line 52, in __iter__
results = compiler.execute_sql()
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 852, in execute_sql
cursor.execute(sql, params)
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/db/utils.py", line 95, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/var/www/website_mig/venv/local/lib/python2.7/site-packages/django/db/backends/sqlite3/base.py", line 323, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: no such table: numeric_howtoapply`
The problem is that your queryset is being evaluated when the urls.py loads. When you run makemigrations for a new project, this causes the error because the table has not been created yet.
You can fix this by subclassing ListView and moving the queryset into get_queryset.
class MyListView(ListView):
template_name = 'numeric/apply.html'
def get_queryset(self):
return list(chain(models.HowToApply.objects.filter(active=True).order_by('sequence_number'), models.AcademyAdmin.objects.all()))
Then change your url pattern to use your new view.
url(r'^academy/howtoapply/$',
MyListView.as_view(),
name='apply',
),
Django 1.9 runs some checks to validate your url patterns, which means that the url patterns are loaded before the makemigrations command runs. Django 1.8 does not have these checks, so you can get away with setting the queryset as you have done.
来源：https://stackoverflow.com/questions/37726396/upgrading-from-django-1-6-to-1-9-python-manage-py-migrate-failure