Hi,
I tried adding a foreign key to a model in a Django app I'm building to
learn 1.7. I am using Python 3.4 and Django 1.7c2
#blog/models.py
from django.contrib.auth.models import User
from django.db import models
class Comment(models.Model):
user = models.ForeignKey(User, blank=True, null=True)
created_at = models.DateTimeField(auto_now=True)
comment = models.CharField(max_length=255)
This is an already existing database I ran "manage.py makemigrations" and
"manage.py migrate". Make migration works fine but running migrate
generates this error (I am not using a custom user model). I don't
understand 'auth' not found as it is in my project settings and I am using
the admin panel:
(screens)*➜ **screens **git:(**master**) **✗* ./manage.py migrate
*Operations to perform:*
* Synchronize unmigrated apps: *django_extensions, crispy_forms
* Apply all migrations: *auth, admin, contenttypes, sessions, website
*Synchronizing apps without migrations:*
Creating tables...
Installing custom SQL...
Installing indexes...
*Running migrations:*
Applying website.0004_comment_created_by_user...Traceback (most recent
call last):
File
"/Users/scontapay/.pyenv/versions/screens/lib/python3.4/site-packages/django/apps/registry.py",
line 148, in get_app_config
return self.app_configs[app_label]
KeyError: 'auth'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File
"/Users/scontapay/.pyenv/versions/screens/lib/python3.4/site-packages/django/db/migrations/state.py",
line 79, in render
model = self.apps.get_model(lookup_model[0], lookup_model[1])
File
"/Users/scontapay/.pyenv/versions/screens/lib/python3.4/site-packages/django/apps/registry.py",
line 202, in get_model
return self.get_app_config(app_label).get_model(model_name.lower())
File
"/Users/scontapay/.pyenv/versions/screens/lib/python3.4/site-packages/django/apps/registry.py",
line 150, in get_app_config
raise LookupError("No installed app with label '%s'." % app_label)
LookupError: No installed app with label 'auth'.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "./manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File
"/Users/scontapay/.pyenv/versions/screens/lib/python3.4/site-packages/django/core/management/__init__.py",
line 385, in execute_from_command_line
utility.execute()
File
"/Users/scontapay/.pyenv/versions/screens/lib/python3.4/site-packages/django/core/management/__init__.py",
line 377, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File
"/Users/scontapay/.pyenv/versions/screens/lib/python3.4/site-packages/django/core/management/base.py",
line 288, in run_from_argv
self.execute(*args, **options.__dict__)
File
"/Users/scontapay/.pyenv/versions/screens/lib/python3.4/site-packages/django/core/management/base.py",
line 337, in execute
output = self.handle(*args, **options)
File
"/Users/scontapay/.pyenv/versions/screens/lib/python3.4/site-packages/django/core/management/commands/migrate.py",
line 160, in handle
executor.migrate(targets, plan, fake=options.get("fake", False))
File
"/Users/scontapay/.pyenv/versions/screens/lib/python3.4/site-packages/django/db/migrations/executor.py",
line 63, in migrate
self.apply_migration(migration, fake=fake)
File
"/Users/scontapay/.pyenv/versions/screens/lib/python3.4/site-packages/django/db/migrations/executor.py",
line 91, in apply_migration
if self.detect_soft_applied(migration):
File
"/Users/scontapay/.pyenv/versions/screens/lib/python3.4/site-packages/django/db/migrations/executor.py",
line 135, in detect_soft_applied
apps = project_state.render()
File
"/Users/scontapay/.pyenv/versions/screens/lib/python3.4/site-packages/django/db/migrations/state.py",
line 89, in render
model=lookup_model,
ValueError: Lookup failed for model referenced by field
website.Comment.created_by_user: auth.User
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