django-migrations

I would like to execute the following migration: # -*- coding: utf-8 -*- from __future__ import unicode_literals from django.contrib.auth.models import Permission from django.db import migrations from django.conf import settings from django.contrib.auth.models import Group, User def add_api_group(apps, schema_editor): Group.objects.create(name=settings.API_USER_GROUP) # get_or_create returns a tuple, not a Group group = Group.objects.get(name=settings.API_USER_GROUP) permissions = Permission.objects.filter(codename__in = [ 'add_topic', ]) group.permissions.add(*permissions) def add_api_user

I am creating some dynamic Django models in my application and everything seems to be working as expected except for the migration system. If I create a dynamic Django model and set managed = False, Django's makemigrations command still generates a migration for that new model. The migration looks something like this: class Migration(migrations.Migration): dependencies = [ ('atom', '0001_initial'), ] operations = [ migrations.CreateModel( name='books', fields=[ ], options={ 'db_table': 'books', 'managed': False, }, bases=(models.Model,), ), ] If I don't create the migration, when I run python

I have one model in my app running in a server with a few entries. I need to add a SlugField , unique and not-null for this model. The SlugField will be populated based on trading_name . I've changed my model in order to add this new field and modified save method: class Supplier(StatusModel): SLUG_MAX_LENGTH = 210 slug = models.SlugField(unique=True, max_length=SLUG_MAX_LENGTH) trading_name = models.CharField(max_length=200, verbose_name=_('trading name')) ... def save(self, *args, **kwargs): self.slug = orig = slugify(self.trading_name)[:Supplier.SLUG_MAX_LENGTH] for x in itertools.count(1):

I changed a field from CharField to ForeignKey on a Model called Availability, when I am trying to migrate I keep getting the error below: ValueError: Lookup failed for model referenced by field reservation.Availability.location: useraccount.Location Any idea why this could be happening? Thanks --------------UPDATED CODE-------------- App: reservation from useraccount.models import Location class Availability(models.Model): location = models.ForeignKey(Location) App: useraccount class Location(models.Model): town = models.CharField(max_length=100) county = models.CharField(max_length=100) def

My Django project is connect to the remote MySQL database. After I created all the model classes in Django, I tried python manage.py makemigrations Everything is fine. Then I entered python manage.py migrate Then an error occurred during "Running migrations:", "Applying event.0002_auto_20150904_2141..." Error code: django.db.utils.OperationalError: (2013, 'Lost connection to MySQL server during query') Does anyone know what might cause this error? I followed the exact procedures in the official Django tutorial. Please do this : 1- Install new fresh of mySQL server first. 2- Create new db 3-

I have a UserProfile model that refers to my User model with a OneToOneField . I also use the post_save signal to auto create the UserProfile when the user is created. This works great apart from when creating a user through the admin (where I use an inline) when I get an error about duplicate profile. This answer recommends setting the primary key to be the OneToOneField referring to user . So before: class UserProfile(models.Model): user = models.OneToOneField(settings.AUTH_USER_MODEL) # ... subjects = models.ManyToManyField(Subject, null=True, blank=True) After class UserProfile(models