Error persisting ProgrammingError column does not exist

Question

Models.py for 'Accomm':

class Accomm(models.Model):
    mapped_location=models.ForeignKey(Location,related_name='l_accomms',null=True,blank=True,on_delete=models.SET_NULL)
    description=models.CharField(max_length=1000,null=True,blank=True)
    creator=models.OneToOneField(accountmodels.UserProfileModel,related_name='u_creator',null=True,on_delete=models.SET_NULL,blank=True)
    slug_key=models.SlugField(unique=True)
    is_active=models.BooleanField(default=False)

Views.py:

def home(request):
    user = request.user
    accomm = Accomm.objects.annotate(img_count=models.Count('a_image')).filter(img_count__gte=1)[:6]
    return render(request, 'home.html', {'accomm':accomm})

Any other ideas besides the solutions proposed here?

Comments

Full error:

Django Version: 1.11.7
Python Version: 2.7.10
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.gis',
 'django.contrib.humanize',
 'django.contrib.messages',
 'django.contrib.sessions',
 'django.contrib.staticfiles',
 'rest_framework',
 'accounts',
 'maps',
 'objects',
 'social_django']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'social_django.middleware.SocialAuthExceptionMiddleware']

Traceback:

    File "/Library/Python/2.7/site-packages/django/core/handlers/exception.py" in inner
      41.             response = get_response(request)

    File "/Library/Python/2.7/site-packages/django/core/handlers/base.py" in _get_response
      187.                 response = self.process_exception_by_middleware(e, request)

    File "/Library/Python/2.7/site-packages/django/core/handlers/base.py" in _get_response
      185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

    File "/Users/jayt/project/main/views.py" in home
      21.     return render(request, 'home.html', {'accomm':accomm})

    File "/Library/Python/2.7/site-packages/django/shortcuts.py" in render
      30.     content = loader.render_to_string(template_name, context, request, using=using)

    File "/Library/Python/2.7/site-packages/django/template/loader.py" in render_to_string
      68.     return template.render(context, request)

    File "/Library/Python/2.7/site-packages/django/template/backends/django.py" in render
      66.             return self.template.render(context)

    File "/Library/Python/2.7/site-packages/django/template/base.py" in render
      207.                     return self._render(context)

    File "/Library/Python/2.7/site-packages/django/template/base.py" in _render
      199.         return self.nodelist.render(context)

    File "/Library/Python/2.7/site-packages/django/template/base.py" in render
      990.                 bit = node.render_annotated(context)

    File "/Library/Python/2.7/site-packages/django/template/base.py" in render_annotated
      957.             return self.render(context)

    File "/Library/Python/2.7/site-packages/django/template/loader_tags.py" in render
      177.             return compiled_parent._render(context)

    File "/Library/Python/2.7/site-packages/django/template/base.py" in _render
      199.         return self.nodelist.render(context)

    File "/Library/Python/2.7/site-packages/django/template/base.py" in render
      990.                 bit = node.render_annotated(context)

    File "/Library/Python/2.7/site-packages/django/template/base.py" in render_annotated
      957.             return self.render(context)

    File "/Library/Python/2.7/site-packages/django/template/loader_tags.py" in render
      72.                 result = block.nodelist.render(context)

    File "/Library/Python/2.7/site-packages/django/template/base.py" in render
      990.                 bit = node.render_annotated(context)

    File "/Library/Python/2.7/site-packages/django/template/base.py" in render_annotated
      957.             return self.render(context)

    File "/Library/Python/2.7/site-packages/django/template/defaulttags.py" in render
      321.             if match:

    File "/Library/Python/2.7/site-packages/django/db/models/query.py" in __nonzero__
      258.         return type(self).__bool__(self)

    File "/Library/Python/2.7/site-packages/django/db/models/query.py" in __bool__
      254.         self._fetch_all()

    File "/Library/Python/2.7/site-packages/django/db/models/query.py" in _fetch_all
      1118.             self._result_cache = list(self._iterable_class(self))

    File "/Library/Python/2.7/site-packages/django/db/models/query.py" in __iter__
      53.         results = compiler.execute_sql(chunked_fetch=self.chunked_fetch)

    File "/Library/Python/2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
      894.             raise original_exception

    Exception Type: ProgrammingError at /
    Exception Value: column objects_accomm.description does not exist
    LINE 1: ...omm"."id", "objects_accomm"."mapped_location_id", "objects_a...
                                                             ^

Answer 1

Something I like to try when my migrations get wonky is a something like:

python manage.py makemigrations
python manage.py migrate --fake

So this will make it seem like you model has the added column, so from here I then cut and paste the model into a temporary file, save the models and run the migrations regularly which will remove all of the model. Then you paste the model back into models.py and run migrations one more time. This seems to work for me, there are probably better ways to manage this however I am relatively new to django as I am just completing my first big project in it. Really hope this helps, if not let me know and I may have something else for you!

Comments

so after the fake migration, I ran a real migration.

very helpful! Thankssss!

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thanks a lot buddy

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Thank you very much, I struggled with this error the hole day and could just solve it.

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it is not working ..