Relation does not exist – Django & Postgres

Question

I added some table to an existant model, but I got an error when i push my project to heroku :

This happens to any models I add on this particular app

ProgrammingError at /admin/dashboard/adressbook/
relation “dashboard_adressbook” does not exist
LINE 1: SELECT COUNT(*) AS “__count” FROM “dashboard_adressbook”

My models.py

class AdressBook(models.Model):
    author = models.ForeignKey(User, on_delete=models.CASCADE, verbose_name="Nom de l'utilisateur")
    text = models.CharField(max_length=200,verbose_name="Description")
    number = models.CharField(max_length=20,verbose_name="Numéro de téléphone")


    def __str__(self):
        return self.text

    def get_absolute_url(self):
        return reverse('dashboard-home')  

class Dashboard(models.Model):
    author = models.ForeignKey(User, on_delete=models.CASCADE, verbose_name="Nom de l'utilisateur")
    content = RichTextField(max_length=500,verbose_name="Description")
    text = models.TextField(verbose_name="Description supplémentaire",null=True, blank=True)
    date_posted = models.DateTimeField(default=timezone.now)

    def __str__(self):
        return self.content

    def get_absolute_url(self):
        return reverse('dashboard-home')

class Links(models.Model):
    author = models.ForeignKey(User, on_delete=models.CASCADE,verbose_name="Nom de l'utilisateur")
    content = models.URLField(max_length=500, verbose_name="URL")
    name = models.CharField(max_length=500, verbose_name="Description")

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('dashboard-home') 

class Todo(models.Model):
    author = models.ForeignKey(User, on_delete=models.CASCADE,verbose_name="Nom de l'utilisateur")
    text = models.CharField(max_length=150, verbose_name="Nom de la Todo")
    content = RichTextField(verbose_name="Description supplémentaire",null=True, blank=True)
    date_posted = models.DateTimeField(default=timezone.now)
    complete = models.BooleanField(default=False, verbose_name="Statut de la Todo")
    urgence = models.BooleanField(default=False,verbose_name="Tâche urgente")

    def __str__(self):
        return self.text

    def get_absolute_url(self):
        return reverse('dashboard-home') 

class Phone(models.Model):
    author = models.ForeignKey(User, on_delete=models.CASCADE, verbose_name="Nom de l'utilisateur")
    text = models.CharField(max_length=200,verbose_name="Description")
    number = models.CharField(max_length=20,verbose_name="Numéro de téléphone")


    def __str__(self):
        return self.text

    def get_absolute_url(self):
        return reverse('dashboard-home')

Traceback :

   Django Version: 2.1.7
Python Version: 3.6.7
Installed Applications:
['blog.apps.BlogConfig',
 'dashboard.apps.DashboardConfig',
 'property.apps.PropertyConfig',
 'users.apps.UsersConfig',
 'crispy_forms',
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'storages',
 'cloudinary',
 'ckeditor']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'whitenoise.middleware.WhiteNoiseMiddleware',
 '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']



Traceback:

File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/utils.py" in _execute
  85.                 return self.cursor.execute(sql, params)

The above exception (relation "dashboard_adressbook" does not exist
LINE 1: SELECT COUNT(*) AS "__count" FROM "dashboard_adressbook"
                                          ^
) was the direct cause of the following exception:

File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
  34.             response = get_response(request)

File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  126.                 response = self.process_exception_by_middleware(e, request)

File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  124.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/app/.heroku/python/lib/python3.6/site-packages/django/contrib/admin/options.py" in wrapper
  604.                 return self.admin_site.admin_view(view)(*args, **kwargs)

File "/app/.heroku/python/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapped_view
  142.                     response = view_func(request, *args, **kwargs)

File "/app/.heroku/python/lib/python3.6/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
  44.         response = view_func(request, *args, **kwargs)

File "/app/.heroku/python/lib/python3.6/site-packages/django/contrib/admin/sites.py" in inner
  223.             return view(request, *args, **kwargs)

File "/app/.heroku/python/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapper
  45.         return bound_method(*args, **kwargs)

File "/app/.heroku/python/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapped_view
  142.                     response = view_func(request, *args, **kwargs)

File "/app/.heroku/python/lib/python3.6/site-packages/django/contrib/admin/options.py" in changelist_view
  1675.             cl = self.get_changelist_instance(request)

File "/app/.heroku/python/lib/python3.6/site-packages/django/contrib/admin/options.py" in get_changelist_instance
  742.             sortable_by,

File "/app/.heroku/python/lib/python3.6/site-packages/django/contrib/admin/views/main.py" in __init__
  81.         self.get_results(request)

File "/app/.heroku/python/lib/python3.6/site-packages/django/contrib/admin/views/main.py" in get_results
  209.         result_count = paginator.count

File "/app/.heroku/python/lib/python3.6/site-packages/django/utils/functional.py" in __get__
  37.         res = instance.__dict__[self.name] = self.func(instance)

File "/app/.heroku/python/lib/python3.6/site-packages/django/core/paginator.py" in count
  87.             return self.object_list.count()

File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/query.py" in count
  383.         return self.query.get_count(using=self.db)

File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/sql/query.py" in get_count
  498.         number = obj.get_aggregation(using, ['__count'])['__count']

File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/sql/query.py" in get_aggregation
  483.         result = compiler.execute_sql(SINGLE)

File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/sql/compiler.py" in execute_sql
  1065.             cursor.execute(sql, params)

File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/utils.py" in execute
  100.             return super().execute(sql, params)

File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/utils.py" in execute
  68.         return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)

File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/utils.py" in _execute_with_wrappers
  77.         return executor(sql, params, many, context)

File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/utils.py" in _execute
  85.                 return self.cursor.execute(sql, params)

File "/app/.heroku/python/lib/python3.6/site-packages/django/db/utils.py" in __exit__
  89.                 raise dj_exc_value.with_traceback(traceback) from exc_value

File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/utils.py" in _execute
  85.                 return self.cursor.execute(sql, params)

Exception Type: ProgrammingError at /admin/dashboard/adressbook/
Exception Value: relation "dashboard_adressbook" does not exist
LINE 1: SELECT COUNT(*) AS "__count" FROM "dashboard_adressbook"
                                          ^

I did all of my migrations on my local machine but stil the problem does not go away.

I did my migrations on Heroku as well.

Thanks

Asked By: user11005819

||

Source

Answer 1

Warning : Please do not make the same mistake, do not use a different engine on on your local machine and on production, once you encounter a problem, it is impossible to fix it

So after 4 days I solved this problem by deleting the data from my Database.

I started clean and I made sure to migrate before the push to heroku, I have also been using the same engine (postgres) on my local machine and Heroku and I haven’t encounter any bug so far.

So to solve this problem you have to start clean, the only solution is to delete the database, which is not convenient if you have valuable data.

Answered By: user11005819

Answer 2

This worked for me

heroku run bash
python manage.py makemigrations
python manage.py migrate

Answered By: eaithy

Answer 3

I got the same error when landing on a template getting data from my database, after having resetted my database from Heroku dashboard.

I solved it by doing:

python manage.py makemigrations
python manage.py migrate
git add .
git push -m “upload empty database”
git push heroku master

Answered By: Tms91

Answer 4

I was facing the same issue for one of the migration file I was generating for model. After spending couple of hours, I came to resolve it by deleting those migration files from django_migrations table.

python manage.py dbshell
select * from django_migrations;

You will see list of all migrations your app wise, delete all those throwing error.

delete from django_migrations where id>=xx
q
python manage.py migrate

Answered By: Hardik Patil

Relation does not exist – Django & Postgres

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