How to get rid of the "relation does not exist" error?

Question

MySQL

I've been struggling with this issue for 3 days. Heroku has a MySQL database. I also created a django application that connects to this database. If I run it on my computer, then everything works for me. However, if I run the app on heroku, I get an error:

relation "station" does not exist
LINE 1: ...ongitude", "station"."Type", "station"."Link" FROM "station"

Feeling as if the application does not see the database tables at all. How to fix this problem?
Here is the full traceback:

File "/app/.heroku/python/lib/python3.7/site-packages/django/db/backends/utils.py" in _execute
85. return self.cursor.execute(sql, params)
The above exception (relation "station" does not exist
LINE 1: ...ongitude", "station"."Type", "station"."Link" FROM "station"
^
) was the direct cause of the following exception:
File "/app/ .heroku/python/lib/python3.7/site-packages/django/core/handlers/exception.py" in inner
35. response = get_response(request)
File "/app/.heroku/python/lib/python3.7 /site-packages/django/core/handlers/base.py"in _get_response
128. response = self.process_exception_by_middleware(e, request)
File "/app/.heroku/python/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response
126. response = wrapped_callback( request, *callback_args, **callback_kwargs)
File "/app/.heroku/python/lib/python3.7/site-packages/django/views/generic/base.py" in view
69. return self.dispatch(request, *args, **kwargs)
File "/app/.heroku/python/lib/python3.7/site-packages/django/views/generic/base.py" in dispatch
89. return handler(request, *args, * *kwargs)
File "/app/task1/views.py" in get
45. for station in stations:
File "/app/.heroku/python/lib/python3.7/site-packages/django/db/models/query.py" in __iter__
272. self._fetch_all()
File "/app/.heroku/python/lib /python3.7/site-packages/django/db/models/query.py" in _fetch_all
1179. self._result_cache = list(self._iterable_class(self))
File "/app/.heroku/python/lib/python3. 7/site-packages/django/db/models/query.py" in __iter__
54. results = compiler.execute_sql(chunked_fetch=self.chunked_fetch, chunk_size=self.chunk_size)
File "/app/.heroku/python/lib/ python3.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
1063. cursor.execute(sql, params)
File "/app/.heroku/python/lib/python3.7/site-packages/django/db/backends/utils.py" in execute
100. return super().execute(sql, params)
File "/app/ .heroku/python/lib/python3.7/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/python3.7/site-packages/django/db/backends/utils.py" in _execute_with_wrappers
77. return executor(sql, params, many, context)
File "/app/.heroku /python/lib/python3.7/site-packages/django/db/backends/utils.py" in _execute
85. return self.cursor.execute(sql, params)
File "/app/.heroku/python/lib/python3.7/site-packages/django/db/utils.py" in __exit__
89. raise dj_exc_value.with_traceback(traceback) from exc_value
File "/app/.heroku/python /lib/python3.7/site-packages/django/db/backends/utils.py" in _execute
85. return self.cursor.execute(sql, params)
Exception Type: ProgrammingError at /map/
Exception Value: relation "station " does not exist
LINE 1: ...ongitude", "station"."Type", "station"."Link" FROM "station"

^
settings.py

import os
    
    # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
    BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
    
    # Quick-start development settings - unsuitable for production
    # See https://docs.djangoproject.com/en/2.1/howto/deployment/checklist/
    
    # SECURITY WARNING: keep the secret key used in production secret!
    SECRET_KEY = '#o032sw#v+_uj&f+a*&n*[email protected]%^lub4t=itn%fdaxpni'
    
    # SECURITY WARNING: don't run with debug turned on in production!
    DEBUG = True
    
    ALLOWED_HOSTS = ['*']
    
    # Application definition
    
    INSTALLED_APPS = [
        'django.contrib.admin',
        'django.contrib.auth',
        'django.contrib.contenttypes',
        'django.contrib.sessions',
        'django.contrib.messages',
        'django.contrib.staticfiles',
        'task1',
    ]
    
    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',
    ]
    
    ROOT_URLCONF = 'geomagnet.urls'
    
    TEMPLATES = [
        {
            'BACKEND': 'django.template.backends.django.DjangoTemplates',
            'DIRS': [],
            'APP_DIRS': True,
            'OPTIONS': {
                'context_processors': [
                    'django.template.context_processors.debug',
                    'django.template.context_processors.request',
                    'django.contrib.auth.context_processors.auth',
                    'django.contrib.messages.context_processors.messages',
                ],
            },
        },
    ]
    
    WSGI_APPLICATION = 'geomagnet.wsgi.application'
    
    # Database
    # https://docs.djangoproject.com/en/2.1/ref/settings/#databases
    
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.mysql',
            'NAME': 'heroku_8165878e13ba965',
            'USER': 'be45b00e00ae8e',
            'PASSWORD': 'password',
            'HOST': 'eu-cdbr-west-02.cleardb.net',
            'PORT': '3306',
        }
    }
    
    # Password validation
    # https://docs.djangoproject.com/en/2.1/ref/settings/#auth-password-validators
    
    AUTH_PASSWORD_VALIDATORS = [
        {
            'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
        },
        {
            'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
        },
        {
            'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
        },
        {
            'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
        },
    ]
    
    # Internationalization
    # https://docs.djangoproject.com/en/2.1/topics/i18n/
    
    LANGUAGE_CODE = 'ru-RU'
    
    TIME_ZONE = 'UTC'
    
    USE_I18N = True
    
    USE_L10N = True
    
    USE_TZ = True
    
    # Static files (CSS, JavaScript, Images)
    # https://docs.djangoproject.com/en/2.1/howto/static-files/
    
    STATIC_URL = '/static/'
    STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles')
    
    import dj_database_url
    
    db_from_env = dj_database_url.config()
    DATABASES['default'].update(db_from_env)

views.py:

from django.shortcuts import render
    from django.views.generic import TemplateView
    from .models import Station, Net, Networkstations
    from django.http import HttpResponse
    from django.core.serializers.json import DjangoJSONEncoder
    import json
    class List(TemplateView):
        template_name = 'station_list.html'
    
        def get(self, request):
            stations = Station.objects.all()
            list_name_net = []
            stations_out = []
    
            for station in stations:
                list_name_net.append(
                    list(Networkstations.objects.filter(idstation=station.id).values_list('idnet__name', flat=True)))
    
            for station in stations:
                stations_out.append(
                    {'sitecode': station.sitecode, 'name': station.name, 'latitude': station.latitude,
                     'longitude': station.longitude, 'type': station.type, 'link': station.link, })
            ctx = {
                'stations': json.dumps(stations_out, cls=DjangoJSONEncoder),
                'list_name_net': json.dumps(list_name_net, cls=DjangoJSONEncoder),
            }
            return render(request, self.template_name, ctx)

procfile:
web: gunicorn geomagnet.wsgi --log-file -
.gitignore:

__pycache__/
    *.pyc

requests.txt:

dj-database-url==0.5.0
    Django==2.0
    gunicorn==19.9.0
    mysqlclient==1.3.13
    pytz==2019.1
    whitenoise==3.3.1
    psycopg2==2.7.3.1

.