使用迁移创建新表时，错误表已存在

Question

When I create a new model inside models.py and run the following:

python manage.py makemigrations appname #worked
python manage.py migrate #doesnt worked

I get this error:

table "storage_OldModel" already exists

I also checked this question Django migrate : doesn't create tables but there wasn't anything to help me out.

This is the error trace:

Environment:


Request Method: GET
Request URL: http://127.0.0.1:9000/ad/storage/pcmodels/

Django Version: 2.1
Python Version: 3.7.0
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'customers.apps.CustomersConfig',
 'storage.apps.StorageConfig',
 'notes.apps.NotesConfig',
 'search.apps.SearchConfig',
 'crispy_forms',
 'widget_tweaks',
 'import_export',
 'formset_bootstrap']
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']



Traceback:

File "D:\coding\project\lib\site-packages\django\db\backends\utils.py" in _execute
  85.                 return self.cursor.execute(sql, params)

File "D:\coding\project\lib\site-packages\django\db\backends\sqlite3\base.py" in execute
  296.         return Database.Cursor.execute(self, query, params)

The above exception (no such table: storage_pcmodels) was the direct cause of the following exception:

File "D:\coding\project\lib\site-packages\django\core\handlers\exception.py" in inner
  34.             response = get_response(request)

File "D:\coding\project\lib\site-packages\django\core\handlers\base.py" in _get_response
  126.                 response = self.process_exception_by_middleware(e, request)

File "D:\coding\project\lib\site-packages\django\core\handlers\base.py" in _get_response
  124.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "D:\coding\project\lib\site-packages\django\contrib\admin\options.py" in wrapper
  607.                 return self.admin_site.admin_view(view)(*args, **kwargs)

File "D:\coding\project\lib\site-packages\django\utils\decorators.py" in _wrapped_view
  142.                     response = view_func(request, *args, **kwargs)

File "D:\coding\project\lib\site-packages\django\views\decorators\cache.py" in _wrapped_view_func
  44.         response = view_func(request, *args, **kwargs)

File "D:\coding\project\lib\site-packages\django\contrib\admin\sites.py" in inner
  223.             return view(request, *args, **kwargs)

File "D:\coding\project\lib\site-packages\django\utils\decorators.py" in _wrapper
  45.         return bound_method(*args, **kwargs)

File "D:\coding\project\lib\site-packages\django\utils\decorators.py" in _wrapped_view
  142.                     response = view_func(request, *args, **kwargs)

File "D:\coding\project\lib\site-packages\django\contrib\admin\options.py" in changelist_view
  1685.             cl = self.get_changelist_instance(request)

File "D:\coding\project\lib\site-packages\django\contrib\admin\options.py" in get_changelist_instance
  745.             sortable_by,

File "D:\coding\project\lib\site-packages\django\contrib\admin\views\main.py" in __init__
  81.         self.get_results(request)

File "D:\coding\project\lib\site-packages\django\contrib\admin\views\main.py" in get_results
  209.         result_count = paginator.count

File "D:\coding\project\lib\site-packages\django\utils\functional.py" in __get__
  37.         res = instance.__dict__[self.name] = self.func(instance)

File "D:\coding\project\lib\site-packages\django\core\paginator.py" in count
  87.             return self.object_list.count()

File "D:\coding\project\lib\site-packages\django\db\models\query.py" in count
  383.         return self.query.get_count(using=self.db)

File "D:\coding\project\lib\site-packages\django\db\models\sql\query.py" in get_count
  498.         number = obj.get_aggregation(using, ['__count'])['__count']

File "D:\coding\project\lib\site-packages\django\db\models\sql\query.py" in get_aggregation
  483.         result = compiler.execute_sql(SINGLE)

File "D:\coding\project\lib\site-packages\django\db\models\sql\compiler.py" in execute_sql
  1061.             cursor.execute(sql, params)

File "D:\coding\project\lib\site-packages\django\db\backends\utils.py" in execute
  100.             return super().execute(sql, params)

File "D:\coding\project\lib\site-packages\django\db\backends\utils.py" in execute
  68.         return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)

File "D:\coding\project\lib\site-packages\django\db\backends\utils.py" in _execute_with_wrappers
  77.         return executor(sql, params, many, context)

File "D:\coding\project\lib\site-packages\django\db\backends\utils.py" in _execute
  85.                 return self.cursor.execute(sql, params)

File "D:\coding\project\lib\site-packages\django\db\utils.py" in __exit__
  89.                 raise dj_exc_value.with_traceback(traceback) from exc_value

File "D:\coding\project\lib\site-packages\django\db\backends\utils.py" in _execute
  85.                 return self.cursor.execute(sql, params)

File "D:\coding\project\lib\site-packages\django\db\backends\sqlite3\base.py" in execute
  296.         return Database.Cursor.execute(self, query, params)

Exception Type: OperationalError at /ad/storage/pcmodels/
Exception Value: no such table: storage_pcmodels

If someone knows a solution please let me know.

Answer 1

as i used django 2.2 version the solution is

python manage.py makemigration app_name

python manage.py migrate --fake-initial 
python manage.py migrate app_name

hope it will help you