django make migrations error. – table doesn’t exist

django app 에서 makemigrations 했을때, 테이블이 없다는 오류메시지가 나올때 처리방법.

(venv) D:\Python_Project\ipchaser\ipchaser>manage.py makemigrations chaser
Traceback (most recent call last):
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\backends\utils.py", line 86, in _execute
    return self.cursor.execute(sql, params)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\backends\mysql\base.py", line 74, in execute
    return self.cursor.execute(query, args)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\MySQLdb\cursors.py", line 209, in execute
    res = self._query(query)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\MySQLdb\cursors.py", line 315, in _query
    db.query(q)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\MySQLdb\connections.py", line 239, in query
    _mysql.connection.query(self, query)
MySQLdb._exceptions.ProgrammingError: (1146, "Table 'ipchaser.tools_macvendors' doesn't exist")

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "D:\Python_Project\ipchaser\ipchaser\manage.py", line 21, in <module>
    main()
  File "D:\Python_Project\ipchaser\ipchaser\manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\core\management\__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\core\management\base.py", line 328, in run_from_argv
    self.execute(*args, **cmd_options)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\core\management\base.py", line 366, in execute
    self.check()
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\core\management\base.py", line 395, in check
    include_deployment_checks=include_deployment_checks,
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\core\management\base.py", line 382, in _run_checks
    return checks.run_checks(**kwargs)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\core\checks\registry.py", line 72, in run_checks
    new_errors = check(app_configs=app_configs)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\core\checks\urls.py", line 13, in check_url_config
    return check_resolver(resolver)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\core\checks\urls.py", line 23, in check_resolver
    return check_method()
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\urls\resolvers.py", line 407, in check
    for pattern in self.url_patterns:
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\urls\resolvers.py", line 588, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\urls\resolvers.py", line 581, in urlconf_module
    return import_module(self.urlconf_name)
  File "C:\Users\Works\AppData\Local\Programs\Python\Python37\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "D:\Python_Project\ipchaser\ipchaser\ipchaser\urls.py", line 20, in <module>
    path('tools/', include('tools.urls')),
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\urls\conf.py", line 34, in include
    urlconf_module = import_module(urlconf_module)
  File "C:\Users\Works\AppData\Local\Programs\Python\Python37\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "D:\Python_Project\ipchaser\ipchaser\tools\urls.py", line 2, in <module>
    from .views import DiffView, MacVenrorsView, WhoisSearch, DNSLookup
  File "D:\Python_Project\ipchaser\ipchaser\tools\views.py", line 23, in <module>
    class MacVenrorsView(View):
  File "D:\Python_Project\ipchaser\ipchaser\tools\views.py", line 26, in MacVenrorsView
    total = MacVendors.objects.count()
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\models\manager.py", line 82, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\models\query.py", line 397, in count
    return self.query.get_count(using=self.db)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\models\sql\query.py", line 517, in get_count
    number = obj.get_aggregation(using, ['__count'])['__count']
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\models\sql\query.py", line 502, in get_aggregation
    result = compiler.execute_sql(SINGLE)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\models\sql\compiler.py", line 1144, in execute_sql
    cursor.execute(sql, params)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\backends\utils.py", line 100, in execute
    return super().execute(sql, params)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\backends\utils.py", line 68, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\backends\utils.py", line 77, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\backends\utils.py", line 86, in _execute
    return self.cursor.execute(sql, params)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\utils.py", line 90, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\backends\utils.py", line 86, in _execute
    return self.cursor.execute(sql, params)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\django\db\backends\mysql\base.py", line 74, in execute
    return self.cursor.execute(query, args)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\MySQLdb\cursors.py", line 209, in execute
    res = self._query(query)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\MySQLdb\cursors.py", line 315, in _query
    db.query(q)
  File "D:\Python_Project\ipchaser\venv\lib\site-packages\MySQLdb\connections.py", line 239, in query
    _mysql.connection.query(self, query)
django.db.utils.ProgrammingError: (1146, "Table 'ipchaser.tools_macvendors' doesn't exist")

당연히 테이블이 없는데, 테이블이 없다고 오류가 발생함.

project/urls.py 에, app 만들었을때 추가한 url을 주석처리하고 makemigrations 실행.

urlpatterns = [
    # path('tools/', include('tools.urls')),
    # path('devmgr/', include('devmgr.urls')),
    # path('', include('chaser.urls')),
    # path('utils/', include('utils.urls')),
    path('admin/', admin.site.urls),
    path('accounts/', include('django.contrib.auth.urls')),
]

(venv) D:\Python_Project\ipchaser\ipchaser>manage.py makemigrations chaser
Migrations for 'chaser':
  chaser\migrations\0001_initial.py
    - Create model Category
    - Create model DevInfo
    - Create model DropInfo
    - Create model History
    - Create model Memo
    - Create model SectorDesc
    - Create model Statistics
    - Create model MacIPinfo
    - Create model MacInfo
    - Create model ArpInfo

잘 만들어진다.