我做了什么：-删除了完整的数据库。-删除了迁移文件夹的内容
然后我做了：python manage.py makemigrations。
我收到上述错误消息。
我也做了：-重新拉出github仓库-创建venv-激活静脉-运行python manage.py migration
看起来好像migration命令检查完整的源文件中是否存在对不存在的表的引用。我在这里没主意。
错误：
python manage.py makemigrations
Traceback (most recent call last):
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 86, in _execute
return self.cursor.execute(sql, params)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line 396, in execute
return Database.Cursor.execute(self, query, params)
sqlite3.OperationalError: no such table: newshows_setting
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 21, in <module>
main()
File "manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
utility.execute()
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/core/management/__init__.py", line 395, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/core/management/base.py", line 328, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/core/management/base.py", line 366, in execute
self.check()
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/core/management/base.py", line 395, in check
include_deployment_checks=include_deployment_checks,
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/core/management/base.py", line 382, in _run_checks
return checks.run_checks(**kwargs)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/core/checks/registry.py", line 72, in run_checks
new_errors = check(app_configs=app_configs)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/core/checks/urls.py", line 13, in check_url_config
return check_resolver(resolver)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/core/checks/urls.py", line 23, in check_resolver
return check_method()
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/urls/resolvers.py", line 407, in check
for pattern in self.url_patterns:
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/utils/functional.py", line 48, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/urls/resolvers.py", line 588, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/utils/functional.py", line 48, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/urls/resolvers.py", line 581, in urlconf_module
return import_module(self.urlconf_name)
File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/home/harald/Projects/newshows/src/new_shows/urls.py", line 7, in <module>
path('', include('newshows.urls')),
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/urls/conf.py", line 34, in include
urlconf_module = import_module(urlconf_module)
File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/home/harald/Projects/newshows/src/newshows/urls.py", line 2, in <module>
from . import views
File "/home/harald/Projects/newshows/src/newshows/views.py", line 7, in <module>
from .tables import ShowTable
File "/home/harald/Projects/newshows/src/newshows/tables.py", line 8, in <module>
class ShowTable(tables.Table):
File "/home/harald/Projects/newshows/src/newshows/tables.py", line 12, in ShowTable
class Meta:
File "/home/harald/Projects/newshows/src/newshows/tables.py", line 13, in Meta
settings = Setting.objects.get(id=1)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/models/query.py", line 411, in get
num = len(clone)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/models/query.py", line 258, in __len__
self._fetch_all()
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/models/query.py", line 1261, in _fetch_all
self._result_cache = list(self._iterable_class(self))
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/models/query.py", line 57, in __iter__
results = compiler.execute_sql(chunked_fetch=self.chunked_fetch, chunk_size=self.chunk_size)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1144, in execute_sql
cursor.execute(sql, params)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 100, in execute
return super().execute(sql, params)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 68, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 77, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 86, in _execute
return self.cursor.execute(sql, params)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 86, in _execute
return self.cursor.execute(sql, params)
File "/home/harald/Projects/newshows/.venv/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line 396, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: no such table: newshows_setting
问题已在您的堆栈跟踪中找到：
File "/home/harald/Projects/newshows/src/newshows/tables.py", line 13, in Meta
settings = Setting.objects.get(id=1)
这意味着您正在编译应用程序时在代码中的某个位置运行Setting.objects.get(id=1)。这将在makemigrations命令中进行实际迁移之前发生。重构代码以延迟执行该调用将解决您的问题。
问题是，我试图访问一个尚不存在的查询集。我重构了整个代码，以使用环境变量进行设置。