所以我有一个与 MySQL 数据库一起使用的 django 项目。现在我正在按照 MDN 教程尝试将其部署在 Railway 上。我已将数据库从 MySQL 更改为 SQLite3。现在，当我尝试在本地计算机上运行它时，我收到此错误：
(venv) ~/Documents/FDM/Readinghood POD Project/readinghood $ python3 manage.py makemigrations readinghoodWARNING:root:No DATABASE_URL environment variable set, and so no databases setup
/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/airflow/configuration.py:241: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
if StrictVersion(sqlite3.sqlite_version) < StrictVersion(min_sqlite_version):
Traceback (most recent call last):
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/backends/utils.py", line 89, in _execute
return self.cursor.execute(sql, params)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/backends/sqlite3/base.py", line 328, in execute
return super().execute(query, params)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
sqlite3.OperationalError: no such table: book
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/manage.py", line 22, in <module>
main()
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/core/management/__init__.py", line 442, in execute_from_command_line
utility.execute()
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/core/management/__init__.py", line 436, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/core/management/base.py", line 412, in run_from_argv
self.execute(*args, **cmd_options)
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/core/management/base.py", line 453, in execute
self.check()
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/core/management/base.py", line 485, in check
all_issues = checks.run_checks(
^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/core/checks/registry.py", line 88, in run_checks
new_errors = check(app_configs=app_configs, databases=databases)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/core/checks/urls.py", line 42, in check_url_namespaces_unique
all_namespaces = _load_all_namespaces(resolver)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/core/checks/urls.py", line 61, in _load_all_namespaces
url_patterns = getattr(resolver, "url_patterns", [])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/utils/functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/urls/resolvers.py", line 715, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/utils/functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/urls/resolvers.py", line 708, in urlconf_module
return import_module(self.urlconf_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 940, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/readinghood/urls.py", line 9, in <module>
path('', include('readinghoodapp.urls')),
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/urls/conf.py", line 38, in include
urlconf_module = import_module(urlconf_module)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 940, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/readinghoodapp/urls.py", line 2, in <module>
from . import views
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/readinghoodapp/views.py", line 3, in <module>
from .forms import SignUpForm, CheckoutForm, PaymentForm, post_form_factory, EditProfileForm, ProfilePicForm, BookFilterForm
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/readinghoodapp/forms.py", line 6, in <module>
class BookFilterForm(forms.Form):
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/readinghoodapp/forms.py", line 7, in BookFilterForm
category = forms.MultipleChoiceField(choices=[(category, category) for category in Book.objects.values_list(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/models/query.py", line 398, in __iter__
self._fetch_all()
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/models/query.py", line 1881, in _fetch_all
self._result_cache = list(self._iterable_class(self))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/models/query.py", line 285, in __iter__
for row in compiler.results_iter(
^^^^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/models/sql/compiler.py", line 1513, in results_iter
results = self.execute_sql(
^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/models/sql/compiler.py", line 1562, in execute_sql
cursor.execute(sql, params)
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/backends/utils.py", line 102, in execute
return super().execute(sql, params)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/backends/utils.py", line 67, in execute
return self._execute_with_wrappers(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/backends/utils.py", line 80, in _execute_with_wrappers
return executor(sql, params, many, context)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/backends/utils.py", line 84, in _execute
with self.db.wrap_database_errors:
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/utils.py", line 91, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/backends/utils.py", line 89, in _execute
return self.cursor.execute(sql, params)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/lionel/Documents/FDM/Readinghood POD Project/readinghood/venv/lib/python3.11/site-packages/django/db/backends/sqlite3/base.py", line 328, in execute
return super().execute(query, params)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
django.db.utils.OperationalError: no such table: book
我已经尝试了一切：
更改设置文件中的数据库代码：
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'readinghood',
'USER': 'root',
'PASSWORD': ...,
'HOST': 'localhost',
'PORT': '3306',
}
}
至：
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': BASE_DIR / 'db.sqlite3',
}
}
首先你可以尝试使用 python manage.py migrate ，这个命令在你的新数据库中创建所有表