djangoのviewを使った画面の表示エラーについて
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Exception in thread django-main-thread:
Traceback (most recent call last):
File "/Users/ken/.pyenv/versions/3.11.3/lib/python3.11/site-packages/django/urls/resolvers.py", line 717, in url_patterns
iter(patterns)
TypeError: 'module' object is not iterable
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/Users/ken/.pyenv/versions/3.11.3/lib/python3.11/threading.py", line 1038, in _bootstrap_inner
self.run()
File "/Users/ken/.pyenv/versions/3.11.3/lib/python3.11/threading.py", line 975, in run
self._target(*self._args, **self._kwargs)
File "/Users/ken/.pyenv/versions/3.11.3/lib/python3.11/site-packages/django/utils/autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "/Users/ken/.pyenv/versions/3.11.3/lib/python3.11/site-packages/django/core/management/commands/runserver.py", line 133, in inner_run
self.check(display_num_errors=True)
File "/Users/ken/.pyenv/versions/3.11.3/lib/python3.11/site-packages/django/core/management/base.py", line 485, in check
all_issues = checks.run_checks(
^^^^^^^^^^^^^^^^^^
File "/Users/ken/.pyenv/versions/3.11.3/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/ken/.pyenv/versions/3.11.3/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/ken/.pyenv/versions/3.11.3/lib/python3.11/site-packages/django/core/checks/urls.py", line 72, in _load_all_namespaces
namespaces.extend(_load_all_namespaces(pattern, current))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/ken/.pyenv/versions/3.11.3/lib/python3.11/site-packages/django/core/checks/urls.py", line 61, in _load_all_namespaces
url_patterns = getattr(resolver, "url_patterns", [])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/ken/.pyenv/versions/3.11.3/lib/python3.11/site-packages/django/utils/functional.py", line 57, in __get__
res = instance.__dict__[self.name] = self.func(instance)
^^^^^^^^^^^^^^^^^^^
File "/Users/ken/.pyenv/versions/3.11.3/lib/python3.11/site-packages/django/urls/resolvers.py", line 725, in url_patterns
raise ImproperlyConfigured(msg.format(name=self.urlconf_name)) from e
django.core.exceptions.ImproperlyConfigured: The included URLconf '<module 'first_app.urls' from '/Users/ken/python/first_project/first_app/urls.py'>' does not appear to have any patterns in it. If you see the 'urlpatterns' variable with valid patterns in the file then the issue is probably caused by a circular import.
urls.py(first_app)
from django.urls import path
from . import views
app_name = 'first_app'
urlpatterns = [
path('hello', views.index, name='index'),
]
view.py(first_app)
def greet
puts Hello World
end
setting.py(first_project)
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'first_app',
]
urls.py(first_project)
from django.contrib import admin
from django.urls import path, include
urlpatterns = [
path('admin/', admin.site.urls),
path('first_app/', include('first_app.urls')),
]
一度削除し、再度作成
各記述の間違いの確認
不要な項目のコメントアウト
同種事例について調べたところ、ほとんどが記述ミスでした。
エラー文の最後が、
' does not appear to have any patterns in it. If you see the 'urlpatterns' variable with valid patterns in the file then the issue is probably caused by a circular import.
となっているので、urls.pyで使用している'first_app.urls'がない、といった内容と思われるので、呼び出した時の記述がどこかおかしいと思っているのですが、解決に至りませんでした。
from . import views
urlpatterns = [
path('hello', views.index, name='index'),
]
urls.pyの上記箇所から、view.py内はindexという関数を持っていることになっています。
ですが、記載のview.pyにはgreet関数のみが存在し、しかもpythonの構文と異なります。
下記のようにview.pyを編集してみると如何でしょうか。
from django.http import HttpResponse
def index(request):
return HttpResponse("Hello, world.")
@kenken0413
Questionerありがとうございます、解決いたしました！