python - Django新手错误: - TypeError: view must be a callable or a list/tuple in the case of include()

Question

我是 python Django 的新手，想知道为什么没有创建 View 。这是我的 urls.py，位于 myproject 下。

from django.contrib import admin

from django.urls import path,include
from django.conf.urls import url
admin.autodiscover()

urlpatterns = ['',
    path('admin/', admin.site.urls),
    url('myapp/', include('myapp.url'))
]

这是我的 view.py，位于 myapp 文件夹中

from django.shortcuts import render

# Create your views here.
def hello(request):
    return render(request,"myapp/templates/hello.html", {})

这是 myapp 文件夹中的 url.py

from django.conf.urls import include, url

urlpatterns = ['', url('hello/', 'views.hello', name='hello'),]

这是完整的回溯

Traceback (most recent call last):
  File "/usr/lib/python3.7/threading.py", line 926, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.7/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/utils/autoreload.py", line 53, in wrapper
    fn(*args, **kwargs)
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 117, in inner_run
    self.check(display_num_errors=True)
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/core/management/base.py", line 395, in check
    include_deployment_checks=include_deployment_checks,
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/core/management/base.py", line 382, in _run_checks
    return checks.run_checks(**kwargs)
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/core/checks/registry.py", line 72, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/core/checks/urls.py", line 13, in check_url_config
    return check_resolver(resolver)
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/core/checks/urls.py", line 23, in check_resolver
    return check_method()
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/urls/resolvers.py", line 407, in check
    for pattern in self.url_patterns:
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/utils/functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/urls/resolvers.py", line 588, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/utils/functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/urls/resolvers.py", line 581, in urlconf_module
    return import_module(self.urlconf_name)
  File "/usr/lib/python3.7/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 "/home/mayureshkadam/PycharmProjects/Learning-Django/myproject/myproject/urls.py", line 23, in <module>
    url('myapp/', include('myapp.url'))
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/urls/conf.py", line 34, in include
    urlconf_module = import_module(urlconf_module)
  File "/usr/lib/python3.7/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 "/home/mayureshkadam/PycharmProjects/Learning-Django/myproject/myapp/url.py", line 3, in <module>
    urlpatterns = ['', url('hello/', 'views.hello', name='hello'),]
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/conf/urls/__init__.py", line 13, in url
    return re_path(regex, view, kwargs, name)
  File "/home/mayureshkadam/Learning-Django/lib/python3.7/site-packages/django/urls/conf.py", line 73, in _path
    raise TypeError('view must be a callable or a list/tuple in the case of include().')
TypeError: view must be a callable or a list/tuple in the case of include().

我读过一些教程，代码是从https://www.tutorialspoint.com/django/django_url_mapping.htm引用的但不确定为什么我会收到错误。

Answer 1

只需将 url 替换为 path:

# main urls.py
urlpatterns = [
    path('admin/', admin.site.urls),
    path('myapp/', include('myapp.url'))
]

# app urls.py
from django.urls import path
from .view import hello

urlpatterns = [
    path('hello/', hello, name='hello'),
]

正如您在 documetation 中看到的那样， path 已经被引入(从 Django>=2.0 开始)，所以这里不必使用 url 。您遵循的教程适用于旧版本，因此它使用 url 和正则表达式来生成 URL。