Fixed #32195 -- Added system check for invalid view in path() and improved error messages.

2 files changed, 25 insertions, 0 deletions

diff --git a/django/urls/conf.py b/django/urls/conf.py
index 119e95df41..b3937d5512 100644
--- a/django/urls/conf.py
+++ b/django/urls/conf.py
@@ -55,6 +55,8 @@ def include(arg, namespace=None):
 
 
 def _path(route, view, kwargs=None, name=None, Pattern=None):
+    from django.views import View
+
     if isinstance(view, (list, tuple)):
         # For include(...) processing.
         pattern = Pattern(route, is_endpoint=False)
@@ -69,6 +71,12 @@ def _path(route, view, kwargs=None, name=None, Pattern=None):
     elif callable(view):
         pattern = Pattern(route, name=name, is_endpoint=True)
         return URLPattern(pattern, view, kwargs, name)
+    elif isinstance(view, View):
+        view_cls_name = view.__class__.__name__
+        raise TypeError(
+            f'view must be a callable, pass {view_cls_name}.as_view(), not '
+            f'{view_cls_name}().'
+        )
     else:
         raise TypeError('view must be a callable or a list/tuple in the case of include().')
 
diff --git a/django/urls/resolvers.py b/django/urls/resolvers.py
index fac77fc4bc..674fd0c58e 100644
--- a/django/urls/resolvers.py
+++ b/django/urls/resolvers.py
@@ -345,6 +345,7 @@ class URLPattern:
     def check(self):
         warnings = self._check_pattern_name()
         warnings.extend(self.pattern.check())
+        warnings.extend(self._check_callback())
         return warnings
 
     def _check_pattern_name(self):
@@ -361,6 +362,22 @@ class URLPattern:
         else:
             return []
 
+    def _check_callback(self):
+        from django.views import View
+
+        view = self.callback
+        if inspect.isclass(view) and issubclass(view, View):
+            return [Error(
+                'Your URL pattern %s has an invalid view, pass %s.as_view() '
+                'instead of %s.' % (
+                    self.pattern.describe(),
+                    view.__name__,
+                    view.__name__,
+                ),
+                id='urls.E009',
+            )]
+        return []
+
     def resolve(self, path):
         match = self.pattern.match(path)
         if match: