Fixed AttributeError raised by data property being silently ignored (#9455)

Signed-off-by: James Riley McHugh <mchugh_james@bah.com>
Co-authored-by: James Riley McHugh <mchugh_james@bah.com>

rest_framework/request.py

@@ -217,6 +217,7 @@ class Request:
     @property
     def data(self):
         if not _hasattr(self, '_full_data'):
+            with wrap_attributeerrors():
                 self._load_data_and_files()
         return self._full_data
 
@@ -420,12 +421,13 @@ class Request:
             _request = self.__getattribute__("_request")
             return getattr(_request, attr)
         except AttributeError:
-            return self.__getattribute__(attr)
+            raise AttributeError(f"'{self.__class__.__name__}' object has no attribute '{attr}'")
 
     @property
     def POST(self):
         # Ensure that request.POST uses our request parsing.
         if not _hasattr(self, '_data'):
+            with wrap_attributeerrors():
                 self._load_data_and_files()
         if is_form_media_type(self.content_type):
             return self._data
@@ -437,6 +439,7 @@ class Request:
         # Different from the other two cases, which are not valid property
         # names on the WSGIRequest class.
         if not _hasattr(self, '_files'):
+            with wrap_attributeerrors():
                 self._load_data_and_files()
         return self._files
 

tests/test_request.py

@@ -126,6 +126,25 @@ class TestContentParsing(TestCase):
         request.parsers = (PlainTextParser(), )
         assert request.data == content
 
+    def test_calling_data_fails_when_attribute_error_is_raised(self):
+        """
+        Ensure attribute errors raised when parsing are properly re-raised.
+        """
+        expected_message = "Internal error"
+
+        class BrokenParser:
+            media_type = "application/json"
+
+            def parse(self, *args, **kwargs):
+                raise AttributeError(expected_message)
+
+        http_request = factory.post('/', data={}, format="json")
+        request = Request(http_request)
+        request.parsers = (BrokenParser,)
+
+        with self.assertRaisesMessage(WrappedAttributeError, expected_message):
+            request.data
+
 
 class MockView(APIView):
     authentication_classes = (SessionAuthentication,)