[8721] introduced some internal field names. We hide them from the list of

valid field names in debugging output so that it doesn't confuse things.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@8730 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/options.py

@@ -280,7 +280,9 @@ class Options(object):
     def get_all_field_names(self):
         """
         Returns a list of all field names that are possible for this model
-        (including reverse relation names).
+        (including reverse relation names). This is used for pretty printing
+        debugging output (a list of choices), so any internal-only field names
+        are not included.
         """
         try:
             cache = self._name_map
@@ -288,7 +290,9 @@ class Options(object):
             cache = self.init_name_map()
         names = cache.keys()
         names.sort()
-        return names
+        # Internal-only names end with "+" (symmetrical m2m related names being
+        # the main example). Trim them.
+        return [val for val in names if not val.endswith('+')]
 
     def init_name_map(self):
         """

tests/regressiontests/m2m_regress/models.py

@@ -52,5 +52,12 @@ __test__ = {"regressions": """
 >>> e1.related.all()
 [<Tag: t2>]
 
+# The secret internal related names for self-referential many-to-many fields
+# shouldn't appear in the list when an error is made.
+>>> SelfRefer.objects.filter(porcupine='fred')
+Traceback (most recent call last):
+...
+FieldError: Cannot resolve keyword 'porcupine' into field. Choices are: id, name, references, related
+
 """
 }