Ticket #11127: regex.diff

django/contrib/auth/forms.py

@@ -56 +56 @@
     Base class for authenticating users. Extend this to get a form that accepts
     username/password logins.
     """
-    username = forms.CharField(label=_("Username"), max_length=30)
+    username = forms.RegexField(label=_("Username"), max_length=30, regex=r'^\w+$',
+        help_text = _("Required. 30 characters or fewer. Alphanumeric characters only (letters, digits and underscores)."),
+        error_message = _("This value must contain only letters, numbers and underscores."))
     password = forms.CharField(label=_("Password"), widget=forms.PasswordInput)
 
     def __init__(self, request=None, *args, **kwargs):