def clean_username(self):
"""Checks if the user exists and that the username is only -a-zA-Z"""
username = self.cleaned_data.get('username')
# Check that the username is alphanumeric and dash only
# and doesnt start with a dash
if not checkutils.username_correct(username):
# We can safely return only this error because is not a valid
# username so doesn't matter if exists or not the username
raise forms.ValidationError(_(u"Username may only contain alphanumeric characters or dashes and cannot begin with a dash"))
try:
User.objects.get(username=username)
except ObjectDoesNotExist:
return username
# If no exception then wrong user
raise forms.ValidationError(_(u"This username is already taken"))
def test_correct_username(self):
usernames = {
"slok69": True,
"sharem": True,
"-wrong": False,
"right-": True,
"rig-ht": True,
"wro_ng": False,
"wr0ng_": False,
"r1ght-": True,
"_wrong": False,
"w?rong": False,
"wr@ong": False,
"wr#ng": False,
"wrong+": False,
"wro/g": False,
"wro ng": False,
}
for username, result in usernames.items():
self.assertEquals(result, checkutils.username_correct(username))
