Fix not working former_ids. Add support for "Invalid accounts". Now when id from former_ids tries to create a profile "This account is invalid." error message is displayed. Compare emails in lower cases to prevent changing User email to the same email with different character casing (needs some more testing).
Patch by: Pawel Solyga
from django.core.management.base import NoArgsCommand, CommandError
class Command(NoArgsCommand):
help = "Runs the command-line client for the current DATABASE_ENGINE."
requires_model_validation = False
def handle_noargs(self, **options):
from django.db import connection
try:
connection.client.runshell()
except OSError:
# Note that we're assuming OSError means that the client program
# isn't installed. There's a possibility OSError would be raised
# for some other reason, in which case this error message would be
# inaccurate. Still, this message catches the common case.
raise CommandError('You appear not to have the %r program installed or on your path.' % \
connection.client.executable_name)