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"""
Management utility to create superusers.
"""
import getpass
import sys
from django.contrib.auth import get_user_model
from django.contrib.auth.management import get_default_username
from django.contrib.auth.password_validation import validate_password
from django.core import exceptions
from django.core.management.base import BaseCommand, CommandError
from django.db import DEFAULT_DB_ALIAS
from django.utils.text import capfirst
class NotRunningInTTYException(Exception):
pass
PASSWORD_FIELD = 'password'
class Command(BaseCommand):
help = 'Used to create a superuser.'
requires_migrations_checks = True
stealth_options = ('stdin',)
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.UserModel = get_user_model()
self.username_field = self.UserModel._meta.get_field(self.UserModel.USERNAME_FIELD)
def add_arguments(self, parser):
parser.add_argument(
'--%s' % self.UserModel.USERNAME_FIELD,
help='Specifies the login for the superuser.',
)
parser.add_argument(
'--noinput', '--no-input', action='store_false', dest='interactive',
help=(
'Tells Django to NOT prompt the user for input of any kind. '
'You must use --%s with --noinput, along with an option for '
'any other required field. Superusers created with --noinput will '
'not be able to log in until they\'re given a valid password.' %
self.UserModel.USERNAME_FIELD
),
)
parser.add_argument(
'--database',
default=DEFAULT_DB_ALIAS,
help='Specifies the database to use. Default is "default".',
)
for field in self.UserModel.REQUIRED_FIELDS:
parser.add_argument(
'--%s' % field,
help='Specifies the %s for the superuser.' % field,
)
def execute(self, *args, **options):
self.stdin = options.get('stdin', sys.stdin) # Used for testing
return super().execute(*args, **options)
def handle(self, *args, **options):
username = options[self.UserModel.USERNAME_FIELD]
database = options['database']
user_data = {}
verbose_field_name = self.username_field.verbose_name
try:
self.UserModel._meta.get_field(PASSWORD_FIELD)
except exceptions.FieldDoesNotExist:
pass
else:
# If not provided, create the user with an unusable password.
user_data[PASSWORD_FIELD] = None
try:
if options['interactive']:
# Same as user_data but with foreign keys as fake model
# instances instead of raw IDs.
fake_user_data = {}
if hasattr(self.stdin, 'isatty') and not self.stdin.isatty():
raise NotRunningInTTYException
default_username = get_default_username()
if username:
error_msg = self._validate_username(username, verbose_field_name, database)
if error_msg:
self.stderr.write(error_msg)
username = None
elif username == '':
raise CommandError('%s cannot be blank.' % capfirst(verbose_field_name))
# Prompt for username.
while username is None:
message = self._get_input_message(self.username_field, default_username)
username = self.get_input_data(self.username_field, message, default_username)
if username:
error_msg = self._validate_username(username, verbose_field_name, database)
if error_msg:
self.stderr.write(error_msg)
username = None
continue
user_data[self.UserModel.USERNAME_FIELD] = username
fake_user_data[self.UserModel.USERNAME_FIELD] = (
self.username_field.remote_field.model(username)
if self.username_field.remote_field else username
)
# Prompt for required fields.
for field_name in self.UserModel.REQUIRED_FIELDS:
field = self.UserModel._meta.get_field(field_name)
user_data[field_name] = options[field_name]
while user_data[field_name] is None:
message = self._get_input_message(field)
input_value = self.get_input_data(field, message)
user_data[field_name] = input_value
fake_user_data[field_name] = input_value
# Wrap any foreign keys in fake model instances
if field.remote_field:
fake_user_data[field_name] = field.remote_field.model(input_value)
# Prompt for a password if the model has one.
while PASSWORD_FIELD in user_data and user_data[PASSWORD_FIELD] is None:
password = getpass.getpass()
password2 = getpass.getpass('Password (again): ')
if password != password2:
self.stderr.write("Error: Your passwords didn't match.")
# Don't validate passwords that don't match.
continue
if password.strip() == '':
self.stderr.write("Error: Blank passwords aren't allowed.")
# Don't validate blank passwords.
continue
try:
validate_password(password2, self.UserModel(**fake_user_data))
except exceptions.ValidationError as err:
self.stderr.write('\n'.join(err.messages))
response = input('Bypass password validation and create user anyway? [y/N]: ')
if response.lower() != 'y':
continue
user_data[PASSWORD_FIELD] = password
else:
# Non-interactive mode.
if username is None:
raise CommandError('You must use --%s with --noinput.' % self.UserModel.USERNAME_FIELD)
else:
error_msg = self._validate_username(username, verbose_field_name, database)
if error_msg:
raise CommandError(error_msg)
user_data[self.UserModel.USERNAME_FIELD] = username
for field_name in self.UserModel.REQUIRED_FIELDS:
if options[field_name]:
field = self.UserModel._meta.get_field(field_name)
user_data[field_name] = field.clean(options[field_name], None)
else:
raise CommandError('You must use --%s with --noinput.' % field_name)
self.UserModel._default_manager.db_manager(database).create_superuser(**user_data)
if options['verbosity'] >= 1:
self.stdout.write("Superuser created successfully.")
except KeyboardInterrupt:
self.stderr.write('\nOperation cancelled.')
sys.exit(1)
except exceptions.ValidationError as e:
raise CommandError('; '.join(e.messages))
except NotRunningInTTYException:
self.stdout.write(
'Superuser creation skipped due to not running in a TTY. '
'You can run `manage.py createsuperuser` in your project '
'to create one manually.'
)
def get_input_data(self, field, message, default=None):
"""
Override this method if you want to customize data inputs or
validation exceptions.
"""
raw_value = input(message)
if default and raw_value == '':
raw_value = default
try:
val = field.clean(raw_value, None)
except exceptions.ValidationError as e:
self.stderr.write("Error: %s" % '; '.join(e.messages))
val = None
return val
def _get_input_message(self, field, default=None):
return '%s%s%s: ' % (
capfirst(field.verbose_name),
" (leave blank to use '%s')" % default if default else '',
' (%s.%s)' % (
field.remote_field.model._meta.object_name,
field.remote_field.field_name,
) if field.remote_field else '',
)
def _validate_username(self, username, verbose_field_name, database):
"""Validate username. If invalid, return a string error message."""
if self.username_field.unique:
try:
self.UserModel._default_manager.db_manager(database).get_by_natural_key(username)
except self.UserModel.DoesNotExist:
pass
else:
return 'Error: That %s is already taken.' % verbose_field_name
if not username:
return '%s cannot be blank.' % capfirst(verbose_field_name)
try:
self.username_field.clean(username, None)
except exceptions.ValidationError as e:
return '; '.join(e.messages)
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