93 lines
3.5 KiB
Python
93 lines
3.5 KiB
Python
|
from importlib import import_module
|
||
|
|
||
|
from django.apps import apps
|
||
|
from django.core.management.base import BaseCommand, CommandError
|
||
|
from django.core.management.color import no_style
|
||
|
from django.core.management.sql import emit_post_migrate_signal, sql_flush
|
||
|
from django.db import DEFAULT_DB_ALIAS, connections
|
||
|
|
||
|
|
||
|
class Command(BaseCommand):
|
||
|
help = (
|
||
|
"Removes ALL DATA from the database, including data added during "
|
||
|
'migrations. Does not achieve a "fresh install" state.'
|
||
|
)
|
||
|
stealth_options = ("reset_sequences", "allow_cascade", "inhibit_post_migrate")
|
||
|
|
||
|
def add_arguments(self, parser):
|
||
|
parser.add_argument(
|
||
|
"--noinput",
|
||
|
"--no-input",
|
||
|
action="store_false",
|
||
|
dest="interactive",
|
||
|
help="Tells Django to NOT prompt the user for input of any kind.",
|
||
|
)
|
||
|
parser.add_argument(
|
||
|
"--database",
|
||
|
default=DEFAULT_DB_ALIAS,
|
||
|
help='Nominates a database to flush. Defaults to the "default" database.',
|
||
|
)
|
||
|
|
||
|
def handle(self, **options):
|
||
|
database = options["database"]
|
||
|
connection = connections[database]
|
||
|
verbosity = options["verbosity"]
|
||
|
interactive = options["interactive"]
|
||
|
# The following are stealth options used by Django's internals.
|
||
|
reset_sequences = options.get("reset_sequences", True)
|
||
|
allow_cascade = options.get("allow_cascade", False)
|
||
|
inhibit_post_migrate = options.get("inhibit_post_migrate", False)
|
||
|
|
||
|
self.style = no_style()
|
||
|
|
||
|
# Import the 'management' module within each installed app, to register
|
||
|
# dispatcher events.
|
||
|
for app_config in apps.get_app_configs():
|
||
|
try:
|
||
|
import_module(".management", app_config.name)
|
||
|
except ImportError:
|
||
|
pass
|
||
|
|
||
|
sql_list = sql_flush(
|
||
|
self.style,
|
||
|
connection,
|
||
|
reset_sequences=reset_sequences,
|
||
|
allow_cascade=allow_cascade,
|
||
|
)
|
||
|
|
||
|
if interactive:
|
||
|
confirm = input(
|
||
|
"""You have requested a flush of the database.
|
||
|
This will IRREVERSIBLY DESTROY all data currently in the "%s" database,
|
||
|
and return each table to an empty state.
|
||
|
Are you sure you want to do this?
|
||
|
|
||
|
Type 'yes' to continue, or 'no' to cancel: """
|
||
|
% connection.settings_dict["NAME"]
|
||
|
)
|
||
|
else:
|
||
|
confirm = "yes"
|
||
|
|
||
|
if confirm == "yes":
|
||
|
try:
|
||
|
connection.ops.execute_sql_flush(sql_list)
|
||
|
except Exception as exc:
|
||
|
raise CommandError(
|
||
|
"Database %s couldn't be flushed. Possible reasons:\n"
|
||
|
" * The database isn't running or isn't configured correctly.\n"
|
||
|
" * At least one of the expected database tables doesn't exist.\n"
|
||
|
" * The SQL was invalid.\n"
|
||
|
"Hint: Look at the output of 'django-admin sqlflush'. "
|
||
|
"That's the SQL this command wasn't able to run."
|
||
|
% (connection.settings_dict["NAME"],)
|
||
|
) from exc
|
||
|
|
||
|
# Empty sql_list may signify an empty database and post_migrate
|
||
|
# would then crash.
|
||
|
if sql_list and not inhibit_post_migrate:
|
||
|
# Emit the post migrate signal. This allows individual applications to
|
||
|
# respond as if the database had been migrated from scratch.
|
||
|
emit_post_migrate_signal(verbosity, interactive, database)
|
||
|
else:
|
||
|
self.stdout.write("Flush cancelled.")
|