Я использую Docker, Python и Django в моем TDD проекте. Когда я запускаю команду dcoker на консоли:
docker-compose run app sh -c "python manage.py test"
Ошибка get с сообщением:
Starting recipe-app-api_db_1 ... done
Creating test database for alias 'default'...
System check identified no issues (0 silenced).
...EE....
======================================================================
ERROR: test_wait_for_db (core.tests.test_commands.CommandsTestCase)
Test waiting for db
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/django/core/management/__init__.py", line 103, in call_command
app_name = get_commands()[command_name]
KeyError: 'wait_for_db'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/local/lib/python3.8/unittest/mock.py", line 1348, in patched
return func(*newargs, **newkeywargs)
File "/app/core/tests/test_commands.py", line 24, in test_wait_for_db
call_command('wait_for_db')
File "/usr/local/lib/python3.8/site-packages/django/core/management/__init__.py", line 105, in call_command
raise CommandError("Unknown command: %r" % command_name)
django.core.management.base.CommandError: Unknown command: 'wait_for_db'
======================================================================
ERROR: test_wait_for_db_ready (core.tests.test_commands.CommandsTestCase)
Test waiting for db when db is available
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/django/core/management/__init__.py", line 103, in call_command
app_name = get_commands()[command_name]
KeyError: 'wait_for_db'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/app/core/tests/test_commands.py", line 15, in test_wait_for_db_ready
call_command('wait_for_db')
File "/usr/local/lib/python3.8/site-packages/django/core/management/__init__.py", line 105, in call_command
raise CommandError("Unknown command: %r" % command_name)
django.core.management.base.CommandError: Unknown command: 'wait_for_db'
----------------------------------------------------------------------
Ran 9 tests in 5.529s
FAILED (errors=2)
Destroying test database for alias 'default'...
Исходный код файлов
Файл app/tests/test_commands.py:
from unittest.mock import patch
from django.core.management import call_command
from django.db.utils import OperationalError
from django.test import TestCase
class CommandsTestCase(TestCase):
def test_wait_for_db_ready(self):
"""Test waiting for db when db is available"""
with patch('django.db.utils.ConnectionHandler.__getitem__') as gi:
gi.return_value = True
call_command('wait_for_db')
self.assertEqual(gi.call_count, 1)
@patch('time.sleep', return_value=None)
def test_wait_for_db(self, ts):
"""Test waiting for db"""
with patch('django.db.utils.ConnectionHandler.__getitem__') as gi:
gi.side_effect = [OperationalError] * 5 + [True]
call_command('wait_for_db')
self.assertEqual(gi.call_count, 6)
Файл app/core/managment/commands/wait_for_db.py:
import time
from django.db import connection
from django.db.utils import OperationalError
from django.core.management.base import BaseCommand
class Command(BaseCommand):
"""Django command that waits for database to be available"""
def handle(self, *args, **options):
"""Handle the command"""
self.stdout.write('Waiting for database...')
db_conn = None
while not db_conn:
try:
connection.ensure_connection()
db_conn = True
except OperationalError:
self.stdout.write('Database unavailable, waiting 1 second...')
time.sleep(1)
self.stdout.write(self.style.SUCCESS('Database available!'))
Почему docker не удается найти мой wait_for_db командный файл?