[英]Django external mysql db connection in test complains “unknown database”
在我的django项目中,我有一些数据库连接:
例如。
DATABASES = {
"default": {
"ENGINE": "django.db.backends.postgresql_psycopg2",
"NAME": "awesome",
...
},
"other_1": {
"ENGINE": "django.db.backends.postgresql_psycopg2",
"NAME": "other_1",
"TEST": {"MIRROR": default}
...
},
"other_2": {
"ENGINE": "django.db.backends.mysql",
"NAME": "other_2",
"TEST": {"MIRROR": default}
}
}
注意:
default
和other_1
都是postgres
后端, other_2
是mysql
后端。 "TEST": {"MIRROR": default}
,以避免在测试期间创建这些数据库。 看到这个链接 。 问题:
当我运行测试时,它抱怨Unknown database 'test_awesome'
,堆栈跟踪显示它来自MYSQL后端:
Traceback (most recent call last):
File "/Users/jlin/virtualenvs/awesome-1SH6mAZ2/lib/python3.6/site-packages/django/test/testcases.py", line 1005, in setUpClass
if not connections_support_transactions():
File "/Users/jlin/virtualenvs/awesome-1SH6mAZ2/lib/python3.6/site-packages/django/test/testcases.py", line 970, in connections_support_transactions
...
File "/Users/jlin/virtualenvs/awesome-1SH6mAZ2/lib/python3.6/site-packages/MySQLdb/__init__.py", line 85, in Connect
return Connection(*args, **kwargs)
File "/Users/jlin/virtualenvs/awesome-1SH6mAZ2/lib/python3.6/site-packages/MySQLdb/connections.py", line 204, in __init__
super(Connection, self).__init__(*args, **kwargs2)
django.db.utils.OperationalError: (1049, "Unknown database 'test_awesome'")
如果我注释掉other_2
连接,则测试运行正常。
看起来问题出在后台吗?
我研究了setup_database
代码 ,如果我删除了mirrored_aliases
字典中的other_2
,那么我的测试代码可以正常工作。
因此,我创建了一个测试运行器类来删除other_2
连接,因为它太深了,无法从mirriored_aliases
删除。
class TestRunner(DiscoverRunner):
def setup_databases(self, **kwargs):
# to get around this problem
# https://stackoverflow.com/questions/54189925/django-external-mysql-db-connection-in-test-complains-unknown-database
settings.DATABASES.pop('other_2', None)
return super(TestRunner, self).setup_databases(**kwargs)
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