#26540: Can't run tests without "default" connection set
-------------------------------------+-------------------------------------
Reporter: marcinn | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 1.8
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by marcinn):
Setting `dummy` backend results:
{{{
Traceback (most recent call last):
File
"/home/marcin/myproject/eggs/Django-1.8.6-py2.7.egg/django/test/testcases.py",
line 946, in setUpClass
if not connections_support_transactions():
File
"/home/marcin/myproject/eggs/Django-1.8.6-py2.7.egg/django/test/testcases.py",
line 911, in connections_support_transactions
for conn in connections.all())
File
"/home/marcin/myproject/eggs/Django-1.8.6-py2.7.egg/django/test/testcases.py",
line 911, in <genexpr>
for conn in connections.all())
File
"/home/marcin/myproject/eggs/Django-1.8.6-py2.7.egg/django/utils/functional.py",
line 59, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File
"/home/marcin/myproject/eggs/Django-1.8.6-py2.7.egg/django/db/backends/base/features.py",
line 216, in supports_transactions
with self.connection.cursor() as cursor:
File
"/home/marcin/myproject/eggs/Django-1.8.6-py2.7.egg/django/db/backends/base/base.py",
line 164, in cursor
cursor = self.make_cursor(self._cursor())
File
"/home/marcin/myproject/eggs/Django-1.8.6-py2.7.egg/django/db/backends/dummy/base.py",
line 21, in complain
raise ImproperlyConfigured("settings.DATABASES is improperly
configured. "
ImproperlyConfigured: settings.DATABASES is improperly configured. Please
supply the ENGINE value. Check settings documentation for more details.
}}}
> The fact that the default database is mandatory is documented in the
DATABASES setting
Yes, but it looks like it could be empty before (?) - #19775.
> There are still places in Django core code depending on a default
database (See #13528 for example).
Yes, also during models registration the default connection is used to
truncate table names (or something like that). The sqlite3 handler (my
"default") is preparing some stuff for postgres and mysql (in my case). It
seems that db router is not used at this stage.
--
Ticket URL: <https://code.djangoproject.com/ticket/26540#comment:2>
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