Re: Django ORM and TestCase

Hi,

In TestCase Django wraps all tests within transaction and makes commit and rollback as no-op.

So only code that is within transaction (your test) will see the data.

After test is finished a rollback is issued to remove all the data inserted to db.

And there is no way to read that data outside transaction since its never committed.

29.6.2017 22.01 "howie9393" <howardanguyen@gmail.com> kirjoitti:

I was wondering how django.test.TestCase and the ORM interact. If I create a databased backed object in a TestCase, the ORM can "see" the object when I query for it, as expected.

from django.test import TestCase
class MyTests(TestCase):
    def test_where_is_my_obj(self):
        MyObj.objects.create(...)
        self.assert(MyObj.objects.count(), 1) # this is true as expected

But let's say I put a breakpoint right before the assert statement. If I were to connect to the test database directly using let's say "mysql -u myuser -p test_database_that_django_made", the tables are empty. The MyObj table has no rows. How does the ORM know about this uncommited object? And, how can I see this object in the database shell?

Note: I can get the mysql shell to "see" this object if I use TransactionTestCase instead of TestCase but TransactionTestCase is extremely slow. Also, I'm just like to know how Django "sees" this object in TestCase. Thanks!!

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