Django tests loading fixtures auth.group - django

Question

When I run django tests I get the error:
IntegrityError: Problem installing fixture ... ContentType matching
query does not exist.: (auth.group:pk=2) field_value was
'[u'add_corsmodel', u'corsheaders', u'corsmodel']'
I get the fixtures by doing
python manage.py dumpdata --natural-foreign --exclude=contenttypes --exclude=auth.Permission
How can I solve this? should I exclude some other table?

Answer 1

well I tried to do one simple thing to add permissions.
I've created a .json file and put in data.
[
{
"model": "auth.group",
"fields": {
"name": "foo",
"permissions": [
29,45,46,47,48 //permission ID's created in auth.group
]
}
},
{
"model": "auth.group",
"fields": {
"name": "new_grp",
"permissions": [
29,45,46,47,48
]
}
}
]
this is my initial permissions that I want to include and then
manage.py loaddata <myJsonFIle>
i think in your case it is not able to find the rows or columns in the table that's why it shows IntegrityError

Answer 2

Removing Group from your fixture resolves your issue
because Group depends on Permission which depends on ContentType, both of which were stripped from the export.
Judging from your comments on this question it sounds like you already figured that part out. There is another answer to you question though: Don't use fixtures for test data in Django. Django's documentation suggests you use the TestCase.setUpTestData method to setup your test data. Here's the exert from the documentation: "Tests are more readable and it’s more maintainable to create objects using the ORM."