RPM Support

Ticket moved to GitHub: "pulp/pulp_rpm/2246":https://github.com/pulp/pulp_rpm/issues/2246

When I tried to delete a kickstart repository I got the following error in my Task:

(pulp) [vagrant@pulp2-nightly-pulp3-source-centos7 ~]$ http :/pulp/api/v3/tasks/c59c1a92-1ce5-4424-a948-7fbf1124b4f5/
HTTP/1.1 200 OK
Allow: GET, PATCH, DELETE, HEAD, OPTIONS
Connection: Keep-Alive
Content-Length: 1755
Content-Type: application/json
Date: Fri, 01 May 2020 20:13:22 GMT
Keep-Alive: timeout=5, max=10000
Server: gunicorn/20.0.4
Vary: Accept,Cookie
X-Frame-Options: SAMEORIGIN

{
    "child_tasks": [],
    "created_resources": [],
    "error": {
        "description": "(\"Cannot delete some instances of model 'Repository' because they are referenced through a protected foreign key: 'Variant.repository'\", ]>)",
        "traceback": "  File \"/usr/local/lib/pulp/lib64/python3.6/site-packages/rq/worker.py\", line 886, in perform_job\n    rv = job.perform()\n  File \"/usr/local/lib/pulp/lib64/python3.6/site-packages/rq/job.py\", line 664, in perform\n    self._result = self._execute()\n  File \"/usr/local/lib/pulp/lib64/python3.6/site-packages/rq/job.py\", line 670, in _execute\n    return self.func(*self.args, **self.kwargs)\n  File \"/home/vagrant/devel/pulpcore/pulpcore/app/tasks/repository.py\", line 22, in delete\n    models.Repository.objects.filter(pk=repo_id).delete()\n  File \"/usr/local/lib/pulp/lib64/python3.6/site-packages/django/db/models/query.py\", line 710, in delete\n    collector.collect(del_query)\n  File \"/usr/local/lib/pulp/lib64/python3.6/site-packages/django/db/models/deletion.py\", line 224, in collect\n    field.remote_field.on_delete(self, field, sub_objs, self.using)\n  File \"/usr/local/lib/pulp/lib64/python3.6/site-packages/django/db/models/deletion.py\", line 27, in PROTECT\n    sub_objs\n"
    },
    "finished_at": "2020-05-01T20:13:12.201492Z",
    "name": "pulpcore.app.tasks.repository.delete",
    "parent_task": null,
    "progress_reports": [],
    "pulp_created": "2020-05-01T20:13:11.926923Z",
    "pulp_href": "/pulp/api/v3/tasks/c59c1a92-1ce5-4424-a948-7fbf1124b4f5/",
    "reserved_resources_record": [
        "/pulp/api/v3/repositories/rpm/rpm/9581879e-4b4c-4f53-86e9-90319e835ffb/"
    ],
    "started_at": "2020-05-01T20:13:12.082540Z",
    "state": "failed",
    "task_group": null,
    "worker": "/pulp/api/v3/workers/82124443-d497-4889-9075-bed24a6cb29c/"
}