def METHOD_NAME(self):
    trek = TrekFactory.create()
    user = UserFactory.create()
    ct = ContentType.objects.get_by_natural_key('trekking', 'trek')
    with connection.cursor() as cur:
        cur.execute(f"""INSERT INTO common_accessibilityattachment
                       (
                       attachment_accessibility_file,
                       content_type_id,
                       object_id,
                       creator_id,
                       random_suffix
                       ) VALUES
                       (
                       'attachments_accessibility/trekking_trek/1/foo.png',
                       {ct.pk},
                       {trek.pk},
                       {user.pk},
                       '')""")
    accessibility_attachment = AccessibilityAttachment.objects.first()
    self.assertEqual(accessibility_attachment.author,
                     '')