in airavata_django_portal_sdk/migrations/0002_userfiles_file_resource_id.py [0:0]
def delete_user_file_entries(apps, schema_editor):
# UserFiles table is just a cache of generated Data Product URIs for files
# in directory listings. We can wipe it out safely. The existing entries
# need to be deleted because this migration adds a new non-nullable field,
# file_resource_id, and there's no good default for existing entries.
UserFiles = apps.get_model('airavata_django_portal_sdk', 'UserFiles')
UserFiles.objects.all().delete()