postman.query.PostmanQuery breaks in Django 2.0

[Former user]

AttributeError at /messages/inbox/

'PostmanQuery' object has no attribute 'tables'

Request Method:     GET
Request URL:    http://127.0.0.1:8000/messages/inbox/
Django Version:     2.0b1
Exception Type:     AttributeError
Exception Value:    

'PostmanQuery' object has no attribute 'tables'

Exception Location:     postman/query.py in as_sql, line 54

[Patrick Samson]

Fixed in repository.