I assign each user either group A or B, and by default web2py assign users
to the user_%d groups. I would like to query which users are in groups A,
B, and NULL so that (1) I can verify each user is in the right group and
(2) no users are in zero groups.
I have this controller
users = db(~db.auth_group.role.like('user%')).select(db.auth_user.id, db.
auth_user.first_name, db.auth_user.last_name, db.auth_group.role,
left=(db.auth_membership.on(db.auth_user.id==db.auth_membership.
user_id), db.auth_group.on(db.auth_membership.group_id==db.auth_group.id)),
orderby=db.auth_user.id|db.auth_group.id)
response.flash=db._lastsql
return dict(users=users)
Which generates this SQL
SELECT auth_user.id
,auth_user.first_name
,auth_user.last_name
,auth_group.ROLE
FROM auth_user
LEFT JOIN auth_membership ON (auth_user.id = auth_membership.user_id)
LEFT JOIN auth_group ON (auth_membership.group_id = auth_group.id)
WHERE (NOT (auth_group.ROLE LIKE 'user%' ESCAPE '\'))
ORDER BY auth_user.id
,auth_group.id;
However, users with no groups are omitted. I could use something more like
this:
SELECT auth_user.id
,auth_user.first_name
,auth_user.last_name
,auth_group.ROLE
FROM auth_user
LEFT JOIN auth_membership ON (auth_user.id = auth_membership.user_id)
LEFT JOIN auth_group ON auth_membership.group_id = auth_group.id and
NOT auth_group.ROLE LIKE 'user%'
ORDER BY auth_user.id
,auth_group.id;
I could use executesql(), but I am trying to not give up too easily on the
DAL. Also, using DAL it's easy to use SQLTABLE in the view.
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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