Am 25.07.2017 um 12:59 schrieb vinny:
On 2017-07-25 11:40, Thomas Güttler wrote:
I would like to reduce the "ifing and elsing" in my python code (less
conditions, less bugs, more SQL, more performance)
Regards,
Thomas Güttler
A quick brainstorm:
You could, probably...
but you'd have to create a separate database user for every Django user,
get Django to connect to the database as that user
and setup policies for each of those users, for every use-case.
Yes, this could be done. ... I am unsure
When I look at an example policy from the manual:
CREATE POLICY fp_u ON information FOR UPDATE
USING (group_id <= (SELECT group_id FROM users WHERE user_name =
current_user));
I'm not sure if this is any less bug-sensitive than an IF in Python...
Somehow I trust set operations more then "if" and "else" in a programming
language.
And don't forget you have to interpret any error-response from the database into
something that Django can make understandable to the end-user.
Yes? An internal server error is an internal server error. I don't think that
you
can create anything understandable. You can reply "We are sorry".
But maybe I misunderstood what you mean with "error-response from the
database".
I'm not saying row-level security is bad, far from it, but I doubt that using it
to replace Django's own security is going to magically make life much easier.
My current concer: I want a SELECT statement wich returns all rows a user is
allowed to see.
This mean all conditions in my python/django code won't help me. I need a way to
create a WHERE clause for this. If I need this in a WHERE clause, then I don't
want
to have two implementations (once in python, once in SQL-WHERE clause).
How to create the WHERE clause is a different topic. I like the django ORM
filter methods very much.
Next thing is where to apply the WHERE.
I could create it in django, or use PG feature "Row Security Policies" ...
Using Django-ORM-Filter-methods in "Row Security Policies" would be cool ...
This is brainstorming and I am just trying to widen my horizont. Feedback
welcome!
Regards,
Thomas Güttler
--
Thomas Guettler http://www.thomas-guettler.de/
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