#django

same question but in other words, is there a way to apply the same filtering construct (e.g. Q-objects) to both querysets and lists (or even single items) to maintain DRY? (I hope I won't get kicked for this), something similar to Linq and Linq to SQL in C#/.NET...

sleblanc: please rephrase? I'm not exactly sure what you're getting at

sleblanc: there is a linq-alike lib for python

but... no...currently QuerySets are for constructing SQL queries

what's your real problem here? what are you hoping to solve with this?

So I have a model that inherits from a "PublishableMixin". The mixin adds "publication_date(dt)", "publication_end_date(dt)" and "is_published(bool)" fields to the model. I know how to build a `filter` construct to filter published items from unpublished items. Now I'd like to apply the same construct to a single object, so that its "is_published" method does not lead to code repeat (even worse than that, it's code repeat in a different "lang

uage", so prone to errors)

sleblanc: stop writing walls of text

they're hard to read

Do you want me to apologize?

no, I just want you to not do it again, please

so you want to avoid implementing the same logic in two places

Yes, exactly (sorry for being rude)

certainly agree with the idea

I would like to avoid hitting the database just for this

I know I could do Object.objects.filter(pk=object.pk).filter(…)

I dabbled in C# a few months ago and they have this somehow great feature (IMO) called Linq. It's a subset of SQL-like syntax built into the language, but with additional greatness:

it works with both regular iterables and "database abstractions"

yeah, friend of mine raves about linq

In my opinion, QuerySets and the Q interface could become Django's own Linq

indeed

sleblanc: I think ptone had a project he was working on a while back for that (applying Q objects to lists of Python objects)

the separation layer is somewhat there, too

not sure where it went (if anywhere)

carljm, thanks for the cue

carljm, is this what you were talking about? https://github.com/ptone/django-predicate

sleblanc: yep

Seems like it addresses the needs. Thanks!

I'm having some issues installing the reportlab package in my virtualenv. Any ideas? https://dpaste.de/uax0

bathtub95: it needs to compile stuff, but you don't have the Python headers installed

for your OS install the python-dev package

FunkyBob: Already installed python-dev and still having issues..

Is there any way the virtualenv could be having trouble accessing it? I'm on ubuntu

did you install python dev for the right python version?

you can clearly see there it can't find Python.h

FunkyBob: I just installed python-dev through apt-get.. Wasn't aware there was seperate versions. I'm using python 3.4

then you did a pip uninstall and pip install of reportlab?

and whichever of its deps require comiling

compiling

Yep I started again with a totally new virtualenv. Looks like there is a python3-dev package so I'll try installing that

hmm...

let's say i want to write a datamigration

and i really just want to iterate over all instances and call save()

because i added some magic to save()

somehow my magic in save doesn't get called

(it's defined on an abstract base class)

mbrochh: as it says in the warning here: https://docs.djangoproject.com/en/1.8/topics/mi...

mbrochh: best way would be to abstract that logic so you can call the function independently from save() in your migration

SmileyChris: thanks! makes sense.

yup, that's what i ended up doing.

bathtub95, did you solve your problem? On many distros python-dev (and python- packages) refer to Python 2 instead of 3.

fark... fucking Amazon... breaking command-click on their menu

FunkyBob, I have even seen sites break middle click

eh?

madness

the only solution I could find was to right click → open in new tab

yeah

hey, anyone here ever used Amazon EFS?

Never heard of it, is it new?

seems it may well be...

basically elastic NFSv4 storage

Sounds cool

$0.30 per GB-month

Regarding sites breaking clicks and keyboard handling, there was this interesting piece I read a while ago: https://medium.com/medium-eng/the-curious-case-...