#django

love my mac :)

just swapped all my parts into a brand new bottom chassis with new keyboard touchpad it feels like a million bucks again

was given a macbook air for work once

loathed the keyboard

otherwise, was a nice toy

but the OS was too "our way is the only way" for me... personal preference thing, really

I know that feeling. I've ripped out and minimally rewritten bits of my desktop which tried to force their workflow on me.

i like the macbook pro keyboard more than any other’s ive ever come across

dang`r`us: are you still there? I went through File Uploads docs again, the file data is placed in request.FILES, but what if I wanted to save it to db without going through form or view?

Do i need to just point to the path of the file?

Hello guys, here's what i am trying to do, serve songs from db to a player, https://dpaste.de/tU1U I thought about create function from docs, but am confused about what to put in the second param?

Forgive me if I misuse a technical word, I am open to corrections :)

Hi guys

anyone online!?

greetings. is it wise to derive my models from anything other than Model?

Well, ultimately they have to derive from Model.

That could be through some chain of subclasses, of course.

And mixins may provide other functionality or additional fields..

ah. perhaps what I need is a mixin

what I noticed is that w the auto-generated admin interface, the class name listed is the top one of the inheritance tree (in my case User).. .the link is correct, tho

so from this I've gathered that the admin interface goes all the way up until it finds Model as a parent, then uses that subclass.

heya

ill show you my project when its done

going to dploy it on heroku

User as in django.contrib.auth.models.User? That shouldn't really be subclassed..

I'm reading http://www.effectivedjango.com/tutorial/forms.html and they have something that I cannot quite google properly, Class Meta: model ='foo'. So, class Meta means that you're defining meta data on your class, and in this case the model = means you're extending that class?

mattmcc, ok. should I set up an FK instead?

jonez: Well, if you want to customize the user model, there are proper ways to do that.

hmmm.. in this case I prolly do not need a User for every Athlete or Judge

hmmm is it a pain to add more stuff to models

Valduare: 'Stuff' like..?

how do you deal with defaults and such without pulling hair out

b0nn: Not quite. The class, a ModelForm, needs to know which model it's working with. That Meta class is how you specify it.

b0nn: Once it knows what model class it's meant for, it can inspect that model to generate form fields for each corresponding model field.

oh, ok, that makes sense

o/

I have some svg pictures which gets generated dynamically how to serve them in django?

anyone have a link for adding image uploads for simple blog

Haudegen: A view can return the image, then <img src="{% url 'view_returning svg' %}">

psy123, creating a file without using a view is not explicitly covered by the docs (I think), but I can show you how. Gimme a sec.

Valduare: ImageField?

dang`r`us: Yes please, I started to wonder why I want to do it this way

is my client bugging with me

i'm using django behave but I need to delay after clicking a menu item to click on a submenu. How do I do that?

psy123, https://dpaste.de/r90U

psy123, in this case I have a file name (fn) which references an existing file *outside of django*

Hi, I was thinking if there is a way to do one query for Class.objects.all.filter(online=True) and then .filter(online=False). I can check it in django but it's worse performing.

Yes

psy123, the interesting part is the use of django.core.files.File

which you wrap around a file handle

a file handle is what python's open() gives you

Darkhunter: I'm not sure what you're asking, then.

Class.objects.all() would be one query.

But it sounds like you've already done that.

.all.filter can be condensed to .filter

dang`r`us: what about HostImage?

psy123, its details are of no importance to you. See the comment on line 12 for all you need to know

hey

can you all see my messages

mattmcc, I think they want online, offline = Class.objects.magic()

cause im bugging out

lolol, yes

dang`r`us: Yes!

ok

I just don't want to do repeated query...

Darkhunter: It's not a repeated query. One query has online=True, the other has online=False.

Darkhunter, one query = one result set; never two.

dang`r`us: Okay thank you very much :) I am gonna read about File

I know, okay guys...My advanced logging is telling me that I am doing repeated query here :/

Okay, then how do you define 'repeated'?

Darkhunter, yes, two queries, but for different result sets

Darkhunter - you can do `qs = Class.objects.all()` - you can then used that cached queryset to not not the DB again: `qs.filter(online=False)` etc

mcspud: That will produce a new QuerySet instance.

mattmcc: so would i add an imageField to the post class or would image be a new class to hold its meta data?

You sure mattmcc?

mcspud: Yes, Django can't "filter" cached result sets.

interdasting

Yes, thanks anyway. I hope this won't be bottleneck of our program :D

If you don't already know, then you're prematurely optimizing.

But as a general rule, one big query is not automatically better than two smaller ones.

People frequently get hung up on query count without reason.

mattmcc: Well, our program is ready, but too slow so we are optimizing.

Do you know _why_ it's slow?

Measure. Identify the bottlenecks, rather than guessing at them.

mattmcc: We are actually using drf and serialization takes too much time. I was on drf irc, but they couldn't help me anymore...I did all the optimalization they knew...

mattmcc big queries normally means bad table design

unless you're running an enterprise data like facebook

petabytes of profiles.

Valduare: Depends. Does a post have just one image?

will have many

Valduare: So you probably want another model.