DjangoBot: #django

SQS + pickles = tasty

rather than pass in a whole slew of keyword args in a constructor,

can i build a dict and pass it instead?

eg will it be interpretted as kwargs?

is django's supplied comments app the preferred one?

evening everyone

anyone tell me how i can let my urls support - (dashes) in my named param? -- (r'^article/(?P<article>\w+)/$', 'wattz.main.views.article'),

how can I save an image within a view (posted data) that is in a generic relation? Example, I have a post with images=generic.GenericRelation(Image) and in my view I want to add the image from the posted form

okay, nevermind, answered my own question... thanks for looking :)

I did a project with django a while back and really enjoyed it. I'm going to be starting another pretty soon, and I'll probably use django again.

anyone know how to determine the class/type of a parameter

Is there a good place (like besides wading through commit logs) to see the changes to the dev version since the last time I used it?

i know in actionscript it if (value is String)

but i just googled the is keywork and it appears to check where something is in memory, not its type

like, in python?

yeah

i want to know if something is a key or a model

isinstance

so i can get the model if its a key

thanks

anyone tell me how i can let my urls support - (dashes) in my named param? -- (r'^article/(?P<article>\w+)/$', 'wattz.main.views.article'),

Same way you support them in any regular expression?

that's what i mean

Well, suppose you have a set of characters you want to support.

What's the regular-expression construct for that?

\-

whoa, ubernostrum. thank you for your blog!

Suppose you want to match, say, the letter 'a' or the letter 'q'.

[aq]

Suppose you want to match, say, a dash or the letter 'x'.

[-x]

Suppose you want to match, say, a dash or a word character.

[-\w]

that probably won't work

since - is also a non-greedy expansion

you will probably need to escape it with a \

However, you may not need to escape it inside of a character class

Actually, it works just fine.

does it work if you try it outside of a class?

Yes.

kerwhat?

does python's regex not have the non-greedy match?

I think you'd have to escape the - in the [] since it's an interpreted character. Because you can do [a-z], and that doesn't mean a z and -

import re

pat = re.compile('\w-\w')

pat.match('a-q')

^-- returns a match

it does have non-greedy matching

pat.match('aq')

^-- returns no match.

Welcome to regular expressions.

every implementation is so different I never know exactly what to expect ><

the one I've used recently has a meaning for -

adding a ? after the qualifiers make them non-greedy

Tem: what flavor was that?

Lua

as in *? , +? , and ??

Tem: ah.. well, I've found that googling for "<languagename> regular expressions" usually yields a page with the complete syntax reference =)

I'd never heard of any regex flavor using - outside character classes

you're absolutely right, but usually I just go on memory until I end up with a frustrating bug

I actually use a tool called RegexBuddy to do my more complex regexes since it can export the regex in quite many different flavors and has some other helpful features

that sounds handy

RegexBuddy is really nice

oh

it's not free

also windows

It's the best $40 I spent

It works with WIne

I haven't yet messed with wine

Yep, it's worth it easily =)

The current version has a bug where it doesn't assign a window properly in wine, but I emailed the developer and he fixed that within a couple of days with the debug version

If you use MySQL, mysql query browser has a nice regex tool in it as well. And it's free.

So if you use it on wine, grab the debug version to get around the problem with it now showing up in the task panel or window selector

Other than that it runs perfectly on linux

I like being able to save my regexes to a library for future use

In the meantime, I think you could swapout your \w+ for \S+

What's the proper way to assign permissions to a user?

via code, not the admin interface

I looked, it doesn't say AFAICT

myuser.user_permissions.add(permission, permission, ...)

Cool, thanks.

Ah, it is there — sorry 'bout that.

hello

can someone give a hint how to implement sql request and page generation time counter?

ok, about sql queries number and time i found. but how can i count full page generation time? when should i start counter?

I'm looking for you, neanton, but I don't know off the top of my head

you can't really do that easily

I think this is exactly what I need.. http://www.djangosnippets.org/snippets/358/

unless you don't need it displayed on a page

hmm, that's an interesting way of doing it in that middleware

Magus-, can I register a new template tag in a middleware?

of course not

;(

Hey. Has anyone tried putting a simple FreeComment page up in AppEngine?

you can't use django models in GAE

replacing comment text sucks to my mind

so no comments

I'm interested in extending a single, simple HTML page with a comment roll.

oh, bummer.

and appengine questions belong in appengine help channels/mailing lists :)

I'm looking for an option and I was hoping that was it.

Magus-, what is GAE?..

Good point, but the Django people are so much smarter! ;)

google app engine, neanton.....

Alright. I went and bugged them. Thanks for the direction, crew.

If anyone knows of a good solution for what I'm after, I'd appreciate a PM if you have the time/generosity.

unless someone wrote a comments app for GAE, you get to write your own

there isn't much leeway there ;)

word. you're the man. thanks.

Magus-, can I define some variable in middleware that will be accessible in my template?

no

Magus, you do realize you've become one of my heroes, right?

you're always on here, being so helpful

I'm trying to find documentation for establishing foreign keys from one app's model to another

does anybody know where that documentation is?

irish, field = models.ForeighnKey(OtherModel)

that works from one app to another?

yes

if you import the other model, of course

ah!

what happens if two models have a same-name class defined and one imports the other?

i think that naming model with the same name is not good

I agree

but I have a ton of models

I wouldn't be surprised if I had a few models that were named similarly, at this point

but maybe from bla.bla import User as UserObj

this is just a guess

understood

oh, and does anybody have any experience using the openID standard with django?

plenty of people do :)

and things are already written for it

oh man, that makes my day

why is my google fu so weak lately?

has anyone heard of the Django (v0.96) production server and Firefox being a slow combination on Windows? It's weird, I'm testing at simple project with IE7 and it loads pages nearly instantly while both FF3 and FF2.x take a second to connect to prod. server.

there is no django production server

haha, woops.. just read that

meant development server, sorry

any way to pass request context through to a filter? or otherwise gain access to it from within a filter?

No, only tags can get context

so if i want to have my filters behavior depend on the logged in user, i'll have to do soemthing like pass the users name as a param? and then the filter can just look up that user??

Sure, you can give filters arguments, so you could pass user to the filter

is 12 requests per second sounds good for devserver?

neanton: i would think so

"good" is pretty subjective though

definitely "adequate" ;-)

i heared about ~500+ rquests in production

so this seems too slow for me ;)

well you can't benchmark runserver...

it's isngle threaded

its for dev

DO NOT worry about its performance

what is 12/sec... 80ms?

schmichael, yes

Magus-, oh, if its not threaded, that i understand why is it so slow

exactly

so don't ever think that performance in runserver will translate to production

benchmark later

ok

sorry to ask what must be such a noobish question, but how do I tell django/mod_python to ignore certain directories where I have PHP apps?

using a <Location> block, same as for media

probably different commands inside it though, for php

might've known you'd be here to answer, Magus- :)

thanks

is there a way to put newlines in a url regex for readability?

daaku: probably not, unless you do something like 'part of it' + \ <newline> 'other part'

('part' 'another part' \n 'yet another part')

you can just do a newline for a string? O.o

indeed, implicit +

As long as it's in parens

anyone done anything with "nameless users" using contrib.auth? I'd like to create a user and log them in automatically when certain operations are undertaken, then they'd have the option of finishing the registration later.

!paste

http://dpaste.com/60935/ What silly thing am I missing here. I keep getting told that ContentItem does not contain 'p' or 'e'e

inside of a filter i am running the input through a re.sub which sends each match to a function.... within that function, i'd like to track the number of calls made in a counter variable... any good way to do this?

ugh, that trailing comma makes a difference???

('foo') == string

('foo',) = tuple

ooh, I bet its doing a for ... in ... and if it doesn't get a list it does each letter - which is why it was trying 'p' from 'pub_date' and 'e' from 'enable_comment'

its because ('foo') is a string

but still iterable

Magus-: thanks :)

http://dpaste.com/60936/ what's wrong with my __init__?

do I need to change the size_x and size_y to the same as the original definitions?

meaning x_dimension and y_dimension?

your __init__ doesn't have a self parameter

That's one problem.

There's also the fact that there are a bunch of non-nullable fields there which aren't being set in your __init__ and which can't be passed into it at all.

so just add that as one more parameter, or add it as self.size_x, etc?

Which means that, e.g., the admin interface will never work.

irish: perhaps you should try a Python tutorial ;)

irish: its almost always a bad idea to touch __init__ on a model

that makes sense

(unless you're quite sure of what you're doing)

hence 'almost always' :)

(and even then, proceed with caution)

there's another way to do it afaik

I'm definitely not quite sure

heehee, I wouldn't be asking questions

not to mention the fact that even if it was ok, your function wouldn't even do anything :)

I'm definitely open to other ways

you never save the new models

but i've been up for a few days and can't really tell anymore

I am going through ubernostrum's practical django projects and I have created a simple cms, search app, and templates. if I want to add an index view that lists all the pages in the database, what would be a good location to place it? create another app?

ehc: why would you make an app for an index page?

index sounds like it fits right in the cms app

Magus-, I am not sure where to place it ,that's my question

Indeed.

the logical place

like the cms

since its listing cms pages

pretty clear fit there :)

Magus-, the book's cms is set up as a project with flatpages. so as a project it doesn't have a specific model and view, right?

ehc: for now, put it in the same views file as the search function.

ehc: later on when you learn about generic views (IIRC, Chapter 4) you'll see how you could do it without writing a view at all, just by adding to the project's root URL configuration.

ubernostrum, okay

okay, so I have a table full of columns that are figures, and I want to create a view that will allow me to easily present a table by sorting through those fields

ubernostrum, thanks, that makes sense to use the root url conf.

what would be the best way of doing this, rather than writing tons of if filtername == "population": blahblah etc etc

I am using ModelForm and I keep getting "Attribute: 'str' object has no attribute '_default_manager'

anyone know what this is regarding?

sounds like you're using a string where it wants a model, somewhere

the thing is that it is preventing the server from starting up

no view code is running

it errors as runserver starts

so stop using a string where it wants a model

weird i moved the ModelForm out of models.py into it's own forms.py and the problem went away

were you defining the form above the model and quoting the name?

that doesn't work for a form, only relations, if so

i defined ModelForm just underneath the model and referencing it as an object

can someone explain why this is so: 'list' object has no attribute 'order_by' | stats = get_list_or_404(CityStats, country=countryid, snapshot=period).order_by('city__name')

because it's get_list_or_404

it does not return a queryset

god dang it

is there a get_queryset_or_404

or something that 404s if query set is empty?

no

http://dpaste.com/60946/ <--- the url for my form goes to "" instead of /django/wiki/MyArticleOne/graph/slugname/ any ideas?

well that's err ... interesting

Qayos: well you have no regex match in the graph_name param, of course

graph_view_slug.html is manually inserted as the result of a template filter

so it gets nothing

nor can anything be put there

you're also missing a $ after it

derr

thanks

I thought it was said 'duh'

Kamu: it would be very easy to write your own helper to get a qs or 404 though

Magus-: which i am doing at the moment ;)

seem weird that it is absent

maybe because it would have to hit the database..

uh, it has to anyway

its probably just an old bit of code that nobody's updated

I'd file a ticket for it if there isn't one already

but i mean in order for it to check if it is empty, it would have to hit the database

rather than being able to chain the queries (?)

I will search the tickets now

I will not be able to offer a decent patch though

Kamu: http://code.djangoproject.com/browser/django/tr...

rozwell: I have it open at the moment and staring at the same bit of code

Kamu: remove the list() from line 59 and on line 60 replace with- if not obj_list.count():

genius

Kamu: it has to hit the db to find out if its empty /no matter what/

you could do it with a count() instead of just 'if not' though

if count()==0, surely?

yes

bingo! and she works!

I don't suppose this is already a ticket?

thanks Magus-, rozwell

hi, all

anyone install postgresql on OS x?

I can't seem to get a working environmetn for Django up an running

well, ok then... lol

I'll try Django some other time, ASP.NET is imperfect, but it's easy to install

Can you even run ASP.NET on OSX :/

well that was an idiotic statement

you should say PHP is so much easier to set up instead

(jeff's I mean)

as if its django's fault he can't install postgres

regardless SQLite is better for development IMO

if i want to extend a django app but keep things organized, so i want to make a graph_models.py, what is the best method to accomplish this? just toss an import graph_models.py at the start of models.py?

no...

importing a module won't magically put the classes in that module in scope :)

from graph_models import *

and models still have some finicky things that need set sometimes if you split models

app_label in the Meta inner class may need set to the app name

but that might only be if you make a models dir

so its looking like i should just dump it all in the models.py?

...no

that's not what I said at all

Qayos: since it's your own extension, why do you feel the need to import it into the existing models file, anyway?

it logically fits as a new sub-part of the existing app

i'd like to just add a "graph_models.py" but it is not sounding like anyone here is certain what i'll need to avoid any problems with doing this, and i can find nothing in the docs i've searched

I just told you

the only possible issue is you might have to set app_label

i didnt think you were sure that it was required, and that it was the only thing... you seemed to indicate a plural 'things' which may cause issues, so i was reluctant

the other thing you already knew - importing them into the models module

ok, thanks, i'll be much happier with this separation of files

http://pastebin.ca/1063613 <-- How would I rewrite this to avoid creating a blank list and appending to it?

s = ", ".join(c.name for c in Company.objects.filter(users_username__contains=request.user)); if not s: s = "N/A"

Alex_Gaynor: thank you

Obviously you'll want to format that in a more python way :P

yes. :)

i sometimes wish python supported brackets and semicolons

Oh god no, I can't stand writing JS for prolonged periods for time for just that reason

Qayos: open a Python interpreter.

Qayos: type

from __future__ import braces

:)

Or, you know, just use the block delimiter support.

(which also works for arbitrary comment syntax)

sometimes its useful, it presents a better organization or method of communicating intent

some people have used an braceful encoding

sometimes a thing will easilly fit on one line if you have block delimiters and such....

braces are good for mostly non-crippled lambdas

Qayos: yes, will fit, but is it clear?

sometimes yes, sometimes no

Gee, this is fun.

when yes, and it is easier to communicate like that, i wish python supported it as an option

Because, you know, nobody's ever had this discussion before in the entire history of the Python language.

And I'm sure there will be lots of brand-new, never-before-heard arguments brought up.

the answer you seek is that mostly theres no use. python is abbout the culture, so discouraging bad practices is right on

Python uses whitespace as a block delimiter. Always has, always will.

also that. dogma goes a long way

Indeed.

I don't care if somebody likes it or doesn't.

But if you don't, don't waste my time complaining about it when you could just use another language.

i wasnt expecting some sort of spanish inquisition.... just saying... sometimes i wish it supported it

nobody expects it, its okay

And sometimes I wish Google would buy my blog out for a hundred million dollars.

hundred billion perhaps?

You want to put your whole app on a single line of code? Go use Ruby.

or go all the way and use perl

out many weapons include: "straw men, ...."

*our

Nah, Perl people actually tend to have style guides.

hahaha!

doesnt discount the language ability

Ruby people feel that such things would cramp their style.

The Perl interpreter has scary fucking black magic in it.

elaborate please

Some of it's useful black magic, but still.

Of course, Python's got some of that too.

Look at stuff like Python's sorting code ;)

type -> type

omg the circularity

^-- Tim makes sorting work so you don't have to.

tim makes batteries

is there a 'profiler' app/middleware for django? where it shows the number of queries, time they took, what they were etc?

http://www.djangosnippets.org/snippets/93/ <-- like this, you mean?

There's more complex stuff out there too, but that one covers what you just asked for.

ah yes, that is it, thanks

I was just wondering if there was something you plugged in and it concatted it to every template etc

but this will do nicely

Well, you follow the instructions there.

And you put that code in your base template that everything else extends.

Et voila!

looks like i have to shake up my code a bit seeing as I don't use RequestContext

"return render_to_response('main.html',{'site_title': 'simple unicode string'})" have error "Non-ASCII character '\xd0'" how to solute it?

amigo: stop handing it non-ascii chars?

is that a literal unicode string?

if so, mark it as such... use u'' not just ''

FunkyBob, i'm sorry. return render_to_response('main.html',{'site_title': u'Привет'}) it's not work :(

What version of django are you using?

amigo: can you pastebin the full error?

Django version 0.96.2

ah

need svn?

svn is a lot cleaner when it comes to unicode

There is no formal support for Unicode in .96

ok thanks, peoples

hello everybody, any idea how to useunordered parameters in the url?

can i paginate the results of a custom sql query?

i mean, does django provide a paginator for that

tuirq: the paginator is somewhat abstracted...

is_null: parse them yourself

aw

i could do this without custom sql if i could just use the "SELECT DISTINCT ON (field1, field2, .., fieldN)" feature of postgres

then use the regular paginators

oh dang my django skills suck

tuirq: what is the query?

my database is being hit with 14 queries (7 queries are duplicates of the other 7)

Kamu: and?

isn't that bad?

depends

Kamu: but what's _causing_ those queries?

'Entries' object has no attribute 'get'

O_o

GetEntry = Entries.objects.get(id=id)

O_o

why it doesn't work? O-o

FunkyBob: I am amafraid to show you my code for fair of mockery!

FunkyBob: it's a complicated query that joins some table A to a table B of prefixes, using a "DISTINCT ON ()" clause to return the match in table B with the longest prefix

Kamu: then how can we help? though my guess is a judiciously placed "select_related" will help

FunkyBob: I was kidding, I updated the paste http://pastie.org/private/rchupp5bm6qrvzvisnaq

tuirq: gah... with all this talk of prefixes and longest matches, I'm starting to feel like we're talking data compression :P

FunkyBob: hehe

the template displays pretty much all fields

FunkyBob: like i said though, it could be done with the ORM if i could just insert that "DISTINCT ON ()" to the query

then i could benefit from the pagination magic

Kamu: why do you have so many sets when you only appear to care about a single value?

at the time it seemed like a good idea to split those fields into 3 seperate tables

different related stats..

hmm

if you had a latest_FOO for each as a fkey, I think a select_related() would kill a lot of those extra queries...

however

a manager on each model would also help... one that returned only snapshot=latest records

yes it would..

latest_FOO as a fkey?