#django

putting something in context based on it

tga: what is CODE?

it's a code for what?

the PK for an object usually

that all subsequent views use

example.com/companies/1/home, /edit, /etc

ah, in that case i'd actually just do it in the view

it's one line per view. that's fine.

more like example.com/companies/1/sub-section/do/somethin...

pass the arg to your view via the urlpattern, then pass it on to the template

and sometimes /companies/1/department/2/equipment/3/edit

with a company layout, a department layout, and a detail layout

each expecting the object in context

so in this case all views under /companies/ need to retrieve a company by company_pk, and all views under /department/ need to retrieve the company and department

so I'm trying to write my first class based views and I'm getting an error I don't really understand... what am I doing wrong here? https://gist.github.com/Flobin/99bb92ad12a5b51a... (views, urls, models, and template are also on that page)

helper function? base class? decorator?

flobin: your categories url pattern is commented out

but should that even matter if I'm not trying to access that url?

flobin: you are trying to resolve an url that doesn't exist (because it's commented)

but how am I trying to resolve it, I mean?

flobin: anything relevant in base.html?

you don't have that one in here

ohh

there is {% block categories %} {% endblock categories %} for which there is a template

oh and <a href="{% url 'categories' %}">Categories</a> | <a href="{% url 'cities' %}">Cities</a>

the error says articles.html, error at line 0, and line 0 is the import for base.html

bingo

ah yeah

thanks tga

np

tga: helper function, if you ask me

tga: if the view needs a company pk, that fact should be part of the view's definition

the fact that the view is accessed under /companies/ is just a coincidence

hi guys, anybody could help a newbie ?

what's your question, robomedia

it's quite hard to explain shortly but i'll try

i have a db model with text field

and in ORM i need to query it like it was an int

example : http://pastebin.com/7ufq3H5U

sorry I know it's a long one, but in short I guess I'm looking for a way to cast a charfield to int so i can use __gt in filter

why do you want it to be a CharField though?

well i want a field to keep any kind of value

it's an 'attribute' of any kind

any type

so it's basically text

the thing that confuses me is that how that SQL statement is made

if you take a look into the link I pasted

__gt doesn’t work currently?

it looks like Django is creating pretty much correct SQL

I don't think I really understand to be honest

have you read the pastebin link ?

ok so if I have a charfield with value 2000

and some others with i.e. 1000

robomedia: https://docs.djangoproject.com/en/1.9/howto/cus... possibly it’s what you’re looking for

when I make .filter(field__gt=2000) it will not return proper set

but SQL from .query will ...

when I change data type to int it will work correctly

ok thx fractalized I will check that out

sorry i’ve missed that __gt produces correct query

robomedia: http://stackoverflow.com/questions/28101580/how...

right but doc's say not to use 'extra' anymore

I was hoping to avoid 'last resort' :)

moldy: alright, so you're saying independent views, thanks

and I guess context processor for things like /COUNTRY/foo app-wide

robomedia: try to use “annotate” instead, as described in docs

ok thx I will play with it

hmm, context processors get access to the request, but not to url params?

that's kind of a problem, if I have a global url param like <country>, all views must either take a country param or **kwars

**kwargs rather

I don't expect a context processor could remove that param somehow?

hmm middleware, right?

ok so my current question is: urls are like /COUNTRY/all_other_views -- based on COUNTRY, I want to get an object from the database and put it in request (then I'll put it in context with a processor)

is this middleware?

in my template i have something like {{ if title.publisher }}{{title.publisher}}{% endif %} and then a similar line on the next line

is there a way to remove that newline if one or the other is false

so i don't end up with blank lines

I don't think you should care that much about white space in generated html

unless it causes actual problems

sometimes it causes actual problems though

it's not html

it's something else

i'm using the template engine to write business files too

and it probably doesn't matter either in the files i'm sending but

mekhami: I can't think of much beyond sticking it all in a template tag but if you have other things with the same behaviour that could get awkward pretty fast

it might bother my business partners' needs

i thought about doing it all on the same line and putting newline characters inside the {% if %} statements

but that's a real ugly template

ah wait

this is a neat little trick

I guess what you'd really need is new lines inside template tags

let me show you

because you are actually adding a new line that the template has to honour

you put the preceding newline inside the if statement

cute little solution

well that's almost not ugly I guess :P

better than jimmying template tags!

=P

possibly better solution: http://jinja.pocoo.org/docs/dev/templates/#whit...

the django template language is pretty braindead and will only take you so far

(by design)

if I have a URL like this: url(r'category/(?P<pk>\d+)', CategoryView.as_view(), name='category'), how do I get the pk into the class based view so I can filter the queryset with it?

I tried queryset = Article.objects.filter(categories=pk)

but I get NameError: name 'pk' is not defined

self.kwargs['pk'] i think

I now get NameError: name 'self' is not defined

ok you need to learn python first before trying django :-p

this is my views.py https://gist.github.com/Flobin/99bb92ad12a5b51a...

you need to override the get_queryset() method of the class

Jon_R I do know some Python but could probably do with more knowledge

def get_queryset(self): return Article.objects.filter(categories=self.kwargs['pk'])

Jon_R oh I thought setting the queryset explicitly did that

maybe but if you want it to be dynamic rather than a static value you'll need to use the method

oh you're right, I just saw this https://docs.djangoproject.com/en/1.9/topics/cl...

my project contains a function that was copy-pasted from a django core function (as I required part of it I couldnt properly monkeypatch).. how does that work in terms of licensing?

does that mean I need to include the BSD license and copyright notice?

how big was the thing you copied?

in theory I think the answer is yes, if you copy any BSD code you have to include the license

Jon_R: ~20 lines

tga: right, that's what I thought

it's just BSD, drop https://github.com/django/django/blob/master/LI... somewhere and you're done

and don't try it with GPL :)

:P