Re: Decoupling Urls

[Smaran Harihar]

Hey Nik,

Thanks for the detailed explanation. It is clear now.

Thanks,
Smaran

On Tue, Jul 3, 2012 at 5:47 PM, Nikolas Stevenson-Molnar <
nik.mol...@consbio.org> wrote:

>  Hi Smaran,
>
> Yes, by full path, I mean, for example, 'polls.urls'. And yes, it is a
> string. Django interprets it as a module path when it builds up the URLs.
> It's the same thing that happens in the polls.urls module when mapping the
> URL patterns to functions. The functions are all quoted as well (in the
> tutorial). In this case, you *don't* need to give the full path, since
> the 'polls.views' part is specified as the first argument of patterns. For
> example, looking at the last code snippet on the page you linked to, you
> could write the URL patterns in a few different ways:
>
> 1) as-is
> 2) with no 'prefix' given:
> urlpatterns = patterns('',
> url(r'^$', 'polls.views.index'),
> ...
> )
>
> 3) with a partial prefix:
> urlpatterns = patterns('polls',
> url(r'^$', 'views.index'),
> ...
> )
>
> 4) by passing in the function itself, rather than a string
> from polls.views import index
> ...
> urlpatterns = patterns('',
> url(r'^$', index),
> ...
> )
>
> This notion of using strings instead of actual references is used
> elsewhere too. For example, if you need to create a ForeignKey field in one
> model that references a model defined later in the same file:
> https://docs.djangoproject.com/en/dev/ref/models/fields/#foreignkey (see
> first ForeignKey code example). It's also used in the settings file (all
> the apps and middleware classes are provided as strings; typically nothing
> is imported in the settings module).
>
> Does that make sense at all? In short, in many places where Django
> requires a function, class, or module, you can provide a direct reference
> to it, or provide a string instead. You'll still get an error if the module
> path in that string is not correct.
>
> _Nik
>
>
> On 7/3/2012 5:14 PM, Smaran Harihar wrote:
>
> Hey Nik,
>
>  Thanks for the reply. When you say, provide full path for the lazy
> quoted version, do you mean 'polls.url' ?
> Is that not relative path?
>
>  Also having the path in quotes 'polls.url', is it not a string?
>
>  Thanks,
> Smaran
>
> On Tue, Jul 3, 2012 at 5:02 PM, Nikolas Stevenson-Molnar <
> nik.mol...@consbio.org> wrote:
>
>>  If I understand correctly, you're asking about the difference between
>> include('polls.urls') and include(admin.site.urls)? Django will often let
>> you reference modules, functions, and classes 'lazily', meaning you don't
>> need to import them first. You could use the unquoted version for polls as
>> well, it would look something like
>>
>> import polls
>> ...
>> url(r'^polls/', include(polls.urls))
>>
>> *or*
>>
>> from polls import urls as poll_urls
>> ...
>> url(r'^polls/', include(poll_urls))
>>
>> Note that if you're using the 'lazy', quoted version you always need to
>> provide the full path.
>>
>> _Nik
>>
>>
>> On 7/3/2012 4:24 PM, Smaran Harihar wrote:
>>
>>  Hi Djangoers,
>>
>>  I just completed the tutorial 3 and got a little confused on the last
>> sectionof
>>  the tutorial,
>>
>>   urlpatterns = patterns('',
>> url(r'^polls/', include('polls.urls')),
>> url(r'^admin/', include(admin.site.urls)),)
>>
>> In this for the polls app, we are assigning the urls.py path in the
>> quotes 'polls.urls'
>> but for admin we are not?
>>
>>  So what is the difference and being it quotes how does it still pick up
>> the path? Does django not consider it to be simply string.
>>
>>  --
>> Thanks & Regards
>> Smaran Harihar
>>
>>   --
>> You received this message because you are subscribed to the Google Groups
>> "Django users" group.
>> To post to this group, send email to django-users@googlegroups.com.
>> To unsubscribe from this group, send email to
>> django-users+unsubscr...@googlegroups.com.
>> For more options, visit this group at
>> http://groups.google.com/group/django-users?hl=en.
>>
>>
>>
>>  --
>> You received this message because you are subscribed to the Google Groups
>> "Django users" group.
>> To post to this group, send email to django-users@googlegroups.com.
>> To unsubscribe from this group, send email to
>> django-users+unsubscr...@googlegroups.com.
>> For more options, visit this group at
>> http://groups.google.com/group/django-users?hl=en.
>>
>
>
>
>  --
> Thanks & Regards
> Smaran Harihar
>
>  --
> You received this message because you are subscribed to the Google Groups
> "Django users" group.
> To post to this group, send email to django-users@googlegroups.com.
> To unsubscribe from this group, send email to
> django-users+unsubscr...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/django-users?hl=en.
>
>
>
>  --
> You received this message because you are subscribed to the Google Groups
> "Django users" group.
> To post to this group, send email to 

Re: Decoupling Urls

[Nikolas Stevenson-Molnar]

Sorry, I missed the second part of your first question. I would consider
'polls.urls' to be a full path from your project root. Depending on your
configuration, it may also be something like 'myproject.polls.urls'.

_Nik

On 7/3/2012 5:14 PM, Smaran Harihar wrote:
> Hey Nik,
>
> Thanks for the reply. When you say, provide full path for the lazy
> quoted version, do you mean 'polls.url' ?
> Is that not relative path?
>
> Also having the path in quotes 'polls.url', is it not a string?
>
> Thanks,
> Smaran
>
> On Tue, Jul 3, 2012 at 5:02 PM, Nikolas Stevenson-Molnar
> > wrote:
>
> If I understand correctly, you're asking about the difference
> between include('polls.urls') and include(admin.site.urls)? Django
> will often let you reference modules, functions, and classes
> 'lazily', meaning you don't need to import them first. You could
> use the unquoted version for polls as well, it would look
> something like
>
> import polls
> ...
> url(r'^polls/', include(polls.urls))
>
> /or/
>
> from polls import urls as poll_urls
> ...
> url(r'^polls/', include(poll_urls))
>
> Note that if you're using the 'lazy', quoted version you always
> need to provide the full path.
>
> _Nik
>
>
> On 7/3/2012 4:24 PM, Smaran Harihar wrote:
>> Hi Djangoers,
>>
>> I just completed the tutorial 3 and got a little confused on the
>> last section
>> 
>> 
>> of the tutorial,
>>
>> urlpatterns = patterns('',
>> url(r'^polls/', include('polls.urls')),
>> url(r'^admin/', include(admin.site.urls)),
>> )
>> In this for the polls app, we are assigning the urls.py path in
>> the quotes 'polls.urls'
>> but for admin we are not?
>>
>> So what is the difference and being it quotes how does it still
>> pick up the path? Does django not consider it to be simply string.
>>
>> -- 
>> Thanks & Regards
>> Smaran Harihar
>>
>> -- 
>> You received this message because you are subscribed to the
>> Google Groups "Django users" group.
>> To post to this group, send email to
>> django-users@googlegroups.com .
>> To unsubscribe from this group, send email to
>> django-users+unsubscr...@googlegroups.com
>> .
>> For more options, visit this group at
>> http://groups.google.com/group/django-users?hl=en.
>
>
> -- 
> You received this message because you are subscribed to the Google
> Groups "Django users" group.
> To post to this group, send email to django-users@googlegroups.com
> .
> To unsubscribe from this group, send email to
> django-users+unsubscr...@googlegroups.com
> .
> For more options, visit this group at
> http://groups.google.com/group/django-users?hl=en.
>
>
>
>
> -- 
> Thanks & Regards
> Smaran Harihar
>
> -- 
> You received this message because you are subscribed to the Google
> Groups "Django users" group.
> To post to this group, send email to django-users@googlegroups.com.
> To unsubscribe from this group, send email to
> django-users+unsubscr...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/django-users?hl=en.


-- 
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To post to this group, send email to django-users@googlegroups.com.
To unsubscribe from this group, send email to 
django-users+unsubscr...@googlegroups.com.
For more options, visit this group at 
http://groups.google.com/group/django-users?hl=en.

Re: Decoupling Urls

[Nikolas Stevenson-Molnar]

Hi Smaran,

Yes, by full path, I mean, for example, 'polls.urls'. And yes, it is a
string. Django interprets it as a module path when it builds up the
URLs. It's the same thing that happens in the polls.urls module when
mapping the URL patterns to functions. The functions are all quoted as
well (in the tutorial). In this case, you /don't/ need to give the full
path, since the 'polls.views' part is specified as the first argument of
patterns. For example, looking at the last code snippet on the page you
linked to, you could write the URL patterns in a few different ways:

1) as-is
2) with no 'prefix' given:
urlpatterns = patterns('',
url(r'^$', 'polls.views.index'),
...
)

3) with a partial prefix:
urlpatterns = patterns('polls',
url(r'^$', 'views.index'),
...
)

4) by passing in the function itself, rather than a string
from polls.views import index
...
urlpatterns = patterns('',
url(r'^$', index),
...
)

This notion of using strings instead of actual references is used
elsewhere too. For example, if you need to create a ForeignKey field in
one model that references a model defined later in the same file:
https://docs.djangoproject.com/en/dev/ref/models/fields/#foreignkey (see
first ForeignKey code example). It's also used in the settings file (all
the apps and middleware classes are provided as strings; typically
nothing is imported in the settings module).

Does that make sense at all? In short, in many places where Django
requires a function, class, or module, you can provide a direct
reference to it, or provide a string instead. You'll still get an error
if the module path in that string is not correct.

_Nik

On 7/3/2012 5:14 PM, Smaran Harihar wrote:
> Hey Nik,
>
> Thanks for the reply. When you say, provide full path for the lazy
> quoted version, do you mean 'polls.url' ?
> Is that not relative path?
>
> Also having the path in quotes 'polls.url', is it not a string?
>
> Thanks,
> Smaran
>
> On Tue, Jul 3, 2012 at 5:02 PM, Nikolas Stevenson-Molnar
> > wrote:
>
> If I understand correctly, you're asking about the difference
> between include('polls.urls') and include(admin.site.urls)? Django
> will often let you reference modules, functions, and classes
> 'lazily', meaning you don't need to import them first. You could
> use the unquoted version for polls as well, it would look
> something like
>
> import polls
> ...
> url(r'^polls/', include(polls.urls))
>
> /or/
>
> from polls import urls as poll_urls
> ...
> url(r'^polls/', include(poll_urls))
>
> Note that if you're using the 'lazy', quoted version you always
> need to provide the full path.
>
> _Nik
>
>
> On 7/3/2012 4:24 PM, Smaran Harihar wrote:
>> Hi Djangoers,
>>
>> I just completed the tutorial 3 and got a little confused on the
>> last section
>> 
>> 
>> of the tutorial,
>>
>> urlpatterns = patterns('',
>> url(r'^polls/', include('polls.urls')),
>> url(r'^admin/', include(admin.site.urls)),
>> )
>> In this for the polls app, we are assigning the urls.py path in
>> the quotes 'polls.urls'
>> but for admin we are not?
>>
>> So what is the difference and being it quotes how does it still
>> pick up the path? Does django not consider it to be simply string.
>>
>> -- 
>> Thanks & Regards
>> Smaran Harihar
>>
>> -- 
>> You received this message because you are subscribed to the
>> Google Groups "Django users" group.
>> To post to this group, send email to
>> django-users@googlegroups.com .
>> To unsubscribe from this group, send email to
>> django-users+unsubscr...@googlegroups.com
>> .
>> For more options, visit this group at
>> http://groups.google.com/group/django-users?hl=en.
>
>
> -- 
> You received this message because you are subscribed to the Google
> Groups "Django users" group.
> To post to this group, send email to django-users@googlegroups.com
> .
> To unsubscribe from this group, send email to
> django-users+unsubscr...@googlegroups.com
> .
> For more options, visit this group at
> http://groups.google.com/group/django-users?hl=en.
>
>
>
>
> -- 
> Thanks & Regards
> Smaran Harihar
>
> -- 
> You received this message because you are subscribed to the Google
> Groups "Django users" group.
> To post to this group, send email to django-users@googlegroups.com.
> To unsubscribe from this group, send email to
> django-users+unsubscr...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/django-users?hl=en.


-- 
You received this message because 

Re: Decoupling Urls

[Smaran Harihar]

Hey Nik,

Thanks for the reply. When you say, provide full path for the lazy quoted
version, do you mean 'polls.url' ?
Is that not relative path?

Also having the path in quotes 'polls.url', is it not a string?

Thanks,
Smaran

On Tue, Jul 3, 2012 at 5:02 PM, Nikolas Stevenson-Molnar <
nik.mol...@consbio.org> wrote:

>  If I understand correctly, you're asking about the difference between
> include('polls.urls') and include(admin.site.urls)? Django will often let
> you reference modules, functions, and classes 'lazily', meaning you don't
> need to import them first. You could use the unquoted version for polls as
> well, it would look something like
>
> import polls
> ...
> url(r'^polls/', include(polls.urls))
>
> *or*
>
> from polls import urls as poll_urls
> ...
> url(r'^polls/', include(poll_urls))
>
> Note that if you're using the 'lazy', quoted version you always need to
> provide the full path.
>
> _Nik
>
>
> On 7/3/2012 4:24 PM, Smaran Harihar wrote:
>
> Hi Djangoers,
>
>  I just completed the tutorial 3 and got a little confused on the last
> sectionof
>  the tutorial,
>
>   urlpatterns = patterns('',
> url(r'^polls/', include('polls.urls')),
> url(r'^admin/', include(admin.site.urls)),)
>
> In this for the polls app, we are assigning the urls.py path in the quotes
> 'polls.urls'
> but for admin we are not?
>
>  So what is the difference and being it quotes how does it still pick up
> the path? Does django not consider it to be simply string.
>
>  --
> Thanks & Regards
> Smaran Harihar
>
>  --
> You received this message because you are subscribed to the Google Groups
> "Django users" group.
> To post to this group, send email to django-users@googlegroups.com.
> To unsubscribe from this group, send email to
> django-users+unsubscr...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/django-users?hl=en.
>
>
>
>  --
> You received this message because you are subscribed to the Google Groups
> "Django users" group.
> To post to this group, send email to django-users@googlegroups.com.
> To unsubscribe from this group, send email to
> django-users+unsubscr...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/django-users?hl=en.
>



-- 
Thanks & Regards
Smaran Harihar

-- 
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To post to this group, send email to django-users@googlegroups.com.
To unsubscribe from this group, send email to 
django-users+unsubscr...@googlegroups.com.
For more options, visit this group at 
http://groups.google.com/group/django-users?hl=en.

Re: Decoupling Urls

[Nikolas Stevenson-Molnar]

If I understand correctly, you're asking about the difference between
include('polls.urls') and include(admin.site.urls)? Django will often
let you reference modules, functions, and classes 'lazily', meaning you
don't need to import them first. You could use the unquoted version for
polls as well, it would look something like

import polls
...
url(r'^polls/', include(polls.urls))

/or/

from polls import urls as poll_urls
...
url(r'^polls/', include(poll_urls))

Note that if you're using the 'lazy', quoted version you always need to
provide the full path.

_Nik

On 7/3/2012 4:24 PM, Smaran Harihar wrote:
> Hi Djangoers,
>
> I just completed the tutorial 3 and got a little confused on the last
> section
> 
> of the tutorial,
>
> urlpatterns = patterns('',
> url(r'^polls/', include('polls.urls')),
> url(r'^admin/', include(admin.site.urls)),
> )
> In this for the polls app, we are assigning the urls.py path in the
> quotes 'polls.urls'
> but for admin we are not?
>
> So what is the difference and being it quotes how does it still pick
> up the path? Does django not consider it to be simply string.
>
> -- 
> Thanks & Regards
> Smaran Harihar
>
> -- 
> You received this message because you are subscribed to the Google
> Groups "Django users" group.
> To post to this group, send email to django-users@googlegroups.com.
> To unsubscribe from this group, send email to
> django-users+unsubscr...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/django-users?hl=en.


-- 
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To post to this group, send email to django-users@googlegroups.com.
To unsubscribe from this group, send email to 
django-users+unsubscr...@googlegroups.com.
For more options, visit this group at 
http://groups.google.com/group/django-users?hl=en.

Decoupling Urls

[Smaran Harihar]

Hi Djangoers,

I just completed the tutorial 3 and got a little confused on the last
sectionof
the tutorial,

urlpatterns = patterns('',
url(r'^polls/', include('polls.urls')),
url(r'^admin/', include(admin.site.urls)),)

In this for the polls app, we are assigning the urls.py path in the quotes
'polls.urls'
but for admin we are not?

So what is the difference and being it quotes how does it still pick up the
path? Does django not consider it to be simply string.

-- 
Thanks & Regards
Smaran Harihar

-- 
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To post to this group, send email to django-users@googlegroups.com.
To unsubscribe from this group, send email to 
django-users+unsubscr...@googlegroups.com.
For more options, visit this group at 
http://groups.google.com/group/django-users?hl=en.