Re: Passing optional URL params to reverse() function

[nabucosound]

Hi Malcolm,

Thanks for your answer. Somehow I had a shortcircuit in my brain
yerterday that made me try to do an impossible upon the framework,
that is, using the same GET response with the same URL after an HTTP
redirect, rendering extra information if extra params in the URLconf
url were given. I finally realized that this was just impossible --
the one and only ways to pass info into an HTTP request is via GET or
POST params, or extra HEADers -- but anyway I am a passionate spirit
and sometimes I am blinded.

H.

On Aug 11, 3:41 am, Malcolm Tredinnick 
wrote:
> On Mon, 2009-08-10 at 11:28 -0700, nabucosound wrote:
> > Hi all:
>
> > I have a URLconf url entry like this:
>
> > url(
> >         regex=r'^(?P\w+)/(?P[-\w]+)/$',
> >         view='show_post',
> >         name='show_post',
> >         kwargs={'msg': None},
> >     ),
>
> > and I want to call it with HttpResponseRedirect and reverse():
>
> > filters = {'category': post.category.name, 'slug': post.slug}
> > return HttpResponseRedirect(reverse('show_post', kwargs=filters))
>
> > but I am getting this error:
>
> > NoReverseMatch at /commentposted/first-post/
>
> > Reverse for 'show_post' with arguments '()' and keyword arguments
> > '{'category': u'django', 'msg': 'Your comment has been posted',
> > 'slug': u'first-post'}' not found.
>
> [...]
>
> > Is there any way to pass th reverse() function extra optional
> > parameters that the url define? Or am I crazy?
>
> No, you can't do that. By the way, the extra arguments you are passing
> in aren't *optional* -- they are simply not required. There is not
> situation in which they will be used to construct the URL.
>
> You can only pass in parameters that are present in the URL pattern.
> There are a bunch of technical reasons for this (including handling
> optional arguments and precise error reporting), so it's not an
> arbitrary decision.
>
> Regards,
> Malcolm
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Re: Passing optional URL params to reverse() function

[Malcolm Tredinnick]

On Mon, 2009-08-10 at 11:28 -0700, nabucosound wrote:
> Hi all:
> 
> I have a URLconf url entry like this:
> 
> 
> url(
> regex=r'^(?P\w+)/(?P[-\w]+)/$',
> view='show_post',
> name='show_post',
> kwargs={'msg': None},
> ),
> 
> 
> and I want to call it with HttpResponseRedirect and reverse():
> 
> 
> filters = {'category': post.category.name, 'slug': post.slug}
> return HttpResponseRedirect(reverse('show_post', kwargs=filters))
> 
> 
> but I am getting this error:
> 
> 
> NoReverseMatch at /commentposted/first-post/
> 
> Reverse for 'show_post' with arguments '()' and keyword arguments
> '{'category': u'django', 'msg': 'Your comment has been posted',
> 'slug': u'first-post'}' not found.
> 

[...]
> Is there any way to pass th reverse() function extra optional
> parameters that the url define? Or am I crazy?

No, you can't do that. By the way, the extra arguments you are passing
in aren't *optional* -- they are simply not required. There is not
situation in which they will be used to construct the URL.

You can only pass in parameters that are present in the URL pattern.
There are a bunch of technical reasons for this (including handling
optional arguments and precise error reporting), so it's not an
arbitrary decision.

Regards,
Malcolm



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Passing optional URL params to reverse() function

[nabucosound]

Hi all:

I have a URLconf url entry like this:

url(
regex=r'^(?P\w+)/(?P[-\w]+)/$',
view='show_post',
name='show_post',
kwargs={'msg': None},
),

and I want to call it with HttpResponseRedirect and reverse():

filters = {'category': post.category.name, 'slug': post.slug, 'msg':
msg}
return HttpResponseRedirect(reverse('show_post', kwargs=filters))

but I am getting this error:

NoReverseMatch at /commentposted/first-post/

Reverse for 'show_post' with arguments '()' and keyword arguments
'{'category': u'django', 'msg': 'Your comment has been posted',
'slug': u'first-post'}' not found.

Request Method: GET
Request URL:http://localhost:8000/commentposted/first-post/?c=8
Exception Type: NoReverseMatch
Exception Value:

Reverse for 'show_post' with arguments '()' and keyword arguments
'{'category': u'django', 'msg': 'Your comment has been posted',
'slug': u'first-post'}' not found.

Is there any way to pass th reverse() function extra optional
parameters that the url define (msg param in this case)? Or am I
crazy?

Thanks in advance!

Hector
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Passing optional URL params to reverse() function

[nabucosound]

Hi all:

I have a URLconf url entry like this:


url(
regex=r'^(?P\w+)/(?P[-\w]+)/$',
view='show_post',
name='show_post',
kwargs={'msg': None},
),


and I want to call it with HttpResponseRedirect and reverse():


filters = {'category': post.category.name, 'slug': post.slug}
return HttpResponseRedirect(reverse('show_post', kwargs=filters))


but I am getting this error:


NoReverseMatch at /commentposted/first-post/

Reverse for 'show_post' with arguments '()' and keyword arguments
'{'category': u'django', 'msg': 'Your comment has been posted',
'slug': u'first-post'}' not found.

Request Method: GET
Request URL:http://localhost:8000/commentposted/first-post/?c=8
Exception Type: NoReverseMatch
Exception Value:

Reverse for 'show_post' with arguments '()' and keyword arguments
'{'category': u'django', 'msg': 'Your comment has been posted',
'slug': u'first-post'}' not found.


Is there any way to pass th reverse() function extra optional
parameters that the url define? Or am I crazy?

Thanks in advance!

Hector
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