Oops! Scratch that, let's try again...
So Django doesn't create a relationship incoming HTTP requests and
applications. You could try to create such a relationship, based on where
URLconfs or views are defined, but you'll quickly discover tons of edge cases —
starting with decorators — that make this unreliable in practice. You'd be
going against Django's #1 design philosophy: loose coupling.
If you have control over the project and you know where the URLconf for the app
is included, you can do: `if request.path.startswith("/your_app/"):
do_stuff()`. If you're building a pluggable app and you don't have control over
the project, you can write a decorator and apply it to every view.
Best regards,
--
Aymeric.
> On 7 Jul 2019, at 21:28, Adam Johnson <m...@adamj.eu> wrote:
>
> Aymeric, are you sure about that? I can't find the code, and the docs for
> current_app say it's noto set by Django itself:
> https://docs.djangoproject.com/en/2.2/ref/request-response/#django.http.HttpRequest.current_app
>
> <https://docs.djangoproject.com/en/2.2/ref/request-response/#django.http.HttpRequest.current_app>
>
> Also middleware can't reliably make use of routing information except in
> process_view, because if another middleware changes request.urlconf, it will
> be "re-routed".
>
> On Sun, 7 Jul 2019 at 19:51, Aymeric Augustin
> <aymeric.augus...@polytechnique.org
> <mailto:aymeric.augus...@polytechnique.org>> wrote:
> Hello Kapil,
>
> When you talk of a "URL served by an app", I suppose you're referring to URL
> namespaces, which provide a request.currrent_app attribute associating an
> HTTP request to an app. As far as I know, this is the only association of a
> request and an app that Django defines.
>
> Django's documentation encourages URL namespaces for all pluggable apps.
> Unfortunately, adoption is limited because the benefits aren't sufficiently
> clear for many users. That said, if you need to add a middleware to an app
> that's under your control, you can give this app a URL namespace. Once you've
> done that, in your middleware, you can run your logic only if the request is
> routed to your app: `if request.current_app == "your_app": do_stuff()`.
>
> As to why this isn't documented, most likely, that's because nobody ever had
> this use case and took the time to submit a documentation patch. That's a
> good contribution opportunity :-)
>
> Best regards,
>
> --
> Aymeric.
>
>
>
>> On 7 Jul 2019, at 17:42, Kapil Garg <kapilgarg1...@gmail.com
>> <mailto:kapilgarg1...@gmail.com>> wrote:
>>
>> Hi, I am working on one django project and recently i had the requirement
>> for a middleware. But i don't want this middleware to hook to every url
>> served by the whole project but instead, only to one of the apps. I tried to
>> look on the internet but everywhere there are hacks to implement it but not
>> a in-built support from django. So i was curious why django doesn't provide
>> support for app specific middleware or if it does then why there isn't any
>> neat documentation about it. Thanks
>>
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> --
> Adam
>
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