mirror of
https://github.com/encode/django-rest-framework.git
synced 2024-09-21 19:39:01 +03:00
56 lines
2.4 KiB
Markdown
56 lines
2.4 KiB
Markdown
source: reverse.py
|
|
|
|
# Returning URLs
|
|
|
|
> The central feature that distinguishes the REST architectural style from other network-based styles is its emphasis on a uniform interface between components.
|
|
>
|
|
> — Roy Fielding, [Architectural Styles and the Design of Network-based Software Architectures][cite]
|
|
|
|
As a rule, it's probably better practice to return absolute URIs from your Web APIs, such as `http://example.com/foobar`, rather than returning relative URIs, such as `/foobar`.
|
|
|
|
The advantages of doing so are:
|
|
|
|
* It's more explicit.
|
|
* It leaves less work for your API clients.
|
|
* There's no ambiguity about the meaning of the string when it's found in representations such as JSON that do not have a native URI type.
|
|
* It makes it easy to do things like markup HTML representations with hyperlinks.
|
|
|
|
REST framework provides two utility functions to make it more simple to return absolute URIs from your Web API.
|
|
|
|
There's no requirement for you to use them, but if you do then the self-describing API will be able to automatically hyperlink its output for you, which makes browsing the API much easier.
|
|
|
|
## reverse
|
|
|
|
**Signature:** `reverse(viewname, *args, **kwargs)`
|
|
|
|
Has the same behavior as [`django.core.urlresolvers.reverse`][reverse], except that it returns a fully qualified URL, using the request to determine the host and port.
|
|
|
|
You should **include the request as a keyword argument** to the function, for example:
|
|
|
|
from rest_framework.reverse import reverse
|
|
from rest_framework.views import APIView
|
|
from django.utils.timezone import now
|
|
|
|
class APIRootView(APIView):
|
|
def get(self, request):
|
|
year = now().year
|
|
data = {
|
|
...
|
|
'year-summary-url': reverse('year-summary', args=[year], request=request)
|
|
}
|
|
return Response(data)
|
|
|
|
## reverse_lazy
|
|
|
|
**Signature:** `reverse_lazy(viewname, *args, **kwargs)`
|
|
|
|
Has the same behavior as [`django.core.urlresolvers.reverse_lazy`][reverse-lazy], except that it returns a fully qualified URL, using the request to determine the host and port.
|
|
|
|
As with the `reverse` function, you should **include the request as a keyword argument** to the function, for example:
|
|
|
|
api_root = reverse_lazy('api-root', request=request)
|
|
|
|
[cite]: http://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arch_style.htm#sec_5_1_5
|
|
[reverse]: https://docs.djangoproject.com/en/dev/topics/http/urls/#reverse
|
|
[reverse-lazy]: https://docs.djangoproject.com/en/dev/topics/http/urls/#reverse-lazy
|