问题
I'm trying to reverse a named URL and include a querystring in it. Basically, I've modified the login function, and I want to send ?next=
in it.
Here's what I'm doing now: reverse(name) + "?next=" + reverse(redirect)
Here's what I'd like to do: reverse(name, kwargs = { 'next':reverse(redirect) } )
My URL for the login page (just as an example) looks like this:
url(r'^login/', custom_login, name = 'login'),
So how do I modify this whole thing (or call it) to include the next without having to concatenate it? It feels like an iffy solution at best.
回答1:
You can't capture GET parameters in the url confs, so your method is correct.
I generally prefer string formatting but it's the same thing."%s?next=%s" % (reverse(name), reverse(redirect))
http://docs.djangoproject.com/en/dev/topics/http/urls/#what-the-urlconf-searches-against
The URLconf searches against the requested URL, as a normal Python string. This does not include GET or POST parameters, or the domain name.
回答2:
I just made my own utility function like the one asked in the question:
from django.utils.http import urlencode
def my_reverse(viewname, kwargs=None, query_kwargs=None):
"""
Custom reverse to add a query string after the url
Example usage:
url = my_reverse('my_test_url', kwargs={'pk': object.id}, query_kwargs={'next': reverse('home')})
"""
url = reverse(viewname, kwargs=kwargs)
if query_kwargs:
return u'%s?%s' % (url, urlencode(query_kwargs))
return url
回答3:
I think it's better to wrap Django's reverse method to expose this API. Here's some simple code to do it:
from django.core.urlresolvers import reverse as django_reverse
def reverse(viewname, urlconf=None, args=None, kwargs=None, prefix=None, current_app=None):
"""
Wrapper of django.core.urlresolvers.reverse that attaches arguments in kwargs as query string parameters
"""
if kwargs:
return '%s?%s' % (django_reverse(viewname, urlconf, args, None, prefix, current_app), \
'&'.join(['%s=%s' % (k,v) for k,v in kwargs.items()]))
else:
return django_reverse(viewname, urlconf, args, kwargs, prefix, current_app)
Put this code into some utility or common app that only depends on Django, then instead of importing django.core.urlresolvers.reverse just import myproject.myutils.urlresolvers.reverse
回答4:
I was troubled with the same question and found this link. Apparently, your solution isn't bad designed at all. According to the ticket discussion Django won't provide this functionality.
You could use urlobject or furl.
The other way, is to use your own function to do this, in a much more cleaner way. Here's the one stated in the discussion
from django.utils.http import urlencode
from django.core.urlresolvers import reverse as original_reverse
def reverse(*args, **kwargs):
get = kwargs.pop('get', {})
url = original_reverse(*args, **kwargs)
if get:
url += '?' + urlencode(get)
return url
In the question's case, it can be used the following way
from [myfunctions] import reverse
...
reverse('login', get={next: reverse(redirect)})
回答5:
To keep the query optional, you can wrap Django's reverse function with your own function that also handles the query, allowing for other proper handling of the reverse function.
Creating a Proper Request - Note that the query_kwargs
is optional, so you don't have to send it
# from a views in views.py
def sendingView(request, truckID, fleetSlug):
#in the GET or POST
return HttpResponseRedirect(reverse('subAppName:urlViewName',
kwargs={'anyPassedKawrgs':goHere,…},
query_kwargs={'queries': goHere}
))
# from a template in specificTemplate.html
<a class="nav-link" href="{% url 'subAppName:urlViewName' kwarg1=kwarg1 kwarg2=kwarg2 … query_kwargs={'dict':here} %}">Link</a>
#from a model in models.py
class Truck(models.Model):
name = models.CharField(…)
def get_absolute_wi_url(self):
return reverse('subAppName:urlViewName', kwargs={'kwarg1':kwarg1,'kwarg2':kwarg2})
In utils.py
file (based on docs) for (1.11 and up?)
-myMainApp
-apps
-static
...
-utils
-__init__.py
-utils.py
from django.core.urlresolvers import reverse as django_reverse
def reverse(viewname, urlconf=None, args=None, kwargs=None, current_app=None, query_kwargs=None):
"""
Wrapper of django.core.urlresolvers.reverse that attaches arguments in kwargs as query string parameters
"""
if query_kwargs:
return '%s?%s' % (django_reverse(viewname, urlconf, args, kwargs, current_app), \
'&'.join(['%s=%s' % (k,v) for k,v in query_kwargs.items()]))
else:
return django_reverse(viewname, urlconf, args, kwargs, current_app)
In the urls conf urls.py
app_name = 'subAppName'
urlpatterns = [
url(r'^(?P<kawrg1>[a-zA-Z0-9]+)/(?P<kawrg2>[a-zA-Z0-9]+)/path/to/here/$', views.urlViewFunctionName, name='urlViewName'),
And gaining access to the query
#in a view
def urlViewFunctionName(request, kwarg1, kwarg2):
if request.GET.get('submittedData'):
submittedQuery = request.GET.get('submittedData')
else:
submittedQuery = None
return render(request, 'trucks/weeklyInspectionSuccess.html', {
'truck': truck,
'submittedQuery': submittedQuery
})
#in a template
<div class="container">
Success for {{kwarg1}}
{{submittedQuery}}
</div>
来源:https://stackoverflow.com/questions/4995279/including-a-querystring-in-a-django-core-urlresolvers-reverse-call