cant pass parameter in HttpResponseRedirect
I have read that after successfully dealing with post data, you should use HttpResponseRedirect to redirect to another page. I am building a URL shortener for learning purposes, the code from views.py is shown below: (Not working)
def makeurl(request):
# get url from form
post_url = request.POST['url']
# shorten the url and have the short code returned
shortened_url = shorten_url(post_url)
return HttpResponseRedirect('create')
def create(request):
return render(request, 'shorturl/create.html',
{'shortened_url': shortened_url})
When my form is submitted to shorten the input URL, 'makeurl' is called, where the shortened URL is calculated and returned (shortened_utl). I then call 'create', which will render the page where 'shortened_url needs to be displayed to the user.
The problem is, if i am to use HttpResponseRedirect, i have no way of passing the 'shortened_url' variable to my 'create' view to be rendered. Can anyone advice me with this? Im new to django, cheers
You can pass easily parameters using a redirect in at least three ways:
Let's say your "create" view takes a parameter called "shortened_url". Your URL for that using method 1 would look like:
# urls.py
url(r'create/(?P<shortened_url>.)/$', 'create', name='create',)
# views.py
def create(request, shortened_url):
# do whatever
In your view that handles the form post, you would do:
from django.core.urlresolvers import reverse
def makeurl(request):
. . .
return HttpResponseRedirect(reverse('create', args=(),
kwargs={'shortened_url': shortened_url}))
If it is method 2, you don't need the named parameter in the url pattern at all, can instead just reverse the url pattern and tack on the querystring parameter:
def makeurl(request):
. . .
url = reverse('create')
url += '?shortened_url={}' + shortened_url
return HttpResponseRedirect(url)
If it's method 3, you don't need the named parameter or a querystring value:
def makeurl(request):
. . .
request.session['shortened_url'] = shortened_url
return HttpResponseRedirect(reverse('create'))
def create(request):
shortened_url = request.session.get('shortened_url')
. . .
# delete the session value
try:
del session['shortened_url']
except KeyError:
pass
# do whatever
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