Support lazy redirect_to in HttpResponseRedirectBase

[German M. Bravo]

HttpResponseRedirect(reverse_lazy('name')) fails when this object is initialized because the reverse_lazy is immediately forced to text. In some use cases it would be desirable for the object to be created and the lazy reverse be done only when it's actually needed.

[Mattia Procopio]

can you add your use case please?

[Rik]

Regardless of the use case, your issue should be able to be solved like this:

from django.core.urlresolvers import reverse
from django.http.response import HttpResponseRedirect
from django.utils.functional import SimpleLazyObject

def weird_usecase():
    return SimpleLazyObject(lambda: HttpResponseRedirect(reverse('name')))

But unfortunately this doesn't work at the moment because LazyObject (which SimpleLazyObject implements) doesn't implement __iter__. This is required because the BaseHandler of wsgiref loops through response objects, which invokes __iter__, but if since LazyObject doesn't implement __iter__ it falls back to __getitem__ which won't work.

I opened an issue for this:
https://code.djangoproject.com/ticket/23838

I'll make a pull request for the __iter__ method, when that will be merged, the code snipped above will work.

[Tim Graham]

Closing as "needs info" in absence of a use case and/or confirmation that the related ticket won't solve this.