On Wednesday, 1 February 2012 01:34:03 UTC, richard wrote:
>
> Hi i have seen alot of people saying to use a context processor to
> include forms in multiple page. I have written a context processor
> login form that just returns the django Authentication form and
> everything works great including the form.errors etc except that I
> cant seem to redirect from the context processor after is_valid is
> called. Are context processors not supposed ot be used in this way? My
> thoughts inititally were that if it seems to support a request and can
> do the validation why not? Basically stuck on using
> HttpResponseRedirect in a context processor. I have managed to get
> this working by passing a variable called redirect in the dictionary
> returned to my template and then saying if the redirect tag is
> available use the browsers meta tag to redirect me but i dont think
> this is the way it should work. code below please advise thanks.
>
> context_processors.py
>
> from django.contrib.auth.forms import AuthenticationForm
> from django.http import HttpResponseRedirect
>
>
> def login_form(request):
> if request.method == 'POST':
> form = AuthenticationForm(data=request.POST)
> if form.is_valid():
> #return HttpResponseRedirect('/home') ONLY THING THATS NOT
> WORKING
> return {'login_form': form, 'redirect': '/home'}
> else:
> form = AuthenticationForm(request)
> return {'login_form': form}
>
> template.html
> {{ form.non_field_errors}} # works fine after post with errors showing
> {{ form.username}}
> {{ form.password}}
> {% if redirect %}
> <meta http-equiv="REFRESH" content="0;url={{ redirect }}">
> {% endif %}
No, of course this is not what context processors are for. They are for,
er, processing the context. The only thing they can do is add items to the
template context before it is rendered. They have no control at all over
the response - the template that is being rendered may not even be part of
the response (think of an email being created from a template within a
view, but the response is rendered from a separate 'confirmation' template).
Rather than putting the form in a context processor, I would use a template
tag that only renders the original form. The form itself should post to a
specific view, so that the POST is processed there instead of in the
context processor.
--
DR.
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