问Django 1.6:如何将值从下拉列表传递到另一个模板页面

EN

  <div class="form-group">
        <form action="/doclistings/" method="post">
        <select class="form-control" id="select">
          <option><b>Choose a Speciality...</b></option>
          <option value ="Dermatologist">Dermatologist</option>
          <option value = "Dentist">Dentist</option>
          <option value = "ENT">Ear, Nose and Throat (ENT)</option>
          <option value = "Opthalmologist">Eye Doctor</option>
          <option value = "Psychiatrist">Psychiatrist</option>
          <option value = "Orthopedist">Orthopedist</option>
        </select>
        <span class="input-group-btn">
          <button class="btn btn-primary" type="submit"  name="submit" id="ss-submit">Find Doctors</button>
        </span>
      </div>

{% for doc in doclist %}
            {% if doc.specialization == } # value from the last page
            <div class = "doctorrow">
            <h2><a href="/docprofile/{{doc.id}}/">{{doc.name}}</a></h2>
            <h3> {{doc.specialization}}</h3>           
            </div>
            </div>
       {% endfor %}

def index(request):

if request.method == "POST":
    form = DropdownSelectionForm(request.POST)

    if form.is_valid():
        selection = form.cleaned_data['value']

        return HttpResponseRedirect('/doclistings')
else:
    form = DropdownSelectionForm()

return render(request, 'meddy1/index.html')

@csrf_exempt
def doclistings(request):
    return render(request, 'meddy1/doclistings.html', {'doclist': Doctor.objects.all()})

class DropdownSelectionForm(forms.Form): 
    selection = forms.CharField()