title: How to receive user input from FilteredSelectMultiple widget?
body: <p>I am trying to create form using FilteredSelectMultiple widget. I managed to get it showing on my page, but faced difficulties receiving user input from it. For now, after I click <code>submit</code> button page just refresh and shows same form again instead of going to designated page. What I am doing wrong?</p>
  
  <p>My code so far:</p>
  
  <p>forms.py</p>
  
  <pre><code>class DrgSkaiciuokle(forms.Form):
      drg_pasirinkimas = forms.ModelMultipleChoiceField(queryset=DRGkodas.objects.all(),
                                                        label="Pasirinkite atvejį sudarančius DRG",
                                                        widget=FilteredSelectMultiple("DRG kodai", is_stacked=False),
                                                        required=True)
  
      class Media:
          css = {
              'all': ('/static/admin/css/widgets.css',),
          }
          js = ('/admin/jsi18n',)
  
      #I have no idea if this part is right:
      def clean_drg_pasirinkimas(self):
          drg_pasirinkimas = self.cleaned_data['drg_pasirinkimas']
          return drg_pasirinkimas
  </code></pre>
  
  <p>views.py</p>
  
  <pre><code>def DRG_skaiciuokle(request):
      if request.method == 'POST':
          form = DrgSkaiciuokle(request.POST)
          pasirinkti_DRG = form.cleaned_data['drg_pasirinkimas']
  
          context = {
              'pasirinktiDRG': pasirinktiDRG,
              }
          #This page should be opened after submitting form instead of refresh    
          return render(request, 'DRGskaiciuokle_valid.html', context)
  
      else:
          form = DrgSkaiciuokle()
      context = {
          'form': form,
      }
      return render(request, 'DRGskaiciuokle.html', context) 
  </code></pre>
  
  <p>my html file:</p>
  
  <pre><code>{% extends "base_generic.html" %}
  
  {% block content %}
  &lt;div id='frame'&gt;
      &lt;div id='sk_head'&gt;
          &lt;h3&gt;Kaštų konvertavimo skaičiuoklė&lt;/h3&gt;
          &lt;h4&gt;Pagal DRG metodiką&lt;/h4&gt;
      &lt;/div&gt;
      &lt;form&gt;
          &lt;div id='sk_body'&gt;
              &lt;fieldset&gt;
              &lt;legend&gt;Įveskite duomenis&lt;/legend&gt;      
                  &lt;form action="" method="post"&gt;
                      {% csrf_token %}
                      &lt;table&gt;
                          {{ form.media }}
                          {{ form.as_table }}
                          &lt;script type="text/javascript" src="{% url 'jsi18n' %}"&gt;&lt;/script&gt;
                      &lt;/table&gt;
                          &lt;input type="submit" value="Skaičiuoti"&gt;
                  &lt;/form&gt;
              &lt;/fieldset&gt;
          &lt;/div&gt;
      &lt;/form&gt;
  &lt;/div&gt;
  {% endblock %}
  </code></pre>