title: Form's cleaned_data is empty but formset's cleaned_data isnt?
body: <p>I am trying to use the String values from a CharField in each form of a formset, however for some reason the cleaned_data for each form always appeares empty while the formset's cleaned data is not. Here is the code from my views.py:</p>
  
  <pre><code>    TagsFormSet = formset_factory(TagsForm, formset=TagFormSet, extra=applicantQuery.count())
      if request.method == 'POST':
          tags_formset = TagsFormSet(request.POST, request.FILES, prefix='tags', applicants=applicantQuery)
          if tags_formset.is_valid():
              for tagForm in tags_formset.forms:
                  tagForm.saveTags()
  </code></pre>
  
  <p>where my form looks like this:</p>
  
  <pre><code>class TagFormSet(BaseFormSet):
  
  def __init__(self, *args, **kwargs):
      applicants = kwargs.pop('applicants')
      super(TagFormSet, self).__init__(*args, **kwargs)
      #after call to super, self.forms is populated with the forms
  
      #associating first form with first applicant, second form with second applicant and so on
      for index, form in enumerate(self.forms):
          form.applicant = applicants[index]
  
  class TagsForm(forms.Form):
      tags = forms.CharField()
      def __init__(self, *args, **kwargs):
          super(TagsForm, self).__init__(*args, **kwargs)
          self.fields['tags'].required = False;
  
      def saveTags(self):
          Tag.objects.update(self.applicant, self.cleaned_data['tags'])  
  </code></pre>
  
  <p>As I've said before, the tags_formset.cleaned data contains the correct information as entered on the page, however the form's cleaned data is empty. This code gives me a KeyValue error saying 'tags' isn't in the cleaned data as it has nothing in it (error thrown in saveTags function).</p>