title: Initial value for Formset hidden field
body: <p>I have a problem with the initial value of a hidden field in a modelform deployed in a formset. Just the first form have the initial value in the hidden field and the others are empty.</p>
  
  <p>The modelForm is:</p>
  
  <pre><code>class md_changelogFormModel(forms.ModelForm):
      post_docs = forms.CharField(widget=forms.HiddenInput(),
                                  initial="READY_FOR_RUN")
      # Other fields
  
      class Meta:
          model = md_changelog
          fields = '__all__'
  </code></pre>
  
  <p>The same model md_changelog is used in a form based in BaseInlineFormSet:</p>
  
  <pre><code>class md_changelogForm(BaseInlineFormSet)
  
        class Meta:
              model = md_changelog
              fields = '__all__'
  </code></pre>
  
  <p>And a formset class is created with inlineformset_factory:</p>
  
  <pre><code>md_changelogFormSet = inlineformset_factory(md_orderlog, md_changelog,
                                              form=md_changelogFormModel,
                                              formset=md_changelogForm,
                                              extra=1, max_num=20)
  </code></pre>
  
  <p>And the formset class is instantiated in a class based view:</p>
  
  <pre><code>def get(self, request, *args, **kwargs):
      """
      Handles GET requests and instantiates blank versions of the form
      and its inline formsets.
      """
      self.object = None
      form_class = self.get_form_class()
      form = self.get_form(form_class)
  
      md_changelog_form = md_changelogFormSet(initial=[{'post_docs':'READY_FOR_RUN'}])
  
      return self.render_to_response(
          self.get_context_data(form=form,
                                md_changelog_form=md_changelog_form))
  </code></pre>
  
  <p>The problem is that when the post function receives the request.POST, only the post_docs hidden field in the first form of the formset data is filled with the initial value, the others no.</p>
  
  <p>How can I initialize the other forms?</p>
  
  <p>Thanks!</p>