title: How to differ formsets in django when using modelformset_factory?
body: <p>Let's say I have an Contact object and I want to have two groups of contact Formsets in django(1.8) divided by <strong>fieldset</strong> tag in html template. I use modelformset_factory. Regardless I use one or two different factory functions, fields in these two formsets have same id in html. Since http.Request.body is dictionary, I lose information about one of the two formsets.</p>
  
  <pre><code>contacts_formset = modelformset_factory(
    models.Contact,
    form=forms.ContactDetailForm,
    extra=2)
  
  contacts_escalation_formset_new = contacts_formset(
      queryset=models.Contact.objects.none())
  
  contacts_other_formset_new = contacts_formset(
      queryset=models.Contact.objects.none())
  </code></pre>
  
  <p>in HTML:</p>
  
  <pre><code>input id="id_form-0-name" maxlength="155" name="form-0-name" type="text"
  input id="id_form-0-name" maxlength="155" name="form-0-name" type="text"
  </code></pre>
  
  <p>For simple django form, there is keyword "prefix=..." . But this factory function does not have this argument. How can I solve it?</p>