title: add Formset for specific fields in a Django ModelForm
body: <p>I have a form but I want to add Formset feature specific to fields. So how can I achieve this?  </p>
  
  <p>model.py :</p>
  
  <pre><code>class somemodel(model.):
     name=models.TextField(blank=True,null=True)
     somefield=models.TextField(blank=True,null=True)
     somefield=models.TextField(blank=True,null=True)
     somefield=models.TextField(blank=True,null=True)
  </code></pre>
  
  <p>form.py:</p>
  
  <pre><code>class somemodelForm(forms.ModelForm):
      name=forms.CharField(max_length=200,
           widget=forms.TextInput(attrs={'class': 'form-control'}))
  
      #I want to give Formset feature for these bellow fields
  
      somefield=forms.CharField(max_length=200,
           widget=forms.TextInput(attrs={'class': 'form-control'}))
      somefield=forms.CharField(max_length=200,
           widget=forms.TextInput(attrs={'class': 'form-control'}))
      somefield=forms.CharField(max_length=200,
           widget=forms.TextInput(attrs={'class': 'form-control'}))
  
      class Meta:
          model=somemodel
          fields='__all__'
  
  </code></pre>
  
  <p>So those are the information and I want to add Formset feature for only "somefield" fields, not to "name" field.</p>