title: How can I change inline forms in django admin?
body: <p>In my django projects I have 2 related models "Vehicle"(parent model) and ParamConf(child model). ParamConf has field "program" and I want to fix some wrong values in it.<br>
  (admin.py):</p>
  
  <pre><code>class ParamConfFormSet(BaseInlineFormSet):
      def clean(self):
          super(ParamConfFormSet, self).clean()
  
          for form in self.forms:
              if hasattr(form, 'cleaned_data') and 'program' in form.cleaned_data:
  
                  program = form.cleaned_data['program'].lower() # &lt;&lt;&lt; I want to save this changed value
                  form.cleaned_data['program'] = program # &lt;&lt;&lt; but this doesn't work :^(
  
  class ParamConfInline(admin.TabularInline):
      model = models.ParamConf
      formset = ParamConfFormSet
  
  
  class VehicleAdminForm(forms.ModelForm):
      class Meta:
          model = models.Vehicle
  
  class VehicleAdmin(admin.ModelAdmin):
      inlines = [ ParamConfInline, ]
      form = VehicleAdminForm
  </code></pre>
  
  <p>I even wrote save() method for ParamConf, but django doesn't want to call it after saving a  Vehicle form(Vehicle's save method is alright).</p>