code: def save_model(self, request, obj, form, change):
          
          like_metrics = self.model.objects.filter(name=obj.name)
          # 2.7+ only :(
          # = {key: form.cleaned_data[key] for key in form.changed_data}
          updates = {}
          for key in form.changed_data:
              updates[key] = form.cleaned_data[key]
          like_metrics.update(**updates)
docs: Updates all metrics with the same name