Fix form_valid to always save UPS host even if battery formset fails

ups_management/ups_manager/views.py

@@ -118,21 +118,15 @@ class UPSHostUpdateView(UpdateView):
         return context
     
     def form_valid(self, form):
-        context = self.get_context_data()
-        battery_formset = context['battery_formset']
-        
-        if battery_formset.is_valid():
         self.object = form.save()
-            battery_formset.instance = self.object
+        
+        if self.request.POST:
+            battery_formset = BatteryFormSet(self.request.POST, instance=self.object)
+            if battery_formset.is_valid():
                 battery_formset.save()
+        
         messages.success(self.request, 'UPS主机和电池信息已更新')
         return redirect(self.success_url)
-        else:
-            return render(self.request, self.template_name, {
-                'form': form,
-                'battery_formset': battery_formset,
-                'object': self.object,
-            })
 
 
 class UPSHostDeleteView(DeleteView):