Fix UPS host maintenance date save issue

ups_management/ups_manager/views.py

@@ -121,14 +121,14 @@ class UPSHostUpdateView(UpdateView):
         context = self.get_context_data()
         battery_formset = context['battery_formset']
         
-        if battery_formset.is_valid():
-            self.object = form.save()
+        self.object = form.save()
+        
+        if battery_formset:
             battery_formset.instance = self.object
             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 self.form_invalid(form)
+        
+        messages.success(self.request, 'UPS主机和电池信息已更新')
+        return redirect(self.success_url)
 
 
 class UPSHostDeleteView(DeleteView):