Fix form validation issue in UPS host update

ups_management/ups_manager/templates/ups_manager/ups_form.html

@@ -91,7 +91,7 @@
                                        id="{{ form.last_maintenance_date.id_for_label }}" 
                                        name="{{ form.last_maintenance_date.name }}" 
                                        class="form-control datepicker"
-                                       {% if form.last_maintenance_date.value %}value="{{ form.last_maintenance_date.value|date:'Y-m-d' }}"{% endif %}
+                                       {% if form.instance.last_maintenance_date %}value="{{ form.instance.last_maintenance_date|date:'Y-m-d' }}"{% endif %}
                                        placeholder="选择日期">
                                 {% if form.last_maintenance_date.errors %}
                                     {% for error in form.last_maintenance_date.errors %}

ups_management/ups_manager/views.py

@@ -118,17 +118,15 @@ class UPSHostUpdateView(UpdateView):
         return context
     
     def form_valid(self, form):
-        context = self.get_context_data()
-        battery_formset = context['battery_formset']
-        
         self.object = form.save()
         
-        if battery_formset:
-            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)
+        return super().form_valid(form)
 
 
 class UPSHostDeleteView(DeleteView):