Fix UPS host maintenance date save issue

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"
-                                       value="{{ form.last_maintenance_date.value|date:'Y-m-d' }}"
+                                       {% if form.last_maintenance_date.value %}value="{{ form.last_maintenance_date.value|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

@@ -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()
+        
+        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)
 
 
 class UPSHostDeleteView(DeleteView):