diff --git a/docs/sql/2026-07-21_cms_model_add_case.sql b/docs/sql/2026-07-21_cms_model_add_case.sql
new file mode 100644
index 0000000..38c9961
--- /dev/null
+++ b/docs/sql/2026-07-21_cms_model_add_case.sql
@@ -0,0 +1,9 @@
+-- 栏目模型「案例(case)」补充：解决后台栏目导航选择模型=case 时后端 NPE 报“操作失败”的问题。
+-- 后端 CmsNavigationServiceImpl.saveAsync 会按 navigation.getModel() 到 cms_model 查模型信息，
+-- 若不存在则 model 为 null，随后 model.getSuffix() 抛 NPE。
+-- 插入该模型后即可与 page/article/product 行为一致（banner/thumb/suffix 可被复用）。
+-- 说明：saveAsync 已改为 null 安全，即使本行未执行，case 也能正常保存（仅无 suffix）。
+
+INSERT INTO cms_model (name, model, component, component_detail, banner, suffix, thumb, show_type, disabled, sort_number, status, deleted, create_time, update_time)
+SELECT '案例', 'case', '/pages/case/index.vue', '/pages/case/[id].vue', NULL, NULL, NULL, 20, 0, 40, 0, 0, NOW(), NOW()
+WHERE NOT EXISTS (SELECT 1 FROM cms_model WHERE model = 'case');
diff --git a/src/main/java/com/gxwebsoft/cms/service/impl/CmsNavigationServiceImpl.java b/src/main/java/com/gxwebsoft/cms/service/impl/CmsNavigationServiceImpl.java
index de15120..bef98e0 100644
--- a/src/main/java/com/gxwebsoft/cms/service/impl/CmsNavigationServiceImpl.java
+++ b/src/main/java/com/gxwebsoft/cms/service/impl/CmsNavigationServiceImpl.java
@@ -102,7 +102,7 @@ public class CmsNavigationServiceImpl extends ServiceImpl<CmsNavigationMapper, C
       navigation.setComponent(MessageFormat.format("/pages/{0}/{1}", navigation.getModel(), "[id].vue"));
 
       // 1.2自定义文件后缀
-      if(!navigation.getModel().equals("index") && model.getSuffix() != null){
+      if(!navigation.getModel().equals("index") && model != null && model.getSuffix() != null){
         navigation.setPath(navigation.getPath() + model.getSuffix());
       }