refactor: 修改横幅（分类）关于唯一标识验证规则

app/admin/controller/v1/Banner.php

@@ -69,7 +69,7 @@ class Banner
             'name',
             'desc',
             'recommend',
-            'unique_label' => '',
+            'unique_label',
             'at_platform'  => 'pc',
             'status'       => 1
         ]);

app/admin/validate/v1/SysBannerValidate.php

@@ -51,26 +51,22 @@ class SysBannerValidate extends Validate
     // 新增场景
     public function sceneAdd()
     {
-        return $this->remove('id', 'require|integer');
+        return $this->remove('id', 'require|integer')->append('unique_label', 'require');
     }
 
     // 编辑场景
     public function sceneEdit()
     {
-        return $this->remove('language_id', 'require|integer')->append('unique_label', 'empty');
+        return $this->remove('language_id', 'require|integer')->append('unique_label', 'mustOmit');
     }
 
     // 验证是否为空
-    protected function empty($value, $rule, $data)
+    protected function mustOmit($value, $rule, $data)
     {
         if (!isset($data['unique_label'])) {
             return true;
         }
 
-        if (is_null($value) || $value == '') {
-            return true;
-        }
-
         return "unique_label必须为空";
     }
 }