refactor: 产品分类添加path层级路径逻辑

app/admin/validate/v1/ProductCategoryValidate.php

@@ -66,20 +66,13 @@ class ProductCategoryValidate extends Validate
         if ($value == 0) {
             return true;
         }
-        $table_name = (new ProductCategoryModel)->getTable();
-        $children = Db::query(
-            preg_replace(
-                '/\s+/u', 
-                ' ',
-                "WITH RECURSIVE tree_by AS (
-                    SELECT a.id, a.pid FROM $table_name a WHERE a.id = {$data['id']}
-                    UNION ALL
-                    SELECT k.id, k.pid FROM $table_name k INNER JOIN tree_by t ON t.id = k.pid
-                )
-                SELECT id FROM tree_by WHERE id <> {$data['id']};"
-            )
-        );
-        if (!empty($children) && in_array($data['pid'], array_column($children, 'id'))) {
+        // 如果pid和id相同，返回false
+        if ($value == $data['id']) {
+            return false;
+        }
+        // 如果pid是id的子分类，返回false
+        $children = ProductCategoryModel::whereRaw('FIND_IN_SET(:id, path)', ['id' => $data['id']])->column('id');
+        if (!empty($children) && in_array($value, $children)) {
             return false;
         }