refactor: 产品分类添加path层级路径逻辑

app/admin/controller/v1/ProductCategory.php

@@ -98,6 +98,9 @@ class ProductCategory
         if ($data['pid'] > 0) {
             $parent = $category->bypk($data['pid'])->find();
             if (!empty($parent)) {
+                if (!empty($parent->path)) {
+                    $data['path']  = $parent->path . ',' . $parent->id;
+                }
                 $data['level'] = $parent->level + 1;
             }
         }
@@ -145,6 +148,10 @@ class ProductCategory
         if ($data['pid'] != $category->pid) {
             $parent = ProductCategoryModel::bypk($data['pid'])->find();
             if (!empty($parent)) {
+                $data['path']  = $parent->id;
+                if (!empty($parent->path)) {
+                    $data['path']  = $parent->path . ',' . $data['path'];
+                }
                 $data['level'] = $parent->level + 1;
                 $updated_level = true;
             }
@@ -156,21 +163,24 @@ class ProductCategory
 
         // 处理子分类层级
         if ($updated_level) {
-            $this->handle_children($category->id, $data['level']);
+            $this->handle_children($category->id, $data['path'], $data['level']);
         }
 
         return success('操作成功');
     }
-    private function handle_children($pid, $level)
+    private function handle_children($pid, $path, $level)
     {
         $children = ProductCategoryModel::pid($pid)->select();
         if ($children->isEmpty()) {
             return;
         }
         foreach ($children as $child) {
+            if (!empty($path)) {
+                $child->path = $path. ','. $child->pid;
+            }
             $child->level = $level + 1;
             if ($child->save()) {
-                $this->handle_children($child->id, $child->level);
+                $this->handle_children($child->id, $child->path, $child->level);
             }
         }
     }

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;
         }
 

app/common/model/ProductCategoryBaseModel.php

@@ -21,6 +21,7 @@ class ProductCategoryBaseModel extends BaseModel
         'language_id'          => 'int',
         'unique_id'            => 'string',
         'pid'                  => 'int',
+        'path'                 => 'string',
         'name'                 => 'string',
         'icon'                 => 'string',
         'desc'                 => 'string',

database/migrations/20241219090629_create_product_category.php

@@ -32,6 +32,7 @@ class CreateProductCategory extends Migrator
         $table->addColumn('language_id', 'integer', ['signed' => false, 'null' => false, 'comment' => '语言ID'])
             ->addColumn('unique_id', 'string', ['limit' => 64, 'null' => false, 'comment' => '唯一ID'])
             ->addColumn('pid', 'integer', ['signed' => false, 'null' => false, 'default' => 0, 'comment' => '父级ID'])
+            ->addColumn('path', 'string', ['limit' => 128, 'null' => true, 'default' => null, 'comment' => '层级路径'])
             ->addColumn('name', 'string', ['limit' => 64, 'null' => false, 'comment' => '分类名称'])
             ->addColumn('icon', 'string', ['limit' => 125, 'default' => null, 'comment' => '图标'])
             ->addColumn('desc', 'string', ['limit' => 255, 'default' => null, 'comment' => '描述信息'])