refactor: banner新增相关分类数据字段

app/admin/model/v1/SysBannerItemModel.php

@@ -17,12 +17,34 @@ class SysBannerItemModel extends SysBannerItemBaseModel
     // 软删除字段
     protected $deleteTime = 'deleted_at';
 
+    // 绑定产品分类关联模型中字段到父模型
+    protected $append = ['rel_prod_cate_id', 'rel_prod_cate_name'];
+    // 要隐藏的字段或关联模型数据字段
+    protected $hidden = ['prod_mapping'];
+
     // 关联分类
     public function banner()
     {
         return $this->belongsTo(SysBannerModel::class, 'banner_id', 'id');
     }
 
+    // 关联相关产品分类中间表模型
+    public function prodMapping()
+    {
+        return $this->hasOne(SysBannerProdCateMappingModel::class, 'banner_item_id', 'id');
+    }
+
+    // 从产品分类关联模型中获取id字段
+    public function getRelProdCateIdAttr()
+    {
+        return $this->prodMapping?->category?->id;
+    }
+    // 从产品分类关联模型中获取name字段
+    public function getRelProdCateNameAttr()
+    {
+        return $this->prodMapping?->category?->name;
+    }
+
     // 按横幅标题搜索
     public function searchTitleAttr($query, $value, $data)
     {

app/admin/model/v1/SysBannerProdCateMappingModel.php

@@ -0,0 +1,19 @@
+<?php
+declare (strict_types = 1);
+
+namespace app\admin\model\v1;
+
+use app\common\model\SysBannerProdCateMappingBaseModel;
+
+/**
+ * banner与产品分类关联表模型
+ * @mixin \think\Model
+ */
+class SysBannerProdCateMappingModel extends SysBannerProdCateMappingBaseModel
+{
+    // 关联产品分类
+    public function category()
+    {
+        return $this->belongsTo(ProductCategoryModel::class, 'product_category_id', 'id');
+    }
+}