refactor: banner新增相关分类数据字段

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');
+    }
+}