优惠券

routes/products.js

@@ -919,41 +919,112 @@ router.get('/:id/reviews', async (req, res) => {
 // 获取推荐商品
 router.get('/:id/recommended', async (req, res) => {
   try {
+    // 获取商品id
     const id = parseInt(req.params.id);
-    
-    // 获取同类别的其他商品作为推荐
-    const query = `
-      SELECT p2.id, p2.name, p2.price, p2.points_price as points, 
-             p2.stock, p2.image_url as image, p2.description
-      FROM products p1
-      WHERE p1.id = ? AND p2.id != ? AND p2.status = 'active'
-      ORDER BY RAND()
-      LIMIT 6
+
+    // 通过商品id获取该商品的分类id
+    const categoryQuery = `
+      SELECT category_id FROM products_category WHERE product_id = ?
     `;
+    const [currentCategory] = await getDB().execute(categoryQuery, [id]);
     
-    const [recommendedProducts] = await getDB().execute(query, [id, id]);
+    let parentId = null;
+    let categoryIds = currentCategory.map(item => item.category_id);
     
-    // 如果同类别商品不足，补充其他热门商品
-    if (recommendedProducts.length < 6) {
-      const remainingCount = 6 - recommendedProducts.length;
-      if (remainingCount > 0) {
-        const additionalQuery = `
+    if(currentCategory.length > 0 && currentCategory[0] !== null) {
+      // 获取该商品的一级分类id
+      const item = currentCategory[0];
+      const levelQuery = `
+        SELECT * FROM category WHERE id = ? AND level = 1
+      `;
+      const [fatherCategory] = await getDB().execute(levelQuery, [item.category_id]);
+      
+      if(fatherCategory.length > 0) {
+        // 该商品为一级分类商品，不存在二级分类
+        parentId = fatherCategory[0].id;
+        categoryIds.push(parentId);
+      } else {
+        // 获取该商品的二级分类id
+        const secondlevelQuery = `
+          SELECT * FROM category WHERE id = ? AND level = 2
+        `;
+        const [secondlevelCategory] = await getDB().execute(secondlevelQuery, [item.category_id]);
+        if(secondlevelCategory.length > 0) {
+          // 通过二级分类获取一级分类id
+          parentId = secondlevelCategory[0].parent_id;
+          categoryIds.push(parentId);
+        }
+      }
+    }
+
+    // categoryIds目前存储该商品的一级分类id及其目录下所有二级分类的id
+    const allSecondCategoryIdsQuery = `
+      SELECT id FROM category WHERE parent_id = ? AND level = 2
+    `;
+    const [secondCategoryIds] = await getDB().execute(allSecondCategoryIdsQuery, [parentId]);
+    categoryIds.push(...secondCategoryIds.map(item => item.id));
+
+    let recommendedProducts = [];
+
+    // 如果有分类ID，先获取同类商品
+    if (categoryIds.length > 0) {
+      const recommendId = `
+        SELECT * FROM products_category WHERE category_id IN (${categoryIds.map(() => '?').join(',')})
+      `;
+      const [recommendProductIds] = await getDB().execute(recommendId, categoryIds);
+      console.log(1234, recommendProductIds);
+
+      const filteredRecommendProductIds = [...new Set(recommendProductIds.map(item => item.product_id))];
+      console.log(12345, filteredRecommendProductIds);
+
+      // 获取同类别的其他商品作为推荐
+      if (filteredRecommendProductIds.length > 0) {
+        const query = `
           SELECT id, name, price, points_price as points, 
                  stock, image_url as image, description
           FROM products 
-          WHERE id != ? AND status = 'active'
-          ORDER BY RAND()
-          LIMIT ${remainingCount}
+          WHERE id IN (${filteredRecommendProductIds.map(() => '?').join(',')}) AND id != ?
         `;
         
-        const [additionalProducts] = await getDB().execute(
-          additionalQuery, 
-          [id]
-        );
-        
-        recommendedProducts.push(...additionalProducts);
+        const [categoryProducts] = await getDB().execute(query, [...filteredRecommendProductIds, id]);
+        recommendedProducts = categoryProducts;
       }
     }
+
+        // 如果同类别商品不足，补充其他热门商品
+    // if (recommendedProducts.length < 6) {
+    //   const remainingCount = 6 - recommendedProducts.length;
+    //   const additionalQuery = `
+    //     SELECT id, name, price, points_price as points, 
+    //     stock, image_url as image, description
+    //     FROM products
+    //     WHERE id NOT IN (${filteredRecommendProductIds.map(() => '?').join(',')})
+    //     ORDER BY RAND()
+    //     LIMIT ?
+    //   `;
+    // }
+    // 如果同类别商品不足，补充其他热门商品
+    // if (recommendedProducts.length < 6) {
+    //   const remainingCount = 6 - recommendedProducts.length;
+    //   console.log(11111,typeof remainingCount,remainingCount);
+    //   if (remainingCount > 0) {
+    //     const additionalQuery = `
+    //       SELECT id, name, price, points_price as points, 
+    //              stock, image_url as image, description
+    //       FROM products
+    //       WHERE id != ?
+    //       ORDER BY RAND()
+    //       LIMIT ?
+    //     `;
+        
+    //     const [additionalProducts] = await getDB().execute(
+    //       additionalQuery, 
+    //       [id, remainingCount]  // 现在有两个占位符：id 和 limit
+    //     );
+        
+    //     recommendedProducts.push(...additionalProducts);
+    //   }
+    // }
     
     res.json({
       success: true,