update

scripts/diag_hot/main.go

@@ -0,0 +1,68 @@
+package main
+
+// 诊断：复现 FeaturedIDs("images", 30) 的 SQL，验证热门品牌排名数据是否合理。
+
+import (
+	"fmt"
+
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
+)
+
+const dsn = "root:root@tcp(127.0.0.1:3306)/db?charset=utf8mb4&parseTime=True&loc=Local"
+
+func main() {
+	db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
+	if err != nil {
+		panic(err)
+	}
+
+	// 1) 复现 FeaturedIDs：按图片总数 DESC 取前 30
+	type Row struct {
+		BrandID uint32 `gorm:"column:brand_id"`
+		Images  int64  `gorm:"column:images"`
+		Shows   int64  `gorm:"column:shows"`
+	}
+	var rows []Row
+	db.Raw(`
+		SELECT brand_id, COALESCE(SUM(image_count),0) AS images, COUNT(*) AS shows
+		FROM brand_runway
+		WHERE is_deleted = 0
+		GROUP BY brand_id
+		ORDER BY images DESC
+		LIMIT 30
+	`).Scan(&rows)
+
+	fmt.Println("== FeaturedIDs(images, 30) 原始排名 ==")
+	for i, r := range rows {
+		var name string
+		db.Raw(`SELECT name_en FROM brand WHERE id = ?`, r.BrandID).Scan(&name)
+		fmt.Printf("%2d. brand_id=%-6d images=%-6d shows=%-4d %s\n", i+1, r.BrandID, r.Images, r.Shows, name)
+	}
+
+	// 2) image_count 分布：有多少品牌有图、多少归零
+	var zeroBrands, hasImgBrands int64
+	var totalRows, zeroRows int64
+	db.Raw(`SELECT COUNT(*) FROM (SELECT brand_id, SUM(image_count) s FROM brand_runway WHERE is_deleted=0 GROUP BY brand_id) t WHERE s = 0`).Scan(&zeroBrands)
+	db.Raw(`SELECT COUNT(*) FROM (SELECT brand_id, SUM(image_count) s FROM brand_runway WHERE is_deleted=0 GROUP BY brand_id) t WHERE s > 0`).Scan(&hasImgBrands)
+	db.Raw(`SELECT COUNT(*) FROM brand_runway WHERE is_deleted=0`).Scan(&totalRows)
+	db.Raw(`SELECT COUNT(*) FROM brand_runway WHERE is_deleted=0 AND image_count=0`).Scan(&zeroRows)
+	fmt.Printf("\n== image_count 分布 ==\n有图品牌=%d 零图品牌=%d | 走秀总行=%d 其中 image_count=0 的行=%d\n", hasImgBrands, zeroBrands, totalRows, zeroRows)
+
+	// 3) 对比口径：按走秀数(shows) DESC 前 10
+	var byShows []Row
+	db.Raw(`
+		SELECT brand_id, COALESCE(SUM(image_count),0) AS images, COUNT(*) AS shows
+		FROM brand_runway
+		WHERE is_deleted = 0
+		GROUP BY brand_id
+		ORDER BY shows DESC
+		LIMIT 10
+	`).Scan(&byShows)
+	fmt.Println("\n== 若按 shows DESC 前 10 ==")
+	for i, r := range byShows {
+		var name string
+		db.Raw(`SELECT name_en FROM brand WHERE id = ?`, r.BrandID).Scan(&name)
+		fmt.Printf("%2d. brand_id=%-6d images=%-6d shows=%-4d %s\n", i+1, r.BrandID, r.Images, r.Shows, name)
+	}
+}