76 lines
2.9 KiB
Go
76 lines
2.9 KiB
Go
// Command backfill_title_cn 把 brand_runway.title_cn 由已解析的结构化分类字段
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// （year / collection_type / season）规则生成中文走秀标题。
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//
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// 设计：
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// - title 字段本质就是「季节/品类描述」（Vogue 格式：Spring 2026 Ready-to-Wear、
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// Resort 2026、Pre-Fall 2023、Fall 2023 Couture、Spring 2024 Menswear），
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// 品牌名在 JOIN 出的 brand_name 里单独给，不混进 title。
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// - collection_type / season 早已由历史迁移解析回填，因此 title_cn 可纯规则生成，
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// 完全不依赖外部翻译服务，且结果稳定可重跑。
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//
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// 幂等：每次都按分类字段重新计算并整表覆盖，重跑无害。
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// 不写任何业务逻辑，仅做一次性数据回填。
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package main
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import (
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"fmt"
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"log"
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"gorm.io/driver/mysql"
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"gorm.io/gorm"
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)
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const dsn = "root:root@tcp(127.0.0.1:3306)/db?charset=utf8mb4&parseTime=True&loc=Local"
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// titleCnSQL 单条 UPDATE 用 CASE 把分类字段映射为中文标题。
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// year 参与拼接（CONCAT），season 为 NULL 时 COALESCE 成 ''。
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const titleCnSQL = `
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UPDATE brand_runway
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SET title_cn = CASE
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WHEN collection_type = 'resort' THEN CONCAT(year, ' 度假系列')
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WHEN collection_type = 'pre_fall' THEN CONCAT(year, ' 早秋系列')
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WHEN collection_type = 'rtw' AND season = 'spring' THEN CONCAT(year, ' 春夏成衣')
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WHEN collection_type = 'rtw' AND season = 'fall' THEN CONCAT(year, ' 秋冬成衣')
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WHEN collection_type = 'rtw' THEN CONCAT(year, ' 成衣')
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WHEN collection_type = 'menswear' AND season = 'spring' THEN CONCAT(year, ' 春夏男装')
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WHEN collection_type = 'menswear' AND season = 'fall' THEN CONCAT(year, ' 秋冬男装')
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WHEN collection_type = 'couture' AND season = 'spring' THEN CONCAT(year, ' 春夏高定')
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WHEN collection_type = 'couture' AND season = 'fall' THEN CONCAT(year, ' 秋冬高定')
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ELSE CONCAT(year, ' 系列')
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END
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WHERE is_deleted = 0`
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func main() {
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db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
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if err != nil {
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log.Fatal("open:", err)
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}
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var before int64
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db.Raw(`SELECT COUNT(*) FROM brand_runway WHERE is_deleted=0 AND title_cn <> ''`).Scan(&before)
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fmt.Printf("before: title_cn 非空 = %d\n", before)
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if r := db.Exec(titleCnSQL); r.Error != nil {
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log.Fatalf("backfill title_cn failed: %v", r.Error)
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} else {
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fmt.Printf("updated rows = %d\n", r.RowsAffected)
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}
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var after int64
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db.Raw(`SELECT COUNT(*) FROM brand_runway WHERE is_deleted=0 AND title_cn <> ''`).Scan(&after)
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fmt.Printf("after: title_cn 非空 = %d\n", after)
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// 抽样核对：原始 title -> 生成 title_cn
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type row struct {
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Title string
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TitleCn string
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}
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var rows []row
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db.Raw(`SELECT title, title_cn FROM brand_runway WHERE is_deleted=0 ORDER BY id LIMIT 12`).Scan(&rows)
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fmt.Println("samples:")
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for _, r := range rows {
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fmt.Printf(" %-32q -> %q\n", r.Title, r.TitleCn)
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}
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fmt.Println("title_cn backfill done.")
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}
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