恢复被删除的代码

soul-api/internal/database/database.go

@@ -0,0 +1,40 @@
+package database
+
+import (
+	"log"
+
+	"soul-api/internal/model"
+
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
+)
+
+var db *gorm.DB
+
+// Init 使用 DSN 连接 MySQL，供 handler 通过 DB() 使用
+func Init(dsn string) error {
+	var err error
+	db, err = gorm.Open(mysql.Open(dsn), &gorm.Config{})
+	if err != nil {
+		return err
+	}
+	if err := db.AutoMigrate(&model.WechatCallbackLog{}); err != nil {
+		log.Printf("database: wechat_callback_logs migrate warning: %v", err)
+	}
+	if err := db.AutoMigrate(&model.Withdrawal{}); err != nil {
+		log.Printf("database: withdrawals migrate warning: %v", err)
+	}
+	if err := db.AutoMigrate(&model.MatchRecord{}); err != nil {
+		log.Printf("database: match_records migrate warning: %v", err)
+	}
+	if err := db.AutoMigrate(&model.UserAddress{}); err != nil {
+		log.Printf("database: user_addresses migrate warning: %v", err)
+	}
+	log.Println("database: connected")
+	return nil
+}
+
+// DB 返回全局 *gorm.DB，仅在 Init 成功后调用
+func DB() *gorm.DB {
+	return db
+}