feat: major update - MySQL, chat, wishlist, PWA, admin overhaul

mengyastore-backend/internal/database/db.go

@@ -0,0 +1,45 @@
+package database
+
+import (
+	"log"
+	"time"
+
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+)
+
+// Open initialises a GORM DB connection and runs AutoMigrate for all models.
+func Open(dsn string) (*gorm.DB, error) {
+	db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{
+		Logger: logger.Default.LogMode(logger.Warn),
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	sqlDB, err := db.DB()
+	if err != nil {
+		return nil, err
+	}
+	sqlDB.SetMaxIdleConns(5)
+	sqlDB.SetMaxOpenConns(20)
+	sqlDB.SetConnMaxLifetime(time.Hour)
+
+	if err := autoMigrate(db); err != nil {
+		return nil, err
+	}
+	log.Println("[DB] 数据库连接成功，表结构已同步")
+	return db, nil
+}
+
+func autoMigrate(db *gorm.DB) error {
+	return db.AutoMigrate(
+		&ProductRow{},
+		&ProductCodeRow{},
+		&OrderRow{},
+		&SiteSettingRow{},
+		&WishlistRow{},
+		&ChatMessageRow{},
+	)
+}