fix: 确保SQLite数据库目录存在后再连接

backend/internal/utils/database.go

@@ -3,6 +3,8 @@ package utils
 import (
 	"fmt"
 	"log"
+	"os"
+	"path/filepath"
 
 	"sale/internal/config"
 	"sale/internal/models"
@@ -38,6 +40,10 @@ func InitDB() {
 			Logger: logger.Default.LogMode(logger.Info),
 		})
 	default:
+		dbDir := filepath.Dir(cfg.FilePath)
+		if err := os.MkdirAll(dbDir, 0755); err != nil {
+			log.Fatalf("Failed to create database directory: %v", err)
+		}
 		DB, err = gorm.Open(sqlite.Open(cfg.FilePath), &gorm.Config{
 			Logger: logger.Default.LogMode(logger.Info),
 		})
@@ -47,7 +53,7 @@ func InitDB() {
 		log.Fatalf("Failed to connect to database: %v", err)
 	}
 
-	log.Printf("Database connected successfully (driver: %s)", cfg.Driver)
+	log.Printf("Database connected successfully (driver: %s, path: %s)", cfg.Driver, cfg.FilePath)
 }
 
 func AutoMigrate() {