fix:处理了边界情况

backend/internal/middleware/redis/cache.go

@@ -3,8 +3,6 @@ package redis
 import (
 	"context"
 	"time"
-
-	"github.com/redis/go-redis/v9"
 )
 
 func (c *Client) GetBytes(ctx context.Context, key string) ([]byte, error) {
@@ -19,6 +17,6 @@ func (c *Client) Del(ctx context.Context, key string) error {
 	return c.rdb.Del(ctx, key).Err()
 }
 
-func (c *Client) MGet(cacheCtx context.Context, cacheKeys ...string) *redis.SliceCmd {
-	return c.rdb.MGet(cacheCtx, cacheKeys...)
+func (c *Client) MGet(cacheCtx context.Context, cacheKeys ...string) ([]interface{}, error) {
+	return c.rdb.MGet(cacheCtx, cacheKeys...).Result()
 }