db object already connecting, open cannot be called multiple times

[coolicer]

Express
500 Error: db object already connecting, open cannot be called multiple times
at Db.open (d:\nodejs\blog\node_modules\mongodb\lib\mongodb\db.js:233:11)
at Function.Post.getOne (d:\nodejs\blog\models\post.js:85:11)
at d:\nodejs\blog\routes\index.js:175:8
at callbacks (d:\nodejs\blog\node_modules\express\lib\router\index.js:161:37)
at param (d:\nodejs\blog\node_modules\express\lib\router\index.js:135:11)
at param (d:\nodejs\blog\node_modules\express\lib\router\index.js:132:11)
at param (d:\nodejs\blog\node_modules\express\lib\router\index.js:132:11)
at param (d:\nodejs\blog\node_modules\express\lib\router\index.js:132:11)
at pass (d:\nodejs\blog\node_modules\express\lib\router\index.js:142:5)
at Router._dispatch (d:\nodejs\blog\node_modules\express\lib\router\index.js:170:5)

是否说我的数据库已经连接，我明明关了再开不是不行。 - 。-

[coolicer]

这个错误已经不见了。我写错了一些东西吧