F:\blog>node app.js
{ [Error: Cannot find module '../build/Release/bson'] code: 'MODULE_NOT_FOUND' }
js-bson: Failed to load c++ bson extension, using pure JS version
Express server listening on port 3000
F:\blog\node_modules\mongodb\lib\mongodb\connection\base.js:246
throw message;
^
TypeError: Cannot read property 'length' of
at processResults (F:\blog\node_modules\mongodb\lib\mongodb\db.js:1603:31)
at F:\blog\node_modules\mongodb\lib\mongodb\db.js:1641:20
at F:\blog\node_modules\mongodb\lib\mongodb\db.js:1179:7
at F:\blog\node_modules\mongodb\lib\mongodb\db.js:1912:9
at Server.Base._callHandler (F:\blog\node_modules\mongodb\lib\mongodb\connec
tion\base.js:448:41)
at F:\blog\node_modules\mongodb\lib\mongodb\connection\server.js:481:18
at MongoReply.parseBody (F:\blog\node_modules\mongodb\lib\mongodb\responses\
mongo_reply.js:68:5)
at null.<anonymous> (F:\blog\node_modules\mongodb\lib\mongodb\connection\ser
ver.js:439:20)
at emitOne (events.js:77:13)
at emit (events.js:169:7)