nodejs使用connect-mongodb报错（Please ensure that you set the default write concern）

============ = Please ensure that you set the default write concern for the database by setting = = one of the options = = = = w: (value of > -1 or the string ‘majority‘), where < 1 means = = no write acknowledgement = = journal: true/false, wait for flush to journal before acknowledgement = = fsync: true/false, wait for flush to file system before acknowledgemen t = = = = For backward compatibility safe is still supported and = = allows values of [true | false | {j:true} | {w:n, wtimeout:n} | {fsync:t rue}] = = the default value is false which means the driver receives does not = = return the information of the success/error of the insert/update/remove = = = = ex: new Db(new Server(‘localhost‘, 27017), {safe:false}) = = = = http://www.mongodb.org/display/DOCS/getLastError+Command = = = = The default of no acknowledgement will change in the very near future = = = = This message will disappear when the default safe is set on the driver Db = ============================================================================ ============ Sat, 27 Jun 2015 12:49:12 GMT express-session deprecated undefined resave option ; provide resave option at app.js:20:9 Sat, 27 Jun 2015 12:49:12 GMT express-session deprecated undefined saveUninitial ized option; provide saveUninitialized option at app.js:20:9 moviesite started on port 3000

下边的警告在session中添加两个属性值restart和saveUninitialized即可解决。

Sat, 27 Jun 2015 12:49:12 GMT express-session deprecated undefined resave option
; provide resave option at app.js:20:9
Sat, 27 Jun 2015 12:49:12 GMT express-session deprecated undefined saveUninitial
ized option; provide saveUninitialized option at app.js:20:9

如：
    app.use(session({
    resave: false,//重新保存：强制会话保存即使是未修改的。(默认值ture)
    saveUninitialized: true,//强制保存未初始化的会话到存储器
    cookie: {maxAge:3600000}, 
    secret:‘imooc‘,
    store:new mongoStore({
        url:dbUrl,
        collection:‘sessions‘
    })
    }))

剩下的警告应该是数据库不是安全连接，还未能解决，知道的朋友告诉一下

nodejs使用connect-mongodb报错（Please ensure that you set the default write concern）

标签：mongodb   nodejs