我正在尝试使用mongodb作为服务，并开始使用heroku服务，即dashboard.heroku.com/apps/scaleqamongo/resources。 我尝试了多个插件，他们称之为mongolab，mongohq。 我创build数据库，然后尝试将该服务地址添加到我的应用程序中
db: 'mongodb://username:[email protected]:10292,candidate.18.mongolayer.com:10292/app25406086', 但它给了我错误
Error: Cannot determine state of server Error: No replica set primary available for query with ReadPreference PRIMARY at ReplSet.checkoutReader (/prod/app/dashboard/node_modules/mongoose/node_modules/mongodb/lib/mongodb/connection/repl_set/repl_set.js:585:14) at Cursor.nextObject (/prod/app/dashboard/node_modules/mongoose/node_modules/mongodb/lib/mongodb/cursor.js:723:48) at Cursor.nextObject (/prod/app/dashboard/node_modules/mongoose/node_modules/mongodb/lib/mongodb/scope.js:22:20) at Collection.findOne (/prod/app/dashboard/node_modules/mongoose/node_modules/mongodb/lib/mongodb/collection/query.js:157:10) at /prod/app/dashboard/node_modules/connect-mongo/lib/connect-mongo.js:214:18 at MongoStore._get_collection (/prod/app/dashboard/node_modules/connect-mongo/lib/connect-mongo.js:148:21) at MongoStore.get (/prod/app/dashboard/node_modules/connect-mongo/lib/connect-mongo.js:213:10) at Object.session [as handle] (/prod/app/dashboard/node_modules/express/node_modules/connect/lib/middleware/session.js:311:11) at next (/prod/app/dashboard/node_modules/express/node_modules/connect/lib/proto.js:193:15) at Object.methodOverride [as handle] (/prod/app/dashboard/node_modules/express/node_modules/connect/lib/middleware/methodOverride.js:48:5)
虽然我可以使用shell命令连接到数据库
mongo candidate.19.mongolayer.com:10292/app25406086 -u username -p password
问题是什么？ 为什么我无法连接？
这是Mongoose驱动程序/ ODM的错误。
试试这个（取自文档）：
var uri = "mongodb://username:[email protected]:10292,candidate.18.mongolayer.com:10292/app25406086" var options = { replset: { rs_name: 'myReplicaSetName' } } mongoose.connect(uri, options);