MongoDB（Node.js）找不到预期的结果
我正试图从节点发现到一个mongodb服务器。 这里是代码：
var mongo = require('mongodb'), Server = mongo.Server, Db = mongo.Db; var mongoServer = new Server(10.141.74.74, 28019,{auto_reconnect: true, safe:true}); var db = new Db("statusReport", mongoServer, {safe:true}); db.open(function(err,db){ if(!err){ db.collection("status",function(err,collection){ if(!err){ collection.find({}, function(a,b){ console.log(a); console.log(b); }); }else{ console.log("ERROR: could not open collection"); } }); db.close(); }else{ console.log("ERROR: could not open database"); } }); 但是，不是返回数据，而是返回这个：
{ db: { domain: null, _events: { open: [] }, _maxListeners: 10, databaseName: 'statusReport', serverConfig: { domain: null, _events: null, _maxListeners: 10, host: '10.141.74.74', port: 28019, options: [Object], internalMaster: true, connected: true, poolSize: 5, disableDriverBSONSizeCheck: false, ssl: false, slaveOk: undefined, _used: true, _readPreference: null, socketOptions: [Object], logger: [Object], eventHandlers: [Object], _serverState: 'connected', _state: [Object], recordQueryStats: false, dbInstance: [Circular], dbInstances: [Object], connectionPool: [Object], isMasterDoc: [Object] }, options: { safe: true }, _applicationClosed: false, native_parser: undefined, bsonLib: { Code: [Function: Code], Symbol: [Function: Symbol], BSON: [Object], DBRef: [Function: DBRef], Binary: [Object], ObjectID: [Object], Long: [Object], Timestamp: [Object], Double: [Function: Double], MinKey: [Function: MinKey], MaxKey: [Function: MaxKey] }, bson: {}, bson_deserializer: { Code: [Function: Code], Symbol: [Function: Symbol], BSON: [Object], DBRef: [Function: DBRef], Binary: [Object], ObjectID: [Object], Long: [Object], Timestamp: [Object], Double: [Function: Double], MinKey: [Function: MinKey], MaxKey: [Function: MaxKey] }, bson_serializer: { Code: [Function: Code], Symbol: [Function: Symbol], BSON: [Object], DBRef: [Function: DBRef], Binary: [Object], ObjectID: [Object], Long: [Object], Timestamp: [Object], Double: [Function: Double], MinKey: [Function: MinKey], MaxKey: [Function: MaxKey] }, _state: 'connected', pkFactory: { [Function: ObjectID] index: 0, createPk: [Function: createPk], createFromTime: [Function: createFromTime], createFromHexString: [Function: createFromHexString] }, forceServerObjectId: false, safe: true, notReplied: {}, isInitializing: true, auths: [], openCalled: true, commands: [], _callBackStore: { domain: null, _events: {}, _maxListeners: 10, _notReplied: {} }, logger: { error: [Function], log: [Function], debug: [Function] }, slaveOk: false, tag: 1363118044637, eventHandlers: { error: [], parseError: [], poolReady: [], message: [], close: [] }, serializeFunctions: false, raw: false, recordQueryStats: false, reaperEnabled: false, _lastReaperTimestamp: 1363118044637, retryMiliSeconds: 1000, numberOfRetries: 60, reaperInterval: 10000, reaperTimeout: 30000, readPreference: undefined }, collection: { db: { domain: null, _events: [Object], _maxListeners: 10, databaseName: 'statusReport', serverConfig: [Object], options: [Object], _applicationClosed: false, native_parser: undefined, bsonLib: [Object], bson: {}, bson_deserializer: [Object], bson_serializer: [Object], _state: 'connected', pkFactory: [Object], forceServerObjectId: false, safe: true, notReplied: {}, isInitializing: true, auths: [], openCalled: true, commands: [], _callBackStore: [Object], logger: [Object], slaveOk: false, tag: 1363118044637, eventHandlers: [Object], serializeFunctions: false, raw: false, recordQueryStats: false, reaperEnabled: false, _lastReaperTimestamp: 1363118044637, retryMiliSeconds: 1000, numberOfRetries: 60, reaperInterval: 10000, reaperTimeout: 30000, readPreference: undefined }, collectionName: 'status', internalHint: null, opts: {}, slaveOk: false, serializeFunctions: false, raw: false, readPreference: 'primary', pkFactory: { [Function: ObjectID] index: 0, createPk: [Function: createPk], createFromTime: [Function: createFromTime], createFromHexString: [Function: createFromHexString] } }, selector: {}, fields: undefined, skipValue: 0, limitValue: 0, sortValue: undefined, hint: null, explainValue: undefined, snapshot: undefined, timeout: true, tailable: undefined, awaitdata: undefined, numberOfRetries: 5, currentNumberOfRetries: 5, batchSizeValue: 0, slaveOk: false, raw: false, read: 'primary', returnKey: undefined, maxScan: undefined, min: undefined, max: undefined, showDiskLoc: undefined, comment: undefined, tailableRetryInterval: 100, exhaust: false, partial: false, totalNumberOfRecords: 0, items: [], cursorId: { _bsontype: 'Long', low_: 0, high_: 0 }, dbName: undefined, state: 0, queryRun: false, getMoreTimer: false, collectionName: 'statusReport.status' }
我知道里面有东西，因为我可以使用MongoHub来看它。 我也可以在那里查询。 这里有什么问题？
我也试过做collection.insert（这里有一些数据）和插入工程。 只是find没有。
collection.find(callback)返回游标，而不是文档。 你想做的事情是：
collection.find().toArray(callback)