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mongodb - 错误 : "could not find implicit value for parameter readFileReader" trying to save a file using GridFS with reactivemongo

我正在尝试使用以下代码在Play2.1中使用reactivemongo保存附件:defupload=Action(parse.multipartFormData){request=>request.body.file("carPicture").map{picture=>valfilename=picture.filenamevalcontentType=picture.contentTypevalgridFS=newGridFS(db,"attachments")valfileToSave=DefaultFileToSave(filename,contentType)valfutur

java - com.mongodb.DBPortPool 得到错误警告 : emptying DBPortPool to/IP:27017 b/c of error using spring MongoTemplate

使用org.springframework.data.mongodb.core.MongoTemplate在您的代码尝试使用它之前,MongoDB驱动程序似乎无法从连接池中删除丢弃的套接字错误如下:2013-9-29:13:16com.mongodb.DBPortPoolgotError警告:emptyingDBPortPoolto/IP:27017b/coferrorjava.net.SocketException:Connectionresetbypeer:socketwriteerroratjava.net.SocketOutputStream.socketWrite0(Nati

javascript - meteor 集合 find() 不检索任何数据

我正在学习meteor教程:https://www.meteor.com/tutorials/blaze/collections我定义了一个集合,Tasks=newMongo.Collection("tasks");我向其中添加了两项,一项直接来自meteormongo命令行,另一项使用:Tasks.insert({text:"TestingJS",createdAt:newDate()});以下是在后端运行db.tasks.find()的结果:{"_id":ObjectId("559e9569abbb64fe1d5fd89a"),"text":"Helloworld!","creat

mongodb - sbt 编译产生 "object casbah is not a member of package com.mongodb"

我的目录结构:-build.sbt-src--main---scala----MongoConnect.scala-lib我的build.sbt:name:="mongodb-experiments"version:="0.1"libraryDependencies++=Seq("com.mongodb.casbah"%%"casbah"%"3.0.0-SNAPSHOT")resolvers+="SonatypeOSSSnapshots"at"https://oss.sonatype.org/content/repositories/snapshots"我的MongoConnect.s

node.js - MongoError : cannot establish topology capabilities as driver is still in process of connecting at Server. 功能

我正在尝试通过mongoose.connect连接到mongoDB,但我仍然收到错误:/Users/Documents/Business/01000100/node_modules/connect-mongo/lib/connect-mongo.js:133throwerr;^MongoError:cannotestablishtopologycapabilitiesasdriverisstillinprocessofconnectingatServer.capabilitiesauth_server.js:varexpress=require('express')varbody_pa

Java -- MongoDB collection.find() by _id

我试图通过使用他的唯一_id从集合中获取元素,但我找不到方法。这是我的代码MongoClientmongoClient=newMongoClient("localhost",27017);MongoDatabasedatabase=mongoClient.getDatabase("DB");MongoCollectioncollection=database.getCollection("COLL");如果我用查询我的数据库BasicDBObjectquery=newBasicDBObject("info.i0","0");DocumentmyDoc=collection.find(q

ruby-on-rails - “validates_presence_of”在 Mongoid 中效果不佳?

有两个类:classPersonincludeMongoid::Documentfield:nameembeds_many:addressesendclassAddressincludeMongoid::Documentfield:cityfield:streetvalidates_presence_of:city,:streetend我们可以看到,我们已经验证了city和street应该存在。但是看下面的代码:person=Person.newperson.addressestrue并且,我们使用mongo直接查看数据库:$mongo>usethe_db>db.people.find

node.js - MongooseJS 使用 find 通过引用查找

我有这个Mongoose模式。varmongoose=require('mongoose'),dev=require('../db').dev();varschema=newmongoose.Schema({date:{type:Date,default:Date.now},company:{type:mongoose.Schema.Types.ObjectId,ref:'Company'},questionnaire:{type:mongoose.Schema.Types.ObjectId,ref:'Questionnaire'}});module.exports=dev.model

javascript - 为什么 mongodb find() 从来没有得到我的回调

我正在尝试使用mongodb(带有mogoose)和带有restify的node.js构建类似rest的API。我是mongo世界的绝对新手,我不确定问题出在哪里。这是数据库连接的问题还是其他原因?所以,我是这样做的:rest-server.js//startservervarrestify=require('restify');varserver=restify.createServer();server.use(restify.bodyParser());//connectdbvarconfig=require('./Config.js');varmongoose=require(

mongodb - 蒙哥错误: failed to connect to server on first connect

constexpress=require('express')constapp=express()//initialisedexpress.usingexpressbyrequiringit.//conectingtheservertobrowsersconstbodyParser=require('body-parser')constMongoClient=require('mongodb').MongoClientvardbMongoClient.connect('mongodb://aryan:aryan@ds127938.mlab.com:27938/post-quotes',