mongo

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: dispatcher-servlet.xml <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd http://www.springframework.org

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have two mongo documents that are related to each other in a many to many relationship. One is called Lawyer and the other LawCase. My Lawyer model has: public function cases() { return $this->belongsToMany('App\LawCase'); } My LawCase model has: public function lawyers() { return $this->belongsToMany('App\Lawyer'); } All I am trying to do is find lawyers that have a certain category of law cases. $lawyers = App\Lawyer::whereHas('cases', function($q){ $q->where('category', '=', 'DUI'); })->get(); This gets nothing even though I have

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: When I try to create this error shows up: Error (E_UNKNOWN) :: Encountered an unexpected error MongoError: topology was destroyed at Server.insert (/Users/oscargallon/Documents/developer/sails/reyesmagoswebpae/node_modules/sails-mongo/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:797:49) here's my model module.exports = { attributes: { name: { type: 'string', required: true }, email: { type: 'String', required: true }, description: { type: 'string', required: true }, phonenumber: { type: 'string', required: true },

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Suppose I have a Mongo DB with only one collection data . In this collection, I have the following documents: { "type": "person", "value": { "id": 1, "name": "Person 1", "age": 10 } }, { "type": "person", "value": { "id": 2, "name": "Person 2", "age": 20 } }, { "type": "prescription", "value": { "drug": "Bromhexine", "patient": 2 } }, { "type": "prescription", "value": { "drug": "Aspirin", "patient": 1 } } With those records, I'd like to make a JOIN between documents with "type": person and "type": prescription on value.id = value.patient .

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Fatal error: Uncaught exception 'MongoConnectionException' with message 'Failed to connect to: localhost:27017: Permission denied' in /var/www/html/test.php:8 Stack trace: #0 /var/www/html/test.php(8): MongoClient->__construct() #1 {main} thrown in /var/www/html/test.php on line 8 Hi Mongo experts... I am a developer wanting to try out MongoDB. So installed centoOS 6.5 64bit in a test machine (Dell E520 Intel Dual Core 4GB Ram), installed PHP (Apache was already present). Then installed MongoDB (yum install mongo-10gen mongo-10gen-server),

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I wanted to write custom target in NLog using this: https://github.com/nlog/nlog/wiki/How%20to%20write%20a%20Target and write my logs to MongoDB, so my code looks like this: namespace NLog . Mongo { [ Target ( "Mongo" )] public sealed class MongoDBNLogTarget : Target { ... protected override void Write ( NLog . LogEventInfo logEvent ) { Repository . Insert ( logEvent ); } } } and I imagine my NLog.config file should look like this: <? xml version = "1.0" encoding = "utf-8" ?> <nlog xmlns = "http://www.nlog-project.org/schemas/NLog

【MongoDB】mongo复制数据库和集合 1. 复制数据库 1.1 db.copyDatabase(fromdb,todb,fromhost,username,password,mechanism) 后面四个选项可选： username: 如果开启了验证模式，需要源DB主机上的MongoDB实例的用户名； password: 同上，需要对应用户的密码； mechanism: fromhost验证username和password的机制，有：MONGODB-CR、SCRAM-SHA-1两种。 1.2 db.runCommand() { copydb: 1, } fromhost: 可选，见1.1； slaveOK: 可选，设置为true，允许从secondary复制数据，此时fromehost必须被设置； username: 可选，见1.1； key: 对password的hash值 2. 复制Collection 2.1 runCommand db.runCommand({ }); db.runCommand({cloneCollection:"testdb.testcol", fromhost:"192.168.1.12:27017", query:{"age":{"gt":2}}}); 2.2 db.cloneCollection db.cloneCollection

1.前言 　　这几天使用mongo的时候遇到了一个异常：Invalid BSON field name $gte，该问题可能会有很多小伙伴会遇到，因此记录一下解决过程。起因是用JAVA翻译一个其他语言写的程序，需要在mongo中保存某次的查询条件，以便下次使用。但是保存的时候抛出了这个异常，原程序却没有问题，这个肯定和JAVA的实现有关，与mongo服务本身关系不大了。下面是一个简略的排查过程，纯文字，尽量会写的简洁些。 2.排查过程 　　1.定位异常抛出的位置： 　　　　该异常由AbstractBsonWriter的writeName方法抛出，其由FieldNameValidator进行校验，校验不通过就会抛出该异常。 　　　　分析：这个过程十有八九就是用于校验mongo的键名称了，作用应该和防止SQL注入一样，用于防止命令注入的。这个时候就要明确，这个不是mongo本身限制的，而是Java的mongo driver限制的，不然没道理其他语言能够插入。 　　2.确定FieldNameValidator的规则： 　　　　该接口有四个实现类： 　　　　　　CollectibleDocumentFieldNameValidator：为空，包含.，以$开头非$db,$ref,$id校验失败 　　　　　　MappedFieldNameValidator

db . runCommand ( { movePrimary : < databaseName > , to : < newPrimaryShard > } ) 1 db.runCommand( { movePrimary: "myapp" , to: "mongodb1" }) 这次就不是立即返回了，需要很久，然后会返回如下： 1 { "primary" : "mongodb1" , "ok" : 1 } 4、最后的清理 上面步骤都完成后，还需要再执行一次RemoveShard，清理残余数据。 1 db.runCommand( { removeshard: "mongodb0" } ) 执行成功后，会如下结果： 1 { msg: "remove shard completed succesfully" , stage: "completed" , host: "mongodb0" , ok : 1 } 显示completed后，就可以安心的关闭mongod的进程了。 转载请标明出处: mongo 数据库移动指定分片 文章来源: mongo 数据库移动指定分片

1、下载MongoDB（32位） wget http://fastdl.mongodb.org/linux/mongodb-linux-i686-2.0.3.tgz 2、安装MongoDB（安装到/usr/local） 复制代码 tar zxvf mongodb-linux-x86_64-2.4.9.tgz mv mongodb-linux-x86_64-2.4.9 mongodb cd mongodb mkdir db mkdir logs cd bin vi mongodb.conf 复制代码 dbpath=/usr/local/mongodb/db logpath=/usr/local/mongodb/logs/mongodb.log port=27017 fork=true nohttpinterface=true 3、重新绑定mongodb的配置文件地址和访问IP /usr/local/mongodb/bin/mongod --bind_ip localhost -f /usr/local/mongodb/bin/mongodb.conf 4、开机自动启动mongodb vi /etc/rc.d/rc.local /usr/local/mongodb/bin/mongod --config /usr/local/mongodb/bin/mongodb.conf 5