这是我的收藏品的样子：db.students.find({_id:100}).pretty() {"_id" : 100,"name" : "Demarcus Audette","scores" : [{"type" : "exam","score" : 30.61740640636871},{"type" : "quiz","score" : 14.23233821353732},{"type" : "homework","score" : 31.41421298576332},{"type" : "homework","score" : 30.09304792394713}] }我在Mongo shell上执行以下2个查询：x=db.students.aggregate( [{ "$unwind":"$scores" },{"$match":...
警告：我是新手程序员(更多的是sysadmin).我们得到了一个使用MongoDB的节点js应用程序.据我所知,mongo.js文件使用的是mongojs和monq java类.它只设置了一个MongoDB,我正在尝试设置一个新的HA环境来使用副本集.以下是他们提供的内容：var mongojs = require('mongojs'); var monq = require('monq'); var dbName = 'exampledb'; var db = mongojs(dbName, ['collections']); var client = monq('mongodb://127.0.0.1/exampledb', { ...
//数据同步public function data_Sync(){$filter = [];$options = [ 'projection' => ['_id' => 0]];//排除字段 先去掉_id// 查询数据$query = new \MongoDB\Driver\Query($filter, $options);$cursor = $this->mongodb->executeQuery('test.mydata', $query);$cursor = $cursor->toArray();//tp5函数转一次foreach ($cursor as $key=>$value){$value = ((array)$value);//直接强转array类型$res = Db::name('sreadreport')->ins...
当我尝试从PHP向MongoDB插入空关联数组(hashmap / dictionary / dict / {})时,它总是作为非关联空数组(list / [])插入.我可以强制关联数组吗？ 例：$m = new Mongo('mongodb://localhost:27017'); $db = $m->selectDB('test'); $collection = $db->selectCollection('test');// 1: inserts [] $d = array( 'x' => array() ); $collection->insert($d);// 2: inserts [] $d = array( 'y' => array('a'=>'123') ); unset($d['y']['a'...
我的mongo集合具有以下格式的条目{"myobj" : {"objList" : [{ "location" : "Texas" },{ "location" : "Houston"},{ "name":"Sam" }]}, "category" : "cat1" }{ "myobj" : {"objList" : [{ "location" : "Tennesy" },{ "location" : "NY"},{ "location" : "SF" }] }, "category" : "cat2"}我想提取位于“休斯顿”的“**类别**”.在简单的JSON对象的情况下,我必须将其作为查询传递,如：BasicDBObject place = new BasicDBObject()...
我正在尝试通过Java API在MongoDB上执行查找后对值进行排序.结果列表包含以下条目：{ "_id": "P17-223", "property": "P17", "itemid": 223, "labels": [{"language": "en","value": "Greenland"},{"language": "es","value": "Groenlandia"},{"language": "de","value": "Gr?nland"} ]} 我想按数组标签的第一个条目排序：DBCursor cursor = getCollection().find(query);BasicDBObject orderBy = new BasicDBObject("labels[0].va...
我知道有很多问题,并且答案很好.问题是所有这些问题都使用MongoDBObject,MongoDBList来检索数组.我的问题是我使用http://api.mongodb.org/java/3.0/index.html?overview-summary.html api,我很难检索数组并添加元素.我必须使用MongoCollection,MongoDatabase和MongoClient.我正试图解决mongodb课程的作业.问题陈述是找到一个数组并在mongod中更新它. 这是我尝试过的Document post = null; Bson filter = new Document("permalink",...
在我的项目中,我使用的是SpringBoot 1.3.2和org.springframework.data.mongodb.core.query.* 我正在尝试更新数组中的元素,在我的主对象中我有这样的数组："sections" : [{"sectionId" : "56cc3c908f5e6c56e677bd2e","name" : "Wellcome"},{"sectionId" : "56cc3cd28f5e6c56e677bd2f","name" : "Hello my friends"} ]使用Spring我想用sectionId 56cc3c908f5e6c56e677bd2e更新记录的名称 我试图这样做,但它不起作用Query query = Que...
我正在寻找一种方法来搜索具有以下结构的“answers”文档数组中的关键字(例如“Henrik”)Array ( [_id] => MongoId Object([$id] => 4eeedd9545c717620a000007)[formId] => 6 [respId] => 4eeedd95c93228 [dateCreated] => 2011-10-14 07:45 [answers] => Array([field1] => Henrik[field6] => myemail@domain.com[field7] => my city address))我在这个项目上使用PHP工作,当然这样查询：$answers = $collection->find( array('for...
我有JSON喜欢：{ “_id” : “1”, “_class” : “com.model.Test”, “itemList” : [{ “itemID” : “1”, “itemName” : “Foo”,“resources” : [ { “resourceID” : “1”, “resourceName” : “Foo Test1”, }, { “resourceID” : “2”, “resourceName” : “FooTest2”, } ] } ] }我需要能够更新资源列表.我做了以下事情：BasicDBObject updateQuery = new BasicDBObject();updateQuery...
我有一个mongodb对象如下：array ('_id' => new MongoId("4cc97fb0247ae8747ec5fefb"),'posts' => array (0 => array ('comment' => 'Eamorr','fromUname' => 'Eamorr','time' => 1288273840,'UTC' => '2010-10-28T14:50:40+01:00','ip' => '127.0.0.1','id' => '123lasdfiqwoei28asdf',),1 => array ('comment' => 'Hello','fromUname' => 'Eamorr','time' => 1288277023,'UTC' => '2010-10-28T15:43:43+01:00','ip' => '127.0.0....
大家好我想尝试使用mongodb java驱动程序匹配文档,例如：{"fName" : "abc","lName" : "456","dob" : "00","address" : "xyz"}同"nameIdentity" : [{"fName" : "abc","lName" : "def","dob" : "00","address" : "xyz"},{"fName" : "123","lName" : "456","dob" : "00","address" : "789"}如果我找到了该文件,那么我不做任何其他事情添加文件.我的问题是如果我的源文档包含fname：abc和lname：456这是第一组nameIdentity中的fname和第...
假设我在mongo DB中有一个文档,如下所示：{pages: [{elements: [{id:1},{id:2},{id:3}]},{elements: [...]}] }并且页面内元素的顺序具有语义含义(例如,堆叠).现在说我想在第一页的第二个元素之前添加一个新元素.生成的文档的所需状态是这样的：{pages: [{elements: [{id:1},{id:4}, // <------ element inserted here{id:2},{id:3}]},{elements: [...]}] }在Mongo docs中,我看到如何将元素添加到数组的末尾以及如何更新现有元素的值...
目前我正在使用C#开发一个应用程序,我想在MongoDB集合中添加一些数据.我正在尝试将一个数组添加到Employee对象,但我正在努力让它正常工作. 当我查看其他帖子时,我遇到了使用BsonDocument的语法,如下所示：var document = new BsonDocument { { "author", "joe" }, { "comments", new BsonArray {new BsonDocument { { "author", "jim" }, { "comment", "I disagree" } },new BsonDocument { { "author", "nancy" }, { "comment", "...
我按照预期在mongo shell上运行以下查询.db.getCollection('personnels').update({_id: ObjectId("55f6728b9d73a15807885de8"), "Devices._id":ObjectId("55fa5f7ac9e7863a3836e331")}, {$pull:{ "Devices.$.DeviceCloudFolders": { "CloudFolderId": ObjectId("5615124b06275f072040c4f1")}}} );这是我的文档结构：{"_id" : ObjectId("55f6728b9d73a15807885de8"),"FirstName" : "Tolga","Devices" : [ {"_id" : ObjectId("55fa5f...