mongodb-query

问题 I'm trying to do a query(In MongoDB) in array("availability") that will return a only hotel that have the element("available") equals 1 and between the dates inside the availability. But the query return all hotels when the correct return is "Mercato Hotel" Query that i have used without success: {city: "Boston", availability: { $elemMatch: {availability: 1, date: {$gte: ISODate("2015-05-02T00:00:00.000+0000")}, date: {$lte: ISODate("2015-05-04T00:00:00.000+0000")}}}} Json in MongoDb: { "_id"

问题 I've got a specific use case and I'm trying to find a way to do it in one aggregation pipeline and preferably without the need to hardcode any data values. I want to group documents based on one property and see a count of values for a particular field within the document. Example data: { "flightNum": "DL1002", "status": "On time", "date": 20191001 }, { "flightNum": "DL1002", "status": "Delayed", "date": 20191002 }, { "flightNum": "DL1002", "status": "On time", "date": 20191003 }, {

问题 I have this query but i´m getting a syntax error: unexpected identifier mongoexport --db ium --collection events \ --query 'db.events.find({'created_at' : { $gte: ISODate("2016-03-01T00:00:00.001Z"), $lte: ISODate("2016-03-29T23:59:59:59.000Z") }, "name" : "UPDATE_SUCCESS"})' \ --out guille1_test.json what can it be wrong? 回答1: You need to use "extended json" in queries with mongoexport. So the way to specify "dates" is with $date instead. And the --query is just the "query string" in JSON

问题 i want to get retrieve the most data of city, example only city of jakarta and bekasi will be show, because the most data total of count city. and can use how many dynamically limitation. Link example : MongoPlayground Input [ { "_id": ObjectId("5dcbb949e7599115cf1b9441"), "date": "2019-11-13T15:05:28.379Z", "id": NumberInt(166), "location": { "city": "Bekasi", "country": "Indonesia", "district": "Jatimulya", "latitude": -6.266871666666666, "longitude": 107.01972499999998, "province": "Jawa

问题 I have found several example at StackOverFlow related to addFields in Aggregation. But no one implemented in Java. db.getCollection('myDocument').aggregate([ {$match : {"metaId.ref.uuid" : "d6112808-1ce1-4545-bd52-cf55bc4ed25e"}}, {$lookup: {from: "simple", localField: "someId.ref.uuid", foreignField: "uuid", as: "simple"}}, {"$unwind": "$simple"}, {"$addFields": { "metaId.ref.name" : "$simple.name" }} ]) I am not able to Implement In Java Correctly:-- Not getting proper procedure

问题 I have found several example at StackOverFlow related to addFields in Aggregation. But no one implemented in Java. db.getCollection('myDocument').aggregate([ {$match : {"metaId.ref.uuid" : "d6112808-1ce1-4545-bd52-cf55bc4ed25e"}}, {$lookup: {from: "simple", localField: "someId.ref.uuid", foreignField: "uuid", as: "simple"}}, {"$unwind": "$simple"}, {"$addFields": { "metaId.ref.name" : "$simple.name" }} ]) I am not able to Implement In Java Correctly:-- Not getting proper procedure

问题 I have a document with "test" filed as NumberDecimal type { "_id" : ObjectId("5d1a202e476381c30cd995a4"), "test" : NumberDecimal("0.1") } How to convert "test" field from NumberDecimal to Double in mongodb shell? I tried execute db.collection.find({"test": {$exists: true}}).forEach(function (x) { x.test = parseFloat(x.test); db.collection.save(x); }); but don't solve this problem because it return NaN 回答1: The decimal type is not native to JavaScript, so NumberDecimal values in the shell are

问题 I want to make an upsert call to update as well as insert my data in nested array of mongo db. This is my mongo document. { "_id" : "575", "_class" : "com.spyne.sharing.SpyneShareUserProject", "spyneSharePhotoList" : [ { "_id" : "fxLO68XyMR", "spyneShareUsers" : [ { "_id" : "chittaranjan@eventila.com", "selectedByClient" : false }, { "_id" : "chittaranjan@gmail.com", "selectedByClient" : false } ] }, { "_id" : "nVpD0KoQAI", "spyneShareUsers" : [ { "_id" : "chittaranjan@eventila.com",

问题 I want to make an upsert call to update as well as insert my data in nested array of mongo db. This is my mongo document. { "_id" : "575", "_class" : "com.spyne.sharing.SpyneShareUserProject", "spyneSharePhotoList" : [ { "_id" : "fxLO68XyMR", "spyneShareUsers" : [ { "_id" : "chittaranjan@eventila.com", "selectedByClient" : false }, { "_id" : "chittaranjan@gmail.com", "selectedByClient" : false } ] }, { "_id" : "nVpD0KoQAI", "spyneShareUsers" : [ { "_id" : "chittaranjan@eventila.com",

问题 I have a mongodb collection called cases and inside cases I have an array of cases per company object. So the structure is: Inside each case I want to use the createddate (which is a string) and endDate (also string) and convert it to a mongodb date. When I use NoSQLBooster I add the following query: db.cases.aggregate([ { $match: { companyID: 218 }}, { $unwind: "$cases" }, { $match: { 'cases.id': '299' }}, { $addFields: { 'cases.created': new Date('2010-06-21T00:00:00.000'), 'cases.closed':