Recent questions tagged MongoDB

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mongodb - Getting "err" : "E11000 duplicate key error when inserting into mongo using the Java driver

Exception in thread "main" com.mongodb.MongoException$DuplicateKey: { "serverUsed" : "localhost/127.0.0.1: ... myIdMapCollection.insert(myObj); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - Mongo find documents that do not contain a given value (using $not)

I have two items in MongoDB: {'title':'active item', 'tags':[ {'tag':'active'}, {'tag':'anothertag'} ... contain a given value in their tags? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - Get first element in array and return using Aggregate?

How can I get and return the first element in an array using a Mongo aggregation? I tried using this code: ... need to return the first element. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - Rails & Mongoid unique results

Consider the following example of mongo collection: {"_id" : ObjectId("4f304818884672067f000001"), "hash" : {" ... 'hash.call_id')) Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - Mongoose (node.js module) causes high CPU usage

I'm using nodetime to analyze the high CPU usage of my node.js app. Over 30% of the CPU usage is coming from ... lots of CPU in the process). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - Export one object with mongoexport, how to specify _id?

I'm trying to export just one object with mongoexport, filtering by its ID. I tried: mongoexport -d " ... work in the mongoexport query. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - how to execute mongo admin command from java

I want to execute soem admin command with parameters from java. The commands are: { enablesharding : "test" } { ... key:"number":1} }") See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - Mongo aggregation Match multiple values

I have following documents { name: 'John', Address :'street 1 ' }, { name: 'Jane', Address :'street ... possible to get document like this way? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - Aggregate $lookup does not return elements original array order

The query returns the order in which elements are placed in their collection, ignoring the order of the initial ... the original arrays order? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - Mongo query using mongoid in rails app causing cursor timeout error

I have a mongo query in my rails app that is timing out because the collection is huge. FbCheckin.where ... cursor timing out beforehand? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - Mongoose unique index on subdocument

Let's say I have a simple schema: var testSchema = new mongoose.Schema({ map: { type: [ mongoose. ... Why can I push conflicting subdocuments? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - Embedded document without Array?

I understand how to embed documents in Mongoose, and they seem fairly straightforward if storing as arrays, for which ... need or want an array. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - MongoParseError: options useCreateIndex, useFindAndModify are not supported

I tried to run it and it said an error like the title. and this is my code: const URI = process.env ... =true&w=majority how to fix it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - Mongoose findOneAndUpdate Upsert _id null?

I'd like to have a single method that either creates or updates a document for a policy. Searching and trying ... null when its not an update? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - How to use $elemMatch on aggregate's projection?

This is my object: { "_id" : ObjectId("53fdcb6796cb9b9aa86f05b9"), "list" : [ "a", "b" ], "complist" ... there a better way to accomplish this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - How to use spring data mongo @CompoundIndex with sub collections?

Assume that I have such entities like the following: @Document(collection = "doc_a") public class A { @Field("id") ... id'}") Thanks in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - How to use spring data mongo @CompoundIndex with sub collections?

Assume that I have such entities like the following: @Document(collection = "doc_a") public class A { @Field("id") ... id'}") Thanks in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

1 answer

mongodb - How to use spring data mongo @CompoundIndex with sub collections?

Assume that I have such entities like the following: @Document(collection = "doc_a") public class A { @Field("id") ... id'}") Thanks in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.6k views

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mongodb - Difference between decorating a property in C# with BsonRepresentation(BsonType.ObjectId) vs BsonId vs ObjectId

Am new to mongodb and am liking how easy it is not to worry about schema stuff, I have a question ... how the flexibility helps. Thanks? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

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mongodb text search with multiple fields

I'm trying to get mongodb fulltext search with multiple fields working. I've set the index on 3 fields-name, ... but I couldn't find anything. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.6k views

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mongodb - pymongo auth failed in python script

I have installed mongodb and enabled auth. and its working find. I can connect it from remote notebook using ... in result: print document See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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mongodb - WiredTiger and in-place updates

I have a collection of users. Each user has a field "geoposition" that is updated quite often (every time the user ... MMAP). What did I miss? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - Set Mongo Timeout in Spring Boot

I am using spring boot web application which connects to mongo db which is working out of the box. I just ... doing it by declaring the Bean. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - mongod --bind_ip using docker-compose version 2

I'm trying to connect two mongodb containers running on docker using docker-compose. One container seed some data to ... ? What am I missing? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

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mongodb - Case Insensitive search with $in

How to search a column in a collection in mongodb with $in which includes an array of elements for search and ... those elements in the column ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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mongodb - Mongorestore, from meteor production server to local

I've found plenty of good instructions on how to use mongodump and mongorestore, to back up my meteor production ... 'm supposed to be doing. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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mongodb - how to use mongoimport with my meteor application database?

I'm able to use mongoimport to import csv data into a non-meteor mongodb database, but I can't figure ... it with the mongoimport command. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - How to use GridFS to store images using Node.js and Mongoose

I am new to Node.js. Can anyone provide me an example of how to use GridFS for storing and retrieving ... I need to directly access GridFS? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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