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Questions tagged [mongodb4.0]

USE ONLY IF YOUR QUESTION IS VERSION-SPECIFIC. For questions about MongoDB programming that are specific to version 4+ of the language. Use the more generic [mongodb] tag on all MongoDB questions.

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Dot notation in MongoDB InsertOne

While performing InsertOne in MongoDB (4.0.5) from PHP I get the following exception: [0] Detected unsupported PHP type for field path "context.trace.1.args.2": 7 According to the MongoDB documentation one is allowed to use dot notation in update…
Bart Gloudemans
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MongoDB add replica-set to external server by ip

I have created 3 Digitalocean droplet. By default, I choose Ubuntu 18.06 and MongoDB 4. Here I have 3 droplets by default MongoDB config and all are up. I have access to "mongo" shell for all of them. Now I want to run a replica-set setting by this…
Abdol Seed
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Can MongoDB changeStreams listen to system level collections?

With the limited documentation available on MongoDB changestreams which they introduced version 3.6 onwards, I am not able to conclude if MongoDB changestreams let us listen to system collection changes. Currently, I am interested in system.profile…
Hemant Patel
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Multi-document ACID transactions in Mongoid 7.0.1

Support for multi-document transactions are released recently with Mongo 4.0. With the release of Mongoid 7.0.1 (Mongo 2.6.1 driver), multi-document transactions seems to be supported on Rails now. However the documentation website for Mongoid is…
CyberMew
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TypeError: Cannot read property 'n' of undefined\n at result.toArray

I'm upgrading from mongodb 3.6 to mongodb 4.0 and have problem with aggregates (it seems). I've got this error: TypeError: Cannot read property 'n' of undefined\n at result.toArray …
Orelsanpls
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Rename database and indexes during mongorestore

I'm migrating data from a mongo 4.0 server to aws documentdb (docdb4.0 family), and I've run into the error createIndex error: namespace name generated from index name is too long which has been reported with some frequency. However, I have not seen…
jonesy
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Keep on getting MongoNetworkError connection 6 to xx.x.xx.xx:xxxxx closed

I keep on getting the below error in an AWS Lambda with Node.js 16 + MongoDB v4, this usually happens for a lambda that has high traffic, other lambdas seem fine with the current setup. MongoNetworkError: connection 6 to xx.x.xx.xx:xxxxx closed at…
Nicolae Maties
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Aggregate pipeline for updates not supported in Mongo 4.0

Here is an example of my data: { "_id" : ObjectId("6144f74c066fee820d28b34f"), "Login" : ISODate("2021-09-16T21:09:00.000Z"), "DiaryNotes" : [ { "Message" : "Metus tincidunt ultricies.", "Timestamp" :…
Ben Druitt
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How can I find documents which matching field and data perfectly(not same data order)

I'm begginer at mongoDB I want to get documents which matching perfectly in mongoDB. id 1 and id 5 document have same fields(but "favorite.foods.fastfood" array not same order). I mean, I want to get id 1 and 5 but not id 4. here are documents [ …
bob
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MongoDB - How to find for both string and string array

I'm a beginner at MongoDB. I want to find documents in MongoDB by favorite.foods. Here are documents { "_id":1, "favorite": { "color":"red", "foods":{ "fruits":"banana", "fastfood":["burger", "sandwich"] } } }, { …
bob
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Cannot use timestamp from oplog for filtering

I have a stream of oplog messages produced by MongoDB Kafka connector. I want to tell the connector to start producing messages from a given point in time. I can do it using pipelines [documented…
kabanek
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cannot filter with $match a node by another subnodes value in MongoDB

environment: Mongo 4.2.2. invoking from Compass 1.20.5 I did $unwind 2 elements of an array (of a single document) into 2 single documents: { { id: 1 }, { termTrg: { lang: "ara"} }, { sublangTrans: { lang: "apj"} } } and { {…
feder
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Failed: dbName.collectionName: error restoring from collectionName.bson: reading bson input: unexpected EOF

I have an error when try to restore a 32GB database in MongoDB. I've tried the following commands but none of them works: mongorestore --db prod --drop --dir backup-cloud-server/20200221020001/prod --batchSize=1 mongorestore --db prod --drop --dir…
Simoyw
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Mongo Write Client connection

What does the MongoDB_ActiveClientsWriting_ metric in mongostat refer to? If I am performing multiple writes from an application on the same connection - does it get audited as a single Active Client? In that case - does a connection indicate a…
IUnknown
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Filter out empty element documents

We have a shop collection as below. We need to return all UNIQUE 'shop' having NO batch as empty([]). Since this is a stage in the aggregation - it would not be able to avail of index. So we need to find the most efficient way to do the above. { …
IUnknown
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