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MONGODB QUESTIONS

Building MongoDB query with conditions
Building MongoDB query with conditions
help you fix your problem Since you are writing Javascript, you can create a "base" update object, and then add the $push property if you need:
TAG : mongodb
Date : January 12 2021, 09:11 PM , By : user3100583
confluentinc/kafka-connect-datagen:latest' returned a non-zero code: 7
confluentinc/kafka-connect-datagen:latest' returned a non-zero code: 7
I hope this helps you . It looks like that you have a problem with hostnames resolution. It should be resolved to valid host name - check it with nslookup command, like this:
TAG : mongodb
Date : January 12 2021, 07:00 PM , By : Sudir
How to filter a sub array but keep the root content?
How to filter a sub array but keep the root content?
This might help you Using mongo 3.6 , The following query can get us the expected output:
TAG : mongodb
Date : January 11 2021, 02:18 PM , By : user3098606
Use of $sum inside set - Mongodb
Use of $sum inside set - Mongodb
To fix this issue You can use aggregate() with $out to do that:
TAG : mongodb
Date : January 11 2021, 11:39 AM , By : user3098526
How can I restore docker data after stopping the container?
How can I restore docker data after stopping the container?
To fix this issue So the answer is no. The temporary volumes are stored in the /var/lib/docker/containers/$container_id and will be removed after the docker rm command
TAG : mongodb
Date : January 10 2021, 02:04 PM , By : user3098047
Mongo unique compound text index
Mongo unique compound text index
it helps some times A text index actually behaves a bit like a multikey index, it tries to cut text into bits that can be then queried using specific text search operators. Also, the order of the fields in the text index doesn't really matter (compar
TAG : mongodb
Date : January 10 2021, 02:04 PM , By : user3097933
Difference operation on collection
Difference operation on collection
Does that help We have the following collections: , I believe this does the trick:
TAG : mongodb
Date : January 08 2021, 10:52 AM , By : sarath
Filter by multiple sub-document keys
Filter by multiple sub-document keys
Hope that helps The following document was expected to be trapped by the filter applied below - but it does not. , Two things here:
TAG : mongodb
Date : January 07 2021, 03:08 PM , By : user3096805
How to find the data inside of array using mongoose
How to find the data inside of array using mongoose
may help you . The easy way is to find the aggregate of name and check if the count is greater than one. Since it is inside the the array we need to unwind it.The below query works, to detect if a sub document contain duplicates for each document.
TAG : mongodb
Date : January 07 2021, 07:50 AM , By : Vince
How do you validate password using mongoose for mongoDB in an express app for logging in a user?
How do you validate password using mongoose for mongoDB in an express app for logging in a user?
I hope this helps . I am trying to have a user log in by their email and password. MongoDb docs shows hashing the password with bcrypt in the user model. It also provides a nice way to validate the password in the model as well. My problem is how to
TAG : mongodb
Date : January 06 2021, 03:17 PM , By : user3096207
Can we create an index on a Switch... Case in MongoDB
Can we create an index on a Switch... Case in MongoDB
This might help you A $switch case cannot be directly indexed. Index usage by aggregation framework operations is described here. Most importantly:
TAG : mongodb
Date : January 03 2021, 08:18 AM , By : user3095536
Check if MongoDB mutation will succeed without actually executing it
Check if MongoDB mutation will succeed without actually executing it
I hope this helps you . If you're using MongoDB 4.0 or newer, you can use transactions to simulate a dry run. Something like:
TAG : mongodb
Date : January 02 2021, 10:54 PM , By : user3095314
What is MongDB (WiredTiger) update query's default lock wait time?
What is MongDB (WiredTiger) update query's default lock wait time?
To fix this issue Internally, WiredTiger uses an optimistic locking method. This means that when two threads are trying to update the same document, one of them will succeed, and the other will back off. This will manifest as a "write conflict" (see
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : user6038508
MongoCollection.find() does search twice?
MongoCollection.find() does search twice?
this one helps. I am using the code snupped as below : , Why not store the find result and then use the store variable
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : making_mischief
How to retrieve a mongo collection matching the array items in any order?
How to retrieve a mongo collection matching the array items in any order?
I wish this helpful for you First of all, the collection you have specified while describing the document and the collection on which you are querying are different.Moving forward, you can use $all operator for your query.
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : tygertec
How to find document that contains array with two equal values?
How to find document that contains array with two equal values?
I hope this helps . you can achieve this with the aggregation framework, using a $group stage. First, group by chat._id and use $addToSet to keep only unique users in a new array, ant then add a filter to keep only the documents with one participant:
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : John Saunders
Mongodb running ordinary sql
Mongodb running ordinary sql
may help you . SQL is a domain-specific language used in programming and designed for managing data held in a relational database management system (RDBMS)
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : Seiidkhan Dzhursumb
ObjectIDs and uniqueness within a collection
ObjectIDs and uniqueness within a collection
hope this fix your issue As per the documentation of mongodb ObjectID:
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : Bruno Rodrigues
MongoDB 4.x Real Time Sync to ElasticSearch 6.x +
MongoDB 4.x Real Time Sync to ElasticSearch 6.x +
Hope this helps There is tool called Monstache for migrating teh MOngoDB data to ElasticSearch in real time. Its a go daemon that syncs mongodb to elasticsearch in realtime. Its the Monstache. Its available at : Monstache The monstache required mongo
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : Mintu
Readiness probe failed: MongoDB shell version v4.0.10
Readiness probe failed: MongoDB shell version v4.0.10
Any of those help I was observing the same error, once I've increased initialDelaySeconds: value to some higher number in Readiness probe spec inside deployment, the issue has gone and mongodb Pod has been spawned without error. Actually, it takes so
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : Carlos Fernando
Mongo DB Atlas. Is it safe to whitelist all ip because someone attempting to access the database needs a password
Mongo DB Atlas. Is it safe to whitelist all ip because someone attempting to access the database needs a password
fixed the issue. Will look into that further I have a google app engine with my express server. I also have my db in MongoDB Atlas. I currently have my MongoDB Atlas whitelisting all ip. The connection string is in the code for my express server runn
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : Lovely Grace Hernand
Can't solve MongoParseError: Invalid connection string
Can't solve MongoParseError: Invalid connection string
around this issue Looking through the guide on managing secrets in docker compose, it looks like any secrets are passed into the container as a file mounted in /run/secrets/SECRET_NAME, and the suggestion is to pass the path to this file as an enviro
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : 李千勇
Is it compulsory to install add-on in order to deploy Mongo in Heroku?
Is it compulsory to install add-on in order to deploy Mongo in Heroku?
With these it helps As long as there's a way to connect to your MongoDB instance from Heroku, you don't have to install a Heroku add-on. Set an environment variable (using heroku config) that your code can use to make a connection.
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : Shelley Bassett
I want to connect my MongoDB docker to my host pc
I want to connect my MongoDB docker to my host pc
I wish this helpful for you You need to use below host port in your python program which resides on docker host -
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : chahreddine ettiss
exception in initAndListen: NonExistentPath: Data directory /data/db not found., terminating
exception in initAndListen: NonExistentPath: Data directory /data/db not found., terminating
seems to work fine I ran into this same issue a few days ago. I am using Mac OS. Apparently, there was a permission problem with having my data directory in the root of my home folder. So what i did was i just created a directory in a folder in a loc
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : Chad Harris
MongoDb. Flatten inner array
MongoDb. Flatten inner array
help you fix your problem You can use below aggregation using $reduce operator
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : Guadalupe Camacho
Mongo db - Querying documents using nested field (nested array and objects)
Mongo db - Querying documents using nested field (nested array and objects)
To fix the issue you can do Dot notation works fine here, it will return the document if serviceTask contains at least one action set to getEmployeeData
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : Oro
How can i setup multitenant in NESTJS
How can i setup multitenant in NESTJS
like below fixes the issue We also have a Mulit-Tenancy Setup for our NestJS Setup. You could have a middleware that decides, depending on the request, which datasource to use. In our example we are using TypeORM which has a pretty good integration i
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : Ahmed Salama
How to use OR condition in mule dataweave for reading data from mongodb
How to use OR condition in mule dataweave for reading data from mongodb
I hope this helps you . Mule 3.8.5 + Data-weave code query :- , You can use default:
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : Patricio Ferraggi
stable/mongodb helm chart authentication issue with replicaset set true
stable/mongodb helm chart authentication issue with replicaset set true
I think the issue was by ths following , I am able to resolve this issue for authentication after deleting pv and Azure Disk. I also used release-name-mongodb instead of release-name-mongodb-headless
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : Hechu Mahesh
Has anyone used an object database with a large amount of data?
Has anyone used an object database with a large amount of data?
fixed the issue. Will look into that further Someone just went into production with a 12 terabytes of data in MongoDB. The largest I knew of before that was 1 TB. Lots of people are keeping really large amounts of data in Mongo.It's important to reme
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : Omar Mohammed
using referenced id as a primary id
using referenced id as a primary id
Any of those help I believe in your case you might want to have a look how you should design your schema in MongoDB.In classic SQL databases, you may always try to normalize your data, separating tables and makes relations.
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : user3095068
MongoDB Replace _id field with existing field Id
MongoDB Replace _id field with existing field Id
I hope this helps . For mongo version 4.0.10, the following query can get us the expected output:
TAG : mongodb
Date : January 02 2021, 06:48 AM , By : user3094945
dateFromString not covering valid date
dateFromString not covering valid date
Does that help I had to add this to my test data: var ISODate = require('isodate');ISODate("2019-08-13T17:54:00.800Z"),
TAG : mongodb
Date : January 02 2021, 06:36 AM , By : user3094697
Mongodb 2 sequentially queries to 1 collection with limit
Mongodb 2 sequentially queries to 1 collection with limit
Hope this helps You can use $facet to achieve this like the following aggregate query:
TAG : mongodb
Date : January 02 2021, 06:32 AM , By : Phlat
How to write these queries in Mongo shell?
How to write these queries in Mongo shell?
Hope that helps You don't necessarily need to write two queries for this, just a single pipeline with multiple stages that shape the two results you want.In your pipeline, you need the first step as the $match pipeline stage which will filter the doc
TAG : mongodb
Date : January 02 2021, 05:34 AM , By : user3094193
Having trouble writing a MongoDB aggregation query that requires the use of grouping
Having trouble writing a MongoDB aggregation query that requires the use of grouping
I wish this help you I have a collection that stores user activity data pertaining to whether users up vote or down vote on a select list of keywords as they relate to a catalogue of titles. I need to execute an aggregation query in Mongo that gives
TAG : mongodb
Date : January 01 2021, 06:10 PM , By : user3093093
How to do multiple joins between two collection in mongodb using lambda function?
How to do multiple joins between two collection in mongodb using lambda function?
like below fixes the issue I have two collections 1) user_posts 2)user_profile. find the below collection data for your reference. , Please check this:
TAG : mongodb
Date : January 01 2021, 06:46 AM , By : user3091294
adding referenced ObjectId to a document in studio/robo 3t
adding referenced ObjectId to a document in studio/robo 3t
will be helpful for those in need Studio 3T currently doesn't offer this feature, but we're always open to suggestions and ideas for future updates. We recommend you share any thoughts with us in this link: https://3t-io.uservoice.com/forums/265122-s
TAG : mongodb
Date : January 01 2021, 06:44 AM , By : Troubled Naveen
filter document in mongo
filter document in mongo
help you fix your problem We have a collection of employees: , The regex can be applied to a string field in the following ways:
TAG : mongodb
Date : January 01 2021, 06:35 AM , By : dvc0pe
Mock a mongoose document in Nestjs
Mock a mongoose document in Nestjs
Does that help You mocked the getFund method in the wrong way. Here is the correct way to mock getFund method, you need to use jest.fn method to mock the method.
TAG : mongodb
Date : December 31 2020, 08:18 AM , By : a.gomezmart
Error when creating a mongodb replicaset - shows unrecognized option '--smallfiles'
Error when creating a mongodb replicaset - shows unrecognized option '--smallfiles'
I hope this helps you . --smallfiles is not supported in newest mongo (4.2) you can check it in doc, you are not specifying image tag so newest latest is pull in this case mongo 4.2. If you set image: mongo:4.0 your configuration should be correct.
TAG : mongodb
Date : December 31 2020, 08:18 AM , By : user3090360
Cannot connect with mongodb through doctrine
Cannot connect with mongodb through doctrine
Any of those help The problem was indeed in my docker compose file, I didnt connect both dockers with network, thanks for help @BrucieAlpha
TAG : mongodb
Date : December 31 2020, 03:06 AM , By : user3089864
How to use a field's value as an array index in $addFields stage (aggregation)
How to use a field's value as an array index in $addFields stage (aggregation)
This might help you In order to modify multiple nested arrays, the one of the approach is to $unwind them, modify the data as your requirement and finally aggregate the unwinded data.
TAG : mongodb
Date : December 31 2020, 03:02 AM , By : user3089386
How do i restore old MongoDB files? (extensions end with numbers)
How do i restore old MongoDB files? (extensions end with numbers)
wish of those help It should be possible to just start up a mongod instance while specifying the path to the files in question:
TAG : mongodb
Date : December 28 2020, 02:06 PM , By : epersales
MongoDb documents join with inner objects
MongoDb documents join with inner objects
wish helps you Ok, this is what you're looking at :If your locationId in calls has only one matching customer.locations._id in customer :
TAG : mongodb
Date : December 27 2020, 04:51 PM , By : user3086101
Which MongoDB indexes should be created for different sorting and filtering conditions to improve performance?
Which MongoDB indexes should be created for different sorting and filtering conditions to improve performance?
this one helps. Firstly, in MongoDB (Refer: https://docs.mongodb.com/manual/reference/limits/), a single collection can have no more than 64 indexes. Also, you should never create 64 indexes unless there will be no writes or very minimal.Is it possib
TAG : mongodb
Date : December 27 2020, 04:28 PM , By : user3085180
Date range not working in aggregation pipeline, but works in find()
Date range not working in aggregation pipeline, but works in find()
it fixes the issue I am trying to filter data by a date range. Example return the data that was created no more than 14 days ago. , I was able to get it working via toDate:
TAG : mongodb
Date : December 27 2020, 04:28 PM , By : user3085052
Combining Two Arrays Inside a Document
Combining Two Arrays Inside a Document
help you fix your problem I need to join 3 collections.Teams,Schedule_Results,Stadiums. I have Data Files as TEAM(TeamID, Team, Continent, League, Population) SCHEDULE_RESULTS(GameID,MatchType,MatchDate,SID,TeamID1,TeamID2,Team1_Score,Team2_Score) ST
TAG : mongodb
Date : December 27 2020, 04:18 PM , By : retrobits
Is there a way to 'remove' a field during a mongo aggregation?
Is there a way to 'remove' a field during a mongo aggregation?
this one helps. Use a $project stage in your pipeline. You have two options available to you when using a projection.The first is you can whitelist the returned fields by specifying the fields you want to include with a value of 1. The projection sta
TAG : mongodb
Date : December 27 2020, 03:57 PM , By : user3084385
How to add elements to an array on a 'root' in Mongo
How to add elements to an array on a 'root' in Mongo
With these it helps In mongo I am constantly collecting data as I execute queries and then use group to keep track of the attributes I need to maintain. In my case a patient record that has lots of data and then when I get medications I then have to
TAG : mongodb
Date : December 27 2020, 03:51 PM , By : Mokupuni
Group documents by value from another field
Group documents by value from another field
help you fix your problem I have documents in the format of , Please try this :
TAG : mongodb
Date : December 27 2020, 03:39 PM , By : SimonLiang
Get $concatArray result in single array without _id grouping?
Get $concatArray result in single array without _id grouping?
To fix the issue you can do To use $concatArrays you need to put it into the $project pipeline otherwise mongoDB will not recognize $concatArrays as it is not an pipeline stage of mongoDB.Try this query, after adding $unwind and $group stage it might
TAG : mongodb
Date : December 27 2020, 02:42 PM , By : user3082114
match where array contains the value
match where array contains the value
this one helps. In aggregate try $in and make sure userId is ObjectId, I think the main issue of your aggregate pipeline maybe userid is in the string but aggregate needs mongoose object id to work try below:
TAG : mongodb
Date : December 26 2020, 03:01 AM , By : kenneth-nlogn
Sort by sum of value property (if it is equal true) of Map Object in mongo db query
Sort by sum of value property (if it is equal true) of Map Object in mongo db query
this will help If you have a hashmap field then it would be better to convert the hashmap to an array of key value field pairs using $objectToArray. Armed with this array, $filter on the true elements and then get the $size of the filtered array that
TAG : mongodb
Date : December 26 2020, 02:01 AM , By : user3081402
Sync two offline masters when network available
Sync two offline masters when network available
may help you . I believe you're overthinking things. Here's what I would do if faced with a similar situation:From the description, it doesn't sound like the two sites need to be connected in real time at all. I would create a server on Entry A, anot
TAG : mongodb
Date : December 26 2020, 01:30 AM , By : user3081120
Count documents by the average of its fields in Mongodb
Count documents by the average of its fields in Mongodb
I hope this helps you . You can use $addFields and $let to define "label" for every student. To apply conditional logic you can take advantage of $switch or double $cond. Then you need to run $group to count them and also you can use $push to get ent
TAG : mongodb
Date : December 26 2020, 12:01 AM , By : zaithua9x
mongodb: find all records by condition in other documents
mongodb: find all records by condition in other documents
like below fixes the issue Not sure how to formulate the task correctly in words. , You can use below aggregation
TAG : mongodb
Date : December 25 2020, 11:30 PM , By : user3080233
How to move an array of embedded docs up to parent and change key/value with aggregation pipeline
How to move an array of embedded docs up to parent and change key/value with aggregation pipeline
this will help You need $replaceRoot and $mergeObjects to create a new document root which contains both _id and other fields. You also can run $arrayToObject to transform an array into single document, try:
TAG : mongodb
Date : December 25 2020, 10:30 PM , By : user3079672
Mongodb- Query documents between two timestamp
Mongodb- Query documents between two timestamp
it should still fix some issue Since the timestamp is present as String in DB, we need to query it in the string range and not numeric. The following query can get you the expected output:
TAG : mongodb
Date : December 25 2020, 10:30 PM , By : user3068962

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