Recent questions tagged MongoDB

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mongodb - Group array after unwind and match

I have a twice nested schema: mongoose.model('Team', mongoose.Schema( { players : [{ trikots : [{ isNew : ... array. How can I achieve that? 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 - Is it possible to get single result in aggregate?

Is it possible to get a single document on db.collection.aggregate like as in db.collection.findOne? 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 - Meteor, define collections dynamically

We are working on an app and need to be able to create new Mongo collections on the fly. ... dynamically create new meteor collections? 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 - Setting smallfiles option for controlling journaling doesn't control the size

I am using mongodb 2.0 for my development environemnt . i am starting mongodb with the following below configuration ... to a huge size ?? 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 - Need a workaround for lookup of a string to objectID foreignField

I'm new to mongodb and currently I'm facing this problem, db.medical_records.aggregate([ { "$group": { " ... on this problem, please help 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 Aggregation does not Filter by Input Date

I'm trying to build a aggregation query but when I use $match with dates, it doesn't work as I expect. If ... aggregate(). Thanks for your help! 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 construct and pass bson document - Go lang?

I am using Go and mongoDB in my project and mgo is to connect to connect MongoDB. I am having following ... suggestion or help will be grateful 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 - Upgrading older mongo database after unintentional mongo version upgrade

Is there any way to upgrade a mongo database after the mongodb package was unintentionally upgraded (3.4.9 -> 3 ... afresh is not an option. 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 - find the document from sub array?

I have a collection with documents that look like this: "awards" : { "oscars" : [ {"award": " ... or were nominated for best picture? 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 - error: type parameter `D` must be used as the type parameter for some local type

I'm using Nickel.rs with MongoDB to build a RESTful api. I'd like to implement a generic Responder for the ... but that produced the same error. 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 - Meteor mongo updating nested array

Example document: { "_id" : "5fTTdZhhLkFXpKvPY", "name" : "example", "usersActivities" : [ { "userId" : " ... will be really glad of help. 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 - Reading of DBname.system.indexes failed on Atlas cluster by mongobee after getting connected

I have a Jhipster Spring boot project. Recently I shifted from mlabs standalone sandboxes to Atlas cluster sandbox ... or Robo3T(mongo client) 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 - Remove Object from Nested Array by Multiple Criteria

I have this schema document in mongoDB: { "_id": UUID("cf397865-c000-4f51-8959-1aae84769706"), "CreationDateTime": ... "Distributions" : [],... 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 - Does the mongocli support a formula URL for Apple M1 chips?

As per the installation instructions, when running: brew tap mongodb/brew I get the following error: Error: ... making a mistake somewhere? 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 - Select nested fields in mongo db

I have a collection in mongodb where fields are nested under a language root: { en: { title: "eng title", ... dataURL" } } Is this possible? 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 - $nin with the $expr

I have a query to find if a user CreatedBy is in a SharedWith. I want to inverse the query to check if the ... "Name": "User003"}, ]} ] 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 - regex as $filter in projection

I'm trying to find (using a regexp) an array field and returns that element only This is my data [ { "_id": " ... ,d){ res.json(d); }); 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 - Meteor and DBRefs

I'm using meteor 0.3.7 in Win7(32) and trying to create a simple logging system using 2 MongoDB ... all items change theis name Regards See Question&Answers more detail:os...

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

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1.7k views

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mongodb - Filter the sub array of an array by some criteria

Hi have a document in the format : { "_id":"someId", "someArray":[ { "subId":1, "subArray":[ { "field1":"A", " ... .filterMe", "YES"]} }} }} ]); 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 drop index using Mongoose

Mongoose Imagdata.dropIndexes( { "image_id": 1 }, function(err){ if(err){ res.send("error"); } else{ res.send(" ... ". How to fix this issue... 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 - Combine full text with other index

I have a full text index and an index on a created date. My query on the date alone returns ... australorp theocracy Interprofessional crocus Carthal unmoveable repouss??￥???...

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

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1.3k views

1 answer

mongodb - Query nested elements from unknown number of arrays

Querying to get an element from an array that is nested in an object is not a big deal. But, when you have ... you should be able to modify 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 - How to call db.Collection.stats() from Mongo java driver

From Mongodb client, we can use db.Collection.stats() to get status of collections, such as: + Number of ... enough information for me. 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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1.1k views

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mongodb - Validating uniqueness of an embedded document scoped by its parent in mongoose

I have the following schema in mongoose: UserSchema = new Schema username: {type: String, required: true} ... sort of validation in mongoose? 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

1 answer

mongodb - Unexpected mongo exit code 100. Restarting

I was trying to run Meteor on my VPS and I was getting this error: Unexpected mongo exit code 100. Restarting. ... works. I do not get 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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1.1k views

1 answer

mongodb - apollostack/graphql-server - how to get the fields requested in a query from resolver

I am trying to figure out a clean way to work with queries and mongdb projections so I don't have to ... , thanks to the amazing community. 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

1 answer

mongodb - MongoError: Unrecognized pipeline stage name: '$addFields'

MongoError: Unrecognized pipeline stage name: '$addFields'. "mongoose": "^4.5.8" My sourcecode: Post.aggregate( [{ ... Date", default: ''} } See Question&Answers more detail:os...

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

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1.2k views

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mongodb - Spring Data Mongo - Perform Distinct, but doesn't wants to pull embedded documents in results

I'm developing Spring Boot and Spring Data Mongo example. In this example, I want to get the distinct departments only, but I ... : "A" } ] }, } See Question&Answers more detail:os...

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

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