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Showing posts with the label Aggregation Framework
Mongodb - Unwinding Nested Subdocuments

Mongodb - Unwinding Nested Subdocuments

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For the following dataset example: lists { _id: 1, included_lists: [ 2 ], items: [ 'i1' ]} … Read more Mongodb - Unwinding Nested Subdocuments
Possible To Compare Date Strings In Mongodb?

Possible To Compare Date Strings In Mongodb?

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I have a collection that contains documents with a date attribute like so: { title: 'whateve… Read more Possible To Compare Date Strings In Mongodb?
How To Get Data From Mongodb To Simple Array Using Node.js And Mongoose?

How To Get Data From Mongodb To Simple Array Using Node.js And Mongoose?

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Let's say this is my MongoDB schema: var shopSchema = new mongoose.Schema({ nameSho… Read more How To Get Data From Mongodb To Simple Array Using Node.js And Mongoose?
Aggregate Multiple Arrays Into One Huge Array With Mongodb

Aggregate Multiple Arrays Into One Huge Array With Mongodb

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I got a collection with documents such as those: { '_id': 0, 'pictures': [ … Read more Aggregate Multiple Arrays Into One Huge Array With Mongodb
Is It Possible To Use Query Projection On The Same Collection That Has A $elemMatch Projection?

Is It Possible To Use Query Projection On The Same Collection That Has A $elemMatch Projection?

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I understand that you can limit the items in a subcollection array using $elemMatch as a projection… Read more Is It Possible To Use Query Projection On The Same Collection That Has A $elemMatch Projection?
How To Find Documents With Exactly The Same Array Entries As In A Query

How To Find Documents With Exactly The Same Array Entries As In A Query

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I have documents in a collection, looking like this: [ { userId: 1, itemsIds: [399957190,… Read more How To Find Documents With Exactly The Same Array Entries As In A Query