JavaScript Frameworks

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

I got a collection with documents such as those: { '_id': 0, 'pictures': [ … Read more Aggregate Multiple Arrays Into One Huge Array With Mongodb

I have a collection of Facebook Page Likes (titled pagelikes) that is stored in a Mongo database/JS… Read more Reshape Array That Is Stored In A Collection And Export To Csv

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?

I have a database in MongoDB like this {'productId' : 1, 'isVariant': 1, 'varia… Read more How To Return The Variant Values Of Each Product If That Product Is A Variant?

I am using MongoDB aggregation in meteor. I got duplicated data when subscribe multiple times. (The… Read more Got Duplicated Data When Subscribe Multiple Times