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Showing posts with the label Aggregation Framework
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?
Got Duplicated Data When Subscribe Multiple Times

Got Duplicated Data When Subscribe Multiple Times

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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
Collect Distinct Field Names At Nested Level With Specific Condition

Collect Distinct Field Names At Nested Level With Specific Condition

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I have problem statement, in which i need all the field names at child level of 'config.first.… Read more Collect Distinct Field Names At Nested Level With Specific Condition
Reshape Array That Is Stored In A Collection And Export To Csv

Reshape Array That Is Stored In A Collection And Export To Csv

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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
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