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New posts in aggregation-framework

The Field "$_id" must be an accumulator object

Get index of given element in array field in MongoDB

Mongodb count all array elements in all objects matching by criteria

What is $$ROOT in MongoDB aggregate and how it works?

How to group documents with specific field in aggregation of mongodb

How to solve empty array with $unwind?

Return whole document from aggregation

MongoDB nested object aggregation counting

Combine multiple groups in an aggregation in mongodb

mongodb multiple match conditions and return documents with common name

How can I implement addFields mongoDB query in Java

Mongoose 5.x disallows passing a spread of operators

Mongo DB aggregation array size greater than match [duplicate]

Find match over Array of RegEx in MongoDB Collection

mongodb aggregation project objectId with concat

MongoDB Aggregation Error "each item in the pipeline must be a document"

Why mongo doesn't allow to use a $facet stage inside another $facet?

Concat String by Group

How to use graph lookup aggregation in a embedded array document