Description

Description:

This line on the $arrayToObject documentation is incorrect:
https://docs.mongodb.com/manual/reference/operator/aggregation/arrayToObject/

"If the name of a field repeats in the array, $arrayToObject uses the first value for that field."

BEFORE this fix, which field was used when there are repeats was language/driver dependent.

AFTER this fix, the last field will always be used when there are repeats.

Feel free to email me if you have any questions!

Engineering Ticket Description:

Using $arrayToObject on an array of {k: ..., v: ...} objects where some k are repeating outputs an object that behaves inconsistently.

Referencing this object as a whole using "$object" outputs an object with a field value that is different compared to the value obtained by referencing the field directly using "$object.field".

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)