Answers for "finding by sub property of an object in mongo"

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finding by sub property of an object in mongo

db.messages.find( { headers : { From: "[email protected]" } } )

This queries for documents where headers equals { From: ... }, i.e. contains no other fields.

db.messages.find( { 'headers.From': "[email protected]" }  )

This only looks at the headers.From field, not affected by other fields contained in, or missing from, headers.

Posted by: Guest on December-23-2020

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