How to do a lookup in a Mongo nested array?

Question

MongoDB

There is a collection 'users' with 1 document
db.users.find() returns ()

{                                   
        "_id" : "L7Bo6u6Xy7KyXLvBR",                          
        "username" : "user",        
        "emails" : [                
                {                   
                        "address" : '[email protected]'
                }                   
        ]                           
}

like this

db.users.find({ 'emails':{'address': '[email protected]' }})

does not find, although in my understanding it should.
Or is searching in a nested array different from searching in a nested object?
Thanks

Answer 1

db.users.find({ 'emails':{ $elemMatch: {'address': '[email protected]'}}})

Answer 2

db.users.find({ "emails.address": "[email protected]" })