mongodb search for array element within object code example

Example 1: search inside array with object mongodb

db.users.find({awards: {$elemMatch: {award:'National Medal', year:1975}}})

Example 2: how to get array object value in mongodb

db.products.aggregate([
    {$unwind: "$ratings"},
    {$match: {'ratings.user': ObjectId("5f6e2e0b70eb0208fc8401a1")}}
])