mongodb array of objects code example

Example 1: search inside array with object mongodb

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

Example 2: find object in array mongodb

db.users.findOne({"_id": id},{awards: {$elemMatch: {award:'Turing Award', year:1977}}})

Example 3: how to get array object value in mongodb

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

Example 4: how to get array object value in mongodb

db.test.aggregate([
    {$match: {'shapes.color': 'red'}},
    {$project: {
        shapes: {$filter: {
            input: '$shapes',
            as: 'shape',
            cond: {$eq: ['$$shape.color', 'red']}
        }},
        _id: 0
    }}
])