Schema validation (query operators)

db.createCollection("publishers", {
    validator: {
        $and: [
            { name: { $type: "string" } },
            { email_address: { $type: "string" } },
            { status: { $in: [ 1, 0 ] } },
            { created_at: { $type: "int" } }
        ]
    }
})