db.createCollection( "vehicles" , {
    validator: { $jsonSchema: {
       bsonType: "object",
       required: [ "storage_number", "identificator"],
       properties: {
          storage_number: {
             bsonType: "string",
             description: "required and must be a valid string (3 Letters A to Z)" },
          identificator: {
             bsonType: "string",
             description: "required and must be a vlid string (5 numbers from 0 to 9)" }
       }
    }
 }})

db.vehicles.insert({
    storage_number: 'BMV',
    identificator: '5464564'
 })

db.createCollection( "vehicles" , {
    validator: { $jsonSchema: {
        bsonType: "object",
        required: [ "minimumPeople"],
        properties: {
            minimumPeople: {
                bsonType: "int",
                minimum: 2,
                description: "there must be minimum of 2 people" }
        }
    }
}})


db.runCommand( {
    collMod: "vehicles",
    validator: { $jsonSchema: {
       bsonType: "object",
       required: ["minimumPeople"],
       properties: {
        minimumPeople: {
           bsonType: "int",
           minimum: 2,
           description: "there must be minimum of 2 people" }
     }
    } }
 })


 db.vehicles.update(
    {},
    { $set: {"new_field": null} },
    false,
    true
  )


  var generateCargoName = function () {
    var cargoName = [  'Krastavici',
                        'Domati',
                        'Morkovi',
                        'Zele',
                        'Banani',
                        'Qbylki'
                    ];
    return cargoName[Math.floor(Math.random() * 6)];
}

var generateCategory = function () {
    var categories = [  'Zelenchuci',
                        'Plodove'
                    ];
    return categories[Math.floor(Math.random() * 2)];
}

var fillCargo = function(){
    var vehicles = db.vehicles.find().toArray();
    var cargo = {}

    for(i = 0; i < vehicles.length; i++){
        cargo.name = generateCargoName();
        cargo.category = generateCategory();
        cargo.quantity = Math.floor(Math.random + 200) + 1;
        cargo.vehicle_Id = vehicles[i]._id;

        db.cargo.insert(cargo);
    }
}