irb(main):058:0> Product.count
=> 0
irb(main):059:0> Product.count
=> -1
irb(main):060:0> Product.all.first
=> #<Product _id: 5584875f69702d4cf6000003, created_at: nil, updated_at: nil, title: nil, description: nil, slug: nil, dealership_type: nil, dealership_id: nil, external_version: nil, build_version: nil, content_zone: nil, external_id: nil, price: nil, price_rent: nil, price_negotiable: false, used: false, location: nil, photos: nil, specs: nil, category: nil>
irb(main):061:0> Product.count
=> 0
irb(main):062:0> Product.count
=> -1

require 'money'
class Product
  include Mongoid::Document
  include Mongoid::Timestamps

  field :title,             type: String
  field :description,       type: String
  field :slug,       type: String

  field :dealership_type,   type: String
  field :dealership_id,     type: String
  field :external_version,  type: String
  field :build_version,     type: String
  field :content_zone,      type: String
  
  field :external_id,       type: String

  field :price,             type: Money
  field :price_rent,        type: Money
  field :price_negotiable,  type: Boolean, default: false
  field :used,              type: Boolean, default: false
  field :location,          type: String

  field :photos,            type: Array
  field :specs,             type: Array
  field :category,          type: String

  validates :category, :title, presence: true
  
  index({build_version: 1, dealership_type: 1, dealership_id: 1, external_id: 1})
  index({build_version: 1})
end