Dodgy Bike models for my mogoid talk at RORO

bike.rb

class Bike
  include Mongoid::Document

  field :brand_name
  validates :brand_name, presence: true

  STYLES = %w(CARBON_MONSTROSITY DUALIE FIXIE TOURER)
  field :style
  validates :style, inclusion: STYLES

  field :colour

  field :price, type: BigDecimal

  embeds_many :parts

  # indexes
  index brand_name: 1
  index style: 1
  index colour: 1
  index price: 1
end

part.rb

class Part
  include Mongoid::Document

  embedded_in :bike

  field :name
  validates :name, presence: true

  field :brand_name

  field :colour
  validates :colour, presence: true

  # indexes
  index brand_name: 1

  # scopes
  scope :sram_cranks, ->(){
    where( name: 'CRANK',
           brand_name: 'SRAM')
  }
  
  before_save :upcase_colour

  def upcase_colour
    self.colour = colour.upcase
  end
end