class Vehicle < ApplicationRecord has_many :maintenance_schedules, dependent: :restrict_with_error has_many :fuel_entries, dependent: :restrict_with_error has_many :maintenance_entries, dependent: :restrict_with_error before_validation :normalize_vin validates :make, :model, :color, :vin, :licence_plate, presence: true validates :vin, uniqueness: true validates :licence_plate, uniqueness: { case_sensitive: false } validates :year, presence: true, numericality: { only_integer: true, greater_than_or_equal_to: 1980, less_than_or_equal_to: ->(_vehicle) { Date.current.year } } validates :current_odometer, presence: true, numericality: { only_integer: true, greater_than_or_equal_to: 0 } validates :fuel_tank_size, presence: true, numericality: { greater_than: 0 } validates :active, inclusion: { in: [ true, false ] } private def normalize_vin self.vin = vin.to_s.strip.upcase if vin.present? end end