phase002 complete

app/models/vehicle.rb

@@ -0,0 +1,22 @@
+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