Finished phase006

app/models/maintenance_schedule.rb

@@ -4,4 +4,18 @@ class MaintenanceSchedule < ApplicationRecord
   validates :maintenance_type, presence: true, uniqueness: { scope: :vehicle_id, case_sensitive: false }
   validates :mileage_interval, presence: true, numericality: { only_integer: true, greater_than: 0 }
   validates :time_interval, presence: true, numericality: { only_integer: true, greater_than: 0 }
+  validates :baseline_odometer, presence: true, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
+  validates :baseline_date, presence: true
+  validates :active, inclusion: { in: [ true, false ] }
+  validate :baseline_date_cannot_be_in_the_future
+
+  scope :active, -> { where(active: true) }
+
+  private
+
+  def baseline_date_cannot_be_in_the_future
+    return if baseline_date.blank? || baseline_date <= Date.current
+
+    errors.add(:baseline_date, "can't be in the future")
+  end
 end