Add & Display Flights

app/models/aircraft.rb

@@ -0,0 +1,12 @@
+class Aircraft < ApplicationRecord
+  has_one :inspection
+  has_many :engine
+  has_many :flights
+
+  validates :reg, presence: true
+  validates :serial, presence: true
+
+  def to_s
+    return reg
+  end
+end