1 files changed, 17 insertions, 0 deletions
diff --git a/app/models/card.rb b/app/models/card.rb
index ae2b1e5..594ae43 100644
--- a/app/models/card.rb
+++ b/app/models/card.rb
@@ -1,3 +1,20 @@
+# frozen_string_literal: true
+
+# Card
+# number: string
+# expiration_month: integer
+# expiration_year: integer
+# expiration_day: integer
+# security_code: integer
 class Card < ApplicationRecord
   belongs_to :user_account
+  validates :number, presence: true, uniqueness: true, length: { is: 16 }
+  validates :expiration_year, presence: true, numericality: { greater_than: 1970 }
+  validates :expiration_month, presence: true, inclusion: { in: 1..12 }
+  validates :expiration_day, presence: true, inclusion: { in: 1..31 }
+  validates :security_code, presence: true
+
+  def expiration_date
+    "#{expiration_day}/#{expiration_month}/#{expiration_year}"
+  end
 end