Initial commit

app/models/province.rb

@@ -0,0 +1,21 @@
+class Province < ApplicationRecord
+    has_many :cities
+
+    validates :name, presence: true,
+                         length: 1..255,
+                         format: {
+                           with: /\A[[:word:]\s\-']+\z/,
+                           message: 'only allows letters, digits "-", "\'", and space'
+                         }
+end
+
+# == Schema Information
+# Schema version: 20210420111532
+#
+# Table name: provinces
+#
+#  id         :bigint           not null, primary key
+#  name       :string(255)
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#