first commit

app/models/application_record.rb

@@ -0,0 +1,3 @@
+class ApplicationRecord < ActiveRecord::Base
+  primary_abstract_class
+end

app/models/schedule.rb

@@ -0,0 +1,6 @@
+class Schedule < ApplicationRecord
+  validates :temperature,
+            presence:     true,
+            numericality: true,
+            format:       { with: /\A\d+(\.\d)?\z/ }
+end