init project

app/models/concerns/likeable.rb

@@ -0,0 +1,21 @@
+module Likeable
+  extend ActiveSupport::Concern
+
+  included do
+    has_many :praise_treads, as: :praise_tread_object, dependent: :destroy
+  end
+
+  def liked?(praiseable)
+    praiseable.praise_treads.exists?(user_id: self.id)
+  end
+
+  def like!(praiseable)
+    praiseable.praise_treads.create!(user_id: self.id)
+  end
+
+  def unlike!(praiseable)
+    obj = praiseable.praise_treads.find_by(user_id: self.id)
+    obj.destroy! if obj.present?
+  end
+
+end