Add the rating column to feedbacks

app/models/feedback.rb

@@ -1,3 +1,9 @@
 class Feedback < ApplicationRecord
   belongs_to :user
+
+  enum rating: {
+    happy:    'happy',
+    neutral:  'neutral',
+    unhappy:  'unhappy'
+  }
 end

db/migrate/20180827102828_add_rating_to_feedbacks.rb

@@ -0,0 +1,5 @@
+class AddRatingToFeedbacks < ActiveRecord::Migration[5.2]
+  def change
+    add_column :feedbacks, :rating, :string
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2018_08_22_162952) do
+ActiveRecord::Schema.define(version: 2018_08_27_102828) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -323,6 +323,7 @@ ActiveRecord::Schema.define(version: 2018_08_22_162952) do
     t.integer "mark"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.string "rating"
     t.index ["user_id"], name: "index_feedbacks_on_user_id"
   end