init comments

db/migrate/20170210165110_create_quiz_comments.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+class CreateQuizComments < ActiveRecord::Migration[5.0]
+  def change
+    create_table :quiz_comments do |t|
+      t.integer :user_id
+      t.string :test_hash
+      t.text :message
+
+      t.timestamps
+    end
+  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: 20170208212526) do
+ActiveRecord::Schema.define(version: 20170210165110) do
 
   create_table "answers", force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8" do |t|
     t.integer  "candidate_id"
@@ -60,6 +60,14 @@ ActiveRecord::Schema.define(version: 20170208212526) do
     t.index ["sort"], name: "index_questions_on_sort", using: :btree
   end
 
+  create_table "quiz_comments", force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8" do |t|
+    t.integer  "user_id"
+    t.string   "test_hash"
+    t.text     "message",    limit: 65535
+    t.datetime "created_at",               null: false
+    t.datetime "updated_at",               null: false
+  end
+
   create_table "quizzes", force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8" do |t|
     t.string   "unit"
     t.string   "dept"