Added Quiz model class and association with MultipleChoiceQuestion class

app/models/multiple_choice_question.rb

@@ -11,9 +11,19 @@
 #  question     :string
 #  created_at   :datetime         not null
 #  updated_at   :datetime         not null
+#  quiz_id      :integer
+#
+# Indexes
+#
+#  index_multiple_choice_questions_on_quiz_id  (quiz_id)
 #
 
 class MultipleChoiceQuestion < ApplicationRecord
+  belongs_to :quiz,
+    class_name: 'Quiz',
+    foreign_key: 'quiz_id',
+    inverse_of: :questions
+
   validates :question, presence: true
   validates :answer, presence: true
   validates :distractor_1, presence: true

app/models/quiz.rb

@@ -0,0 +1,18 @@
+# == Schema Information
+#
+# Table name: quizzes
+#
+#  id          :integer          not null, primary key
+#  description :text
+#  title       :string
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#
+
+class Quiz < ApplicationRecord
+  has_many :questions,
+    class_name: 'MultipleChoiceQuestion',
+    foreign_key: 'quiz_id',
+    inverse_of: :quiz,
+    dependent: :destroy
+end

db/migrate/20181022151903_create_quizzes.rb

@@ -0,0 +1,10 @@
+class CreateQuizzes < ActiveRecord::Migration[5.2]
+  def change
+    create_table :quizzes do |t|
+      t.string :title
+      t.text :description
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20181022152131_add_quiz_ref_to_multiple_choice_questions.rb

@@ -0,0 +1,5 @@
+class AddQuizRefToMultipleChoiceQuestions < ActiveRecord::Migration[5.2]
+  def change
+    add_reference :multiple_choice_questions, :quiz, foreign_key: true
+  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_09_21_202046) do
+ActiveRecord::Schema.define(version: 2018_10_22_152131) do
 
   create_table "multiple_choice_questions", force: :cascade do |t|
     t.string "question"
@@ -21,6 +21,15 @@
     t.string "distractor_4"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.integer "quiz_id"
+    t.index ["quiz_id"], name: "index_multiple_choice_questions_on_quiz_id"
+  end
+
+  create_table "quizzes", force: :cascade do |t|
+    t.string "title"
+    t.text "description"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
   end
 
 end

test/fixtures/multiple_choice_questions.yml

@@ -11,6 +11,11 @@
 #  question     :string
 #  created_at   :datetime         not null
 #  updated_at   :datetime         not null
+#  quiz_id      :integer
+#
+# Indexes
+#
+#  index_multiple_choice_questions_on_quiz_id  (quiz_id)
 #
 
 # Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html

test/fixtures/quizzes.yml

@@ -0,0 +1,20 @@
+# == Schema Information
+#
+# Table name: quizzes
+#
+#  id          :integer          not null, primary key
+#  description :text
+#  title       :string
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#
+
+# Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  title: MyString
+  description: MyText
+
+two:
+  title: MyString
+  description: MyText

test/models/multiple_choice_question_test.rb

@@ -11,6 +11,11 @@
 #  question     :string
 #  created_at   :datetime         not null
 #  updated_at   :datetime         not null
+#  quiz_id      :integer
+#
+# Indexes
+#
+#  index_multiple_choice_questions_on_quiz_id  (quiz_id)
 #
 
 require 'test_helper'

test/models/quiz_test.rb

@@ -0,0 +1,18 @@
+# == Schema Information
+#
+# Table name: quizzes
+#
+#  id          :integer          not null, primary key
+#  description :text
+#  title       :string
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#
+
+require 'test_helper'
+
+class QuizTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end