Legislation Answer model

app/models/legislation/answer.rb

@@ -0,0 +1,9 @@
+class Legislation::Answer < ActiveRecord::Base
+  belongs_to :question, class_name: 'Legislation::Question', foreign_key: 'legislation_question_id', dependent: :destroy, inverse_of: :answers, counter_cache: true
+  belongs_to :question_option, class_name: 'Legislation::QuestionOption', foreign_key: 'legislation_question_option_id', dependent: :destroy, inverse_of: :answers, counter_cache: true
+  belongs_to :user, dependent: :destroy, inverse_of: :legislation_answers
+
+  validates :question, presence: true, uniqueness: { scope: :user_id}
+  validates :question_option, presence: true
+  validates :user, presence: true
+end

app/models/legislation/question.rb

@@ -6,6 +6,7 @@ class Legislation::Question < ActiveRecord::Base
   belongs_to :process, class_name: 'Legislation::Process', foreign_key: 'legislation_process_id'
 
   has_many :question_options, class_name: 'Legislation::QuestionOption', foreign_key: 'legislation_question_id', dependent: :destroy, inverse_of: :question
+  has_many :answers, class_name: 'Legislation::Answer', foreign_key: 'legislation_question_id', dependent: :destroy, inverse_of: :question
   has_many :comments, as: :commentable
 
   accepts_nested_attributes_for :question_options, :reject_if => proc { |attributes| attributes[:value].blank? }, allow_destroy: true

app/models/legislation/question_option.rb

@@ -3,6 +3,7 @@ class Legislation::QuestionOption < ActiveRecord::Base
   include ActsAsParanoidAliases
 
   belongs_to :question, class_name: 'Legislation::Question', foreign_key: 'legislation_question_id', inverse_of: :question_options
+  has_many :answers, class_name: 'Legislation::Answer', foreign_key: 'legislation_question_id', dependent: :destroy, inverse_of: :question
 
   validates :question, presence: true
   validates :value, presence: true, uniqueness: { scope: :legislation_question_id }

app/models/user.rb

@@ -25,6 +25,7 @@ class User < ActiveRecord::Base
   has_many :notifications
   has_many :direct_messages_sent,     class_name: 'DirectMessage', foreign_key: :sender_id
   has_many :direct_messages_received, class_name: 'DirectMessage', foreign_key: :receiver_id
+  has_many :legislation_answers, class_name: 'Legislation::Answer', dependent: :destroy, inverse_of: :user
   belongs_to :geozone
 
   validates :username, presence: true, if: :username_required?

db/migrate/20161222115744_create_legislation_answers.rb

@@ -0,0 +1,13 @@
+class CreateLegislationAnswers < ActiveRecord::Migration
+  def change
+    create_table :legislation_answers do |t|
+      t.references :legislation_question, index: true
+      t.references :legislation_question_option, index: true
+      t.references :user, index: true
+
+      t.datetime :hidden_at, index: true
+
+      t.timestamps null: false
+    end
+  end
+end

db/schema.rb

@@ -227,6 +227,20 @@ ActiveRecord::Schema.define(version: 20161222180927) do
     t.datetime "updated_at", null: false
   end
 
+  create_table "legislation_answers", force: :cascade do |t|
+    t.integer  "legislation_question_id"
+    t.integer  "legislation_question_option_id"
+    t.integer  "user_id"
+    t.datetime "hidden_at"
+    t.datetime "created_at",                     null: false
+    t.datetime "updated_at",                     null: false
+  end
+
+  add_index "legislation_answers", ["hidden_at"], name: "index_legislation_answers_on_hidden_at", using: :btree
+  add_index "legislation_answers", ["legislation_question_id"], name: "index_legislation_answers_on_legislation_question_id", using: :btree
+  add_index "legislation_answers", ["legislation_question_option_id"], name: "index_legislation_answers_on_legislation_question_option_id", using: :btree
+  add_index "legislation_answers", ["user_id"], name: "index_legislation_answers_on_user_id", using: :btree
+
   create_table "legislation_draft_versions", force: :cascade do |t|
     t.integer  "legislation_process_id"
     t.string   "title"

spec/factories.rb

@@ -411,4 +411,10 @@ FactoryGirl.define do
     question factory: :legislation_question
     sequence(:value) { |n| "Option #{n}" }
   end
+
+  factory :legislation_answer, class: 'Legislation::Answer' do
+    question factory: :legislation_question
+    question_option factory: :legislation_question_option
+    user
+  end
 end

spec/models/legislation/answer_spec.rb

@@ -0,0 +1,39 @@
+require 'rails_helper'
+
+RSpec.describe Legislation::Answer, type: :model do
+  let(:legislation_answer) { build(:legislation_answer) }
+
+  it "should be valid" do
+    expect(legislation_answer).to be_valid
+  end
+
+  it "counts answers" do
+    question = create(:legislation_question)
+    option_1 = create(:legislation_question_option, question: question, value: 'Yes')
+    option_2 = create(:legislation_question_option, question: question, value: 'No')
+
+    answer = create(:legislation_answer, question: question, question_option: option_2)
+
+    expect(answer).to be_valid
+    expect(question.answers_count).to eq 1
+    expect(option_2.answers_count).to eq 1
+    expect(option_1.answers_count).to eq 0
+  end
+
+  it "can't answer same question more than once" do
+    question = create(:legislation_question)
+    option_1 = create(:legislation_question_option, question: question, value: 'Yes')
+    option_2 = create(:legislation_question_option, question: question, value: 'No')
+    user = create(:user)
+
+    answer = create(:legislation_answer, question: question, question_option: option_2, user: user)
+    expect(answer).to be_valid
+
+    second_answer = build(:legislation_answer, question: question, question_option: option_1, user: user)
+    expect(second_answer).to be_invalid
+
+    expect(question.answers_count).to eq 1
+    expect(option_2.answers_count).to eq 1
+    expect(option_1.answers_count).to eq 0
+  end
+end