Comparing Arrays

index.html.erb

<h3>Result Sets</h3>
<div class="span12" style="width:100%;margin:5px;">
  <% if current.loginable_type != 'Student'  %>
      <%= simple_form_for(result_sets_path, :method =>'get', :html => { :class => 'form-horizontal' }) do %>
          <%= select_tag 'id', options_for_select(@quiz_id), { :prompt => 'Quiz Name'} %>
          <%= select_tag 'student_id', options_for_select(@quiz_student_name), { :prompt => 'Student Name'} %>
          <%= submit_tag 'Submit', :class => 'btn btn-primary' %>
      <% end %>
  <% end %>


  <% @query.each do |a| %>
      <table class="table table-condensed table-bordered table-striped table-responsive">
        <tr>
          <th>Student</th>
          <th>Quiz</th>
          <th>Survey ID</th>
          <th>Result ID</th>
          <th>Correct Answers</th>
          <th>User Answers</th>
        </tr>
        </thead>

        <tbody>
        <tr>
          <td><%= a.student.user.name %></td>
          <td><%= a.survey.name %></td>
          <td><%= a.survey_id %></td>
          <td><%= a.id %></td>

          <td><%= @actual %></td>
          <td><%= @correct.collect{|x| "#{x}"} %></td>

          <td><%= @score %></td>


        </tr>
        </tbody>
      </table>
  <% end %>

</div>

result_sets_controller.rb

class ResultSetsController < ApplicationController
  before_filter :new

  def index
    @surveys = Survey.all
    @result_sets = ResultSet.all

    @quiz_id = ResultSet.all.map { |u| [u.survey.name, u.id] }
    @quiz_student_name = ResultSet.all.map { |u| [u.student.user.name, u.student_id]}

    runquery = ResultSet
    runquery = runquery.where(:id => params[:id]) if params[:id].present?
    runquery = runquery.where(:student_id => params[:student_id]) if params[:student_id].present?
    runquery = runquery.select('result_sets.*')

    @query = runquery


    @arr = []
    @actual = []

    @query.each do |a|

      a.serial.to_a.each do |key,value|
       @actual << value
      end

      a.survey.questions.each do |b|


        @id = b.answers
        @id.each do |c|

          if c.correct == true
            @correct = @arr << c.id
          end
        end
      end
    end

    @score = @correct

  end

  def new
    @result_set = ResultSet.new
  end

  def create
    @result_set = ResultSet.new(result_set_params)
    @result_set.save!
    redirect_to result_sets_path, notice: "Quiz Completed Successfully"
  end

  def show
  end


  private

  def result_set_params
    params.require(:result_set).permit!

  end
end