CSV download

app/controllers/applied_jobs_controller.rb

@@ -37,8 +37,14 @@ class AppliedJobsController < ApplicationController
     return unless current_user.admin
 
     get_data_search_bar
-    @date, @applied_jobs = SearchAppliedJob.search(params)
-    render 'users/applied_jobs'
+    @date, @applied_jobs = SearchAppliedJobsService.search(params)
+    respond_to do |format|
+      format.html { render 'users/applied_jobs' }
+      format.csv { 
+        send_data ExportCsvService.new(@applied_jobs, AppliedJob::CSV_ATTRIBUTES).perform, 
+        filename: "applied_jobs.csv" 
+      }
+    end
   end
 
   private

app/models/applied_job.rb

 class AppliedJob < ApplicationRecord
   scope :of_email, ->(email) { where(email: email) if email.present? }
+  
   EMAIL_REGEXN = /\A[a-zA-Z][\w\.]+@[a-zA-Z]+\.[a-zA-Z]+\z/
+  CSV_ATTRIBUTES = %w(job_id job_title email full_name curriculum_vitae created_at).freeze
 
   belongs_to :user
   belongs_to :job

app/services/export_csv_service.rb

+require 'csv'
+
+class ExportCsvService
+  def initialize(objects, attributes)
+    @objects = objects
+    @attributes = attributes
+  end
+  
+  def perform
+    CSV.generate do |csv|
+      csv << attributes
+      objects.each do |object|
+        csv << attributes.map { |att| object.public_send(att) }
+      end
+    end
+  end
+
+  private
+  
+  attr_reader :attributes, :objects
+end

lib/common/search_applied_job.rb → app/services/search_applied_jobs_service.rb

-module SearchAppliedJob
+module SearchAppliedJobsService
   def self.search(params)
     date = {}
     if params[:email].nil?
@@ -9,7 +9,11 @@ module SearchAppliedJob
       date[:from] = Date.new(params[:applied_at]["from(1i)"].to_i, params[:applied_at]["from(2i)"].to_i, params[:applied_at]["from(3i)"].to_i)
       date[:to] = Date.new(params[:applied_at]["to(1i)"].to_i, params[:applied_at]["to(2i)"].to_i, params[:applied_at]["to(3i)"].to_i)
       job_ids = Job.of_industry(params[:industry]).of_location(params[:location]).pluck(:id)
-      applied_jobs = AppliedJob.includes(:job).of_email(params[:email]).where(created_at: date[:from]..date[:to], job_id: job_ids).page(params[:page])
+      applied_jobs = AppliedJob.joins(:job)
+                      .select("applied_jobs.*, jobs.title as job_title")
+                      .of_email(params[:email])
+                      .where(created_at: date[:from]..date[:to], job_id: job_ids)
+                      .page(params[:page])
     end
     [date, applied_jobs]
   end

app/views/users/_applied_job.html.erb

@@ -2,7 +2,7 @@
   <div class="row">
     <div class = "col-lg-10">
       <div class='card-body'>
-        <%= link_to applied_job.job.title, job_path(applied_job.job_id), class: 'card-title font-weight-bold text-decoration-none' %>
+        <%= link_to applied_job.job_title, job_path(applied_job.job_id), class: 'card-title font-weight-bold text-decoration-none' %>
         <p><strong>Candidate Name: </strong><%= link_to applied_job.full_name, user_path(applied_job.user_id) %></p>
         <p><strong>Candidate's CV: </strong><%= link_to applied_job.curriculum_vitae.identifier, applied_job.curriculum_vitae.url %></p>
         <p><strong>Candidate's Email: </strong><%= applied_job.email %></p>

app/views/users/applied_jobs.html.erb

@@ -14,8 +14,8 @@
         { order: [:year, :month, :day], use_month_numbers: true, use_two_digit_numbers: true, selected: @date[:to] },
         { class: 'form-control mx-1' } %>
     </div>
-    <%= submit_tag 'Search', name: nil, class: 'btn btn-outline-success m-2' %>
-    <%= button_tag 'CSV Download', class: 'btn btn-outline-success m-2' %>
+    <%= button_tag 'Search', name: nil, type: 'submit', class: 'btn btn-outline-success m-2' %>
+    <%= button_tag 'CSV Download', value: 'csv', name: 'format', class: 'btn btn-outline-success m-2' %>
   <% end %>
 </div>
 <div class='content'>