initialize method to_slug, used scope and class method

Gemfile

@@ -45,6 +45,7 @@ group :development do
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
   gem 'spring'
   gem 'rubocop-rails', '~> 2.11', '>= 2.11.3'
+  gem 'bullet', '~> 6.1', '>= 6.1.4'
 end
 
 group :test do

Gemfile.lock

@@ -84,6 +84,9 @@ GEM
     bootsnap (1.7.5)
       msgpack (~> 1.0)
     builder (3.2.4)
+    bullet (6.1.4)
+      activesupport (>= 3.0.0)
+      uniform_notifier (~> 1.11)
     byebug (11.1.3)
     capybara (3.35.3)
       addressable
@@ -135,8 +138,6 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    pry-nav (0.3.0)
-      pry (>= 0.9.10, < 0.13.0)
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.6)
@@ -238,6 +239,7 @@ GEM
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.0.0)
+    uniform_notifier (1.14.2)
     web-console (4.1.0)
       actionview (>= 6.0.0)
       activemodel (>= 6.0.0)
@@ -264,6 +266,7 @@ PLATFORMS
 
 DEPENDENCIES
   bootsnap (>= 1.4.4)
+  bullet (~> 6.1, >= 6.1.4)
   byebug
   capybara (>= 3.26)
   httparty (~> 0.18.1)
@@ -272,7 +275,6 @@ DEPENDENCIES
   listen (~> 3.3)
   mysql2 (~> 0.5)
   nokogiri (~> 1.11, >= 1.11.7)
-  pry-nav (~> 0.3.0)
   pry-rails (~> 0.3.9)
   puma (~> 5.0)
   rack-mini-profiler (~> 2.0)

app/controllers/cities_controller.rb

 class CitiesController < ApplicationController
   def index
-    @region_job_list = City.joins(:jobs).group(:region).count
+    @region_job_list = City.jobs_count
   end
+
   def show
   end
 end

app/controllers/industries_controller.rb

 class IndustriesController < ApplicationController
   def index
-    @industries_job_list = Industry.joins(:jobs).group(:name).count.sort_by(&:first)
+    # @industries_job_list = Industry.joins(:jobs).group(:name).count.sort_by(&:first)
+    @industries_job_list = Industry.jobs_count
   end
   def show
   end

app/controllers/top_controller.rb

 class TopController < ApplicationController
   def index
-    @latest_jobs = Job.order(updated_at: :desc).limit(5)
-    @top_cities = City.all.map { |city| [city, city.jobs.count] }.sort_by(&:second).reverse.take(9)
-    @top_industries = Industry.all.map { |industry| [industry, industry.jobs.count] }.sort_by(&:second).reverse.take(9)
+    @total_job = Job.count
+    @latest_jobs = Job.order(updated_at: :desc).limit(5).joins(:cities).includes(:company, :cities, :cities_jobs)
+    @top_cities = City.top_jobs
+    @top_industries = Industry.top_jobs
   end
 end

app/models/application_record.rb

 class ApplicationRecord < ActiveRecord::Base
   self.abstract_class = true
-  def to_slug(string)
-    string.parameterize.truncate 80, omission: ''
-  end
 end

app/models/city.rb

 class City < ApplicationRecord
+  scope :jobs_count, -> { joins(:jobs).group(:region).count }
+
   has_and_belongs_to_many :jobs
-  enum region: %i[Vietnam International]
+  enum region: { vietnam: 0, international: 1 }
 
   validates :slug, presence: true, uniqueness: { case_sensitive: true }
 
@@ -11,4 +13,8 @@ class City < ApplicationRecord
   def add_slugs
     update slug: to_slug(name)
   end
+
+  def self.top_jobs
+    self.all.map { |city| [city, city.jobs.count] }.sort_by(&:second).reverse.take(9)
+  end
 end

app/models/industry.rb

 class Industry < ApplicationRecord
+  scope :jobs_count, -> { joins(:jobs).group(:name).count.sort_by(&:first) }
+
   has_and_belongs_to_many :jobs
 
   validates :slug, presence: true, uniqueness: { case_sensitive: true }
@@ -12,4 +14,8 @@ class Industry < ApplicationRecord
   def add_slugs
     update slug: to_slug(name)
   end
+
+  def self.top_jobs
+    self.all.map { |industry| [industry, industry.jobs.count] }.sort_by(&:second).reverse.take(9)
+  end
 end

app/views/cities/_cities_list.html.slim

@@ -4,7 +4,7 @@
       .countries-job-list id=region 
         .container-fullwidth.py-5
           h2.mt-0
-            = region.upcase
+            = region
             small.text-muted
               |  (#{pluralize(job_count, "job")})
             hr.my-4

app/views/top/_search.html.slim

@@ -5,7 +5,7 @@
       .col-xl-9.mx-auto
         h1.mb-5.mt-5
           | Total: 
-          =  pluralize(Job.count, "job")
+          =  pluralize(@total_job, "job")
     .row.justify-content-start
       .col-md-10.mb-md-0.no-padding
         span.fa.fa-search.form-control-feedback

config/environments/development.rb

@@ -73,4 +73,20 @@ Rails.application.configure do
 
   # Uncomment if you wish to allow Action Cable access from any origin.
   # config.action_cable.disable_request_forgery_protection = true
+
+  # Enable bullet, tunrn on logger
+  # config.after_initialize do
+  #   Bullet.enable = true
+  #   Bullet.bullet_logger = true
+  #   Bullet.raise = true # raise an error if n+1 query occurs
+  #   Bullet.unused_eager_loading_enable = false
+  # end
+  config.after_initialize do
+    Bullet.enable = true
+    Bullet.alert = true
+    Bullet.bullet_logger = true
+    Bullet.console = true
+    Bullet.rails_logger = true
+    Bullet.add_footer = true
+  end
 end

config/initializers/string.rb

+class String
+  def to_slug
+    source = [
+      'à', 'á', 'â', 'ã', 'è', 'é', 'ê', 'ì', 'í', 'ò',
+      'ó', 'ô', 'õ', 'ù', 'ú', 'ý', 'ă', 'đ', 'ĩ', 'ũ',
+      'ơ', 'ư', 'ạ', 'ả', 'ấ', 'ầ', 'ẩ', 'ẫ', 'ậ', 'ắ',
+      'ằ', 'ẳ', 'ẵ', 'ặ', 'ẹ', 'ẻ', 'ẽ', 'ế', 'ề', 'ể',
+      'ễ', 'ệ', 'ỉ', 'ị', 'ọ', 'ỏ', 'ố', 'ồ', 'ổ', 'ỗ',
+      'ộ', 'ớ', 'ờ', 'ở', 'ỡ', 'ợ', 'ụ', 'ủ', 'ứ', 'ừ',
+      'ử', 'ữ', 'ự', 'ỳ', 'ỷ', 'ỹ', 'ỵ'
+    ]
+    destination = [
+      'a', 'a', 'a', 'a', 'e', 'e', 'e', 'i', 'i', 'o',
+      'o', 'o', 'o', 'u', 'u', 'y', 'a', 'd', 'i', 'u',
+      'o', 'u', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a',
+      'a', 'a', 'a', 'a', 'e', 'e', 'e', 'e', 'e', 'e',
+      'e', 'e', 'i', 'i', 'o', 'o', 'o', 'o', 'o', 'o',
+      'o', 'o', 'o', 'o', 'o', 'o', 'u', 'u', 'u', 'u',
+      'u', 'u', 'u', 'y', 'y', 'y', 'y'
+    ]
+    hash = Hash[source.zip destination]
+    self.downcase.encode('ASCII', 'UTF-8', fallback: hash).gsub(' ', '-').parameterize.truncate 80
+  end
+end