Add Bullet gem for dev & fix N+1 queries issues for core index actions

Gemfile

@@ -69,6 +69,7 @@ group :development do
   gem "web-console"
 
   gem "annotaterb"
+  gem "bullet"
 end
 
 group :test do

Gemfile.lock

@@ -91,6 +91,9 @@ GEM
     brakeman (8.0.4)
       racc
     builder (3.3.0)
+    bullet (8.1.0)
+      activesupport (>= 3.0.0)
+      uniform_notifier (~> 1.11)
     capybara (3.40.0)
       addressable
       matrix
@@ -424,6 +427,7 @@ GEM
     unicode-display_width (3.2.0)
       unicode-emoji (~> 4.1)
     unicode-emoji (4.2.0)
+    uniform_notifier (1.18.0)
     uri (1.1.1)
     useragent (0.16.11)
     web-console (4.3.0)
@@ -455,6 +459,7 @@ DEPENDENCIES
   bootsnap
   bootstrap (~> 5.3.3)
   brakeman
+  bullet
   capybara
   csv
   damerau-levenshtein

app/controllers/contestants_controller.rb

@@ -12,7 +12,7 @@ class ContestantsController < ApplicationController
   def index
     authorize @contest
 
-    @contestants = @contest.contestants.sort_by { |contestant| contestant.name }
+    @contestants = @contest.contestants.includes([ :completions, :offline ]).sort_by { |contestant| contestant.name }
     filter_contestants_per_category
   end
 

app/controllers/contests_controller.rb

@@ -10,7 +10,7 @@ class ContestsController < ApplicationController
   def index
     authorize :contest
 
-    @contests = current_user.contests
+    @contests = current_user.contests.includes([ :contestants, puzzles: [ :image_attachment ] ])
     @title = I18n.t("contests.index.title", username: current_user.username)
   end
 

app/controllers/puzzles_controller.rb

@@ -6,7 +6,7 @@ class PuzzlesController < ApplicationController
     authorize @contest
 
     @title = @contest.name
-    @puzzles = @contest.puzzles.order(:id)
+    @puzzles = @contest.puzzles.includes([ :image_attachment ]).order(:id)
   end
 
   def edit

app/controllers/users_controller.rb

@@ -7,7 +7,7 @@ class UsersController < ApplicationController
     authorize :user
 
     @title = t("users.index.title")
-    @users = User.all
+    @users = User.all.includes(contests: [ :contestants, :puzzles ])
   end
 
   def edit

config/environments/development.rb

@@ -71,4 +71,11 @@ Rails.application.configure do
 
   # Apply autocorrection by RuboCop to files generated by `bin/rails generate`.
   # config.generators.apply_rubocop_autocorrect_after_generate!
+
+  config.after_initialize do
+    Bullet.enable = true
+    Bullet.alert = true
+    Bullet.console = true
+    Bullet.rails_logger = true
+  end
 end