Eliminate some N+1s

Gemfile.lock

@@ -625,6 +625,7 @@ PLATFORMS
   arm64-darwin-21
   arm64-darwin-22
   arm64-darwin-23
+  arm64-darwin-24
   x86_64-linux
 
 DEPENDENCIES

app/controllers/application_controller.rb

@@ -12,7 +12,9 @@ class ApplicationController < ActionController::Base
   def current_profile = current_user&.profile
 
   # TODO: Must change after implementing multi-conference support
-  def current_conference = Conference.last
+  def current_conference
+    @_current_conference ||= Conference.last
+  end
 
   def vapid_public_key
     Base64.urlsafe_decode64(ENV["VAPID_PUBLIC_KEY"]).bytes.to_json

app/controllers/schedules_controller.rb

@@ -3,7 +3,7 @@ def show
     @sessions = SessionQuery.new(
       relation: current_user.sessions.where(conference: current_conference),
       params: filter_params
-    ).call.includes(:attendees, :location, :speakers, :tags).order(:starts_at)
+    ).call.includes(:location, :tags, speakers: [profile: :image_attachment]).order(:starts_at)
   end
 
   private

app/controllers/sessions_controller.rb

@@ -4,11 +4,11 @@ def index
     @sessions = SessionQuery.new(
       relation: sessions.joins(:location).distinct,
       params: filter_params
-    ).call.includes(:attendees, :tags).order(:starts_at)
+    ).call.includes(:location, :tags, speakers: [profile: :image_attachment]).order(:starts_at)
   end
 
   def show
-    @session = sessions.friendly.find(params[:id])
+    @session = sessions.friendly.includes(:location, :tags, speakers: [profile: :image_attachment]).find(params[:id])
   end
 
   private

app/views/layouts/_bottom_navbar.html.erb

@@ -54,7 +54,7 @@
         <% if unread_notifications.present? %>
           <div class="absolute -top-0.5 right-0 w-[18px] h-[18px] rounded-full bg-red flex justify-center items-center">
             <span class="text-[11px] text-white font-bold px-1">
-              <%= unread_notifications.count < 10 ? unread_notifications.count : "+9" %>
+              <%= unread_notifications.length < 10 ? unread_notifications.length : "+9" %>
             </span>
           </div>
         <% end %>

app/views/schedules/show.html.erb

@@ -32,7 +32,7 @@
               </a>
             </div>
             <div class="w-full mx-2 mb-1 border-b"></div>
-            <div class="mb-1 text-gray-400 text-nowrap"><%= pluralize(sessions.count, "Session") %></div>
+            <div class="mb-1 text-gray-400 text-nowrap"><%= pluralize(sessions.length, "Session") %></div>
           <% end %>
           <% sessions.each do |session| %>
             <%= render(

app/views/sessions/_card.html.erb

@@ -58,7 +58,7 @@
             :div,
             class: [
               "flex flex-col ml-2",
-              "max-w-[200px]": session.speakers.count > 1
+              "max-w-[200px]": session.speakers.length > 1
             ]
           ) do %>
             <h2 class="text-sm italic font-black group-hover:text-red group-focus:text-red"><%= speaker.name %></h2>
@@ -71,7 +71,7 @@
   <% end %>
 
   <div class="flex flex-col">
-    <% if session.tags.exists? %>
+    <% if session.tags.present? %>
       <div class="flex flex-wrap w-full gap-2 mb-3">
         <% session.tags.each do |tag| %>
           <div class="px-2 py-1 text-xs bg-transparent border rounded-lg border-bluegray-600 text-bluegray-600">

app/views/sessions/index.html.erb

@@ -32,7 +32,7 @@
               </a>
             </div>
             <div class="w-full mx-2 mb-1 border-b"></div>
-            <div class="mb-1 text-gray-400 text-nowrap"><%= pluralize(sessions.count, "Session") %></div>
+            <div class="mb-1 text-gray-400 text-nowrap"><%= pluralize(sessions.length, "Session") %></div>
           <% end %>
           <% sessions.each do |session| %>
             <%= render(

app/views/sessions/show.html.erb

@@ -48,7 +48,7 @@
 
               <%= content_tag(:div, class: [
                   "flex flex-col ml-2",
-                  "max-w-[200px]": @session.speakers.count > 1
+                  "max-w-[200px]": @session.speakers.length > 1
               ] ) do %>
                 <h2 class="text-sm italic font-black group-hover:text-red group-focus:text-red"><%= speaker.name %></h2>
                 <p class="text-sm font-normal text-gray-400"><%= speaker.job_title %></p>
@@ -94,7 +94,7 @@
     <div class="flex flex-col items-center w-full p-5 mt-6">
       <div class="flex flex-col items-start w-full max-w-screen-sm">
         <p class="mb-4 text-2xl italic font-bold text-black">
-          <%= "About the #{'speaker'.pluralize(@session.speakers.count)}" %>
+          <%= "About the #{'speaker'.pluralize(@session.speakers.length)}" %>
         </p>
         <div class="flex flex-col w-full gap-4">
           <% @session.speakers.each do |speaker| %>