Reduce number of roles queries for the admin controller (#631)

app/helpers/application_helper.rb

@@ -106,7 +106,7 @@ module ApplicationHelper
   # Returns the page that the logo redirects to when clicked on
   def home_page
     return root_path unless current_user
-    return admins_path if current_user.has_role? :super_admin
+    return admins_path if current_user.has_cached_role? :super_admin
     current_user.main_room
   end
 end

app/helpers/rooms_helper.rb

@@ -37,7 +37,7 @@ module RoomsHelper
 
     # Does not apply to admin or users that aren't signed in
     # 15+ option is used as unlimited
-    return false if current_user&.has_role?(:admin) || limit == 15
+    return false if current_user&.has_cached_role?(:admin) || limit == 15
 
     current_user.rooms.length >= limit
   end
@@ -46,7 +46,7 @@ module RoomsHelper
     # Get how many rooms need to be deleted to reach allowed room number
     limit = Setting.find_or_create_by!(provider: user_settings_provider).get_value("Room Limit").to_i
 
-    return false if current_user&.has_role?(:admin) || limit == 15
+    return false if current_user&.has_cached_role?(:admin) || limit == 15
 
     @diff = current_user.rooms.count - limit
     @diff.positive? && current_user.rooms.pluck(:id).index(room.id) + 1 > limit

app/helpers/sessions_helper.rb

@@ -61,7 +61,7 @@ module SessionsHelper
 
   # Retrieves the current user.
   def current_user
-    @current_user ||= User.find_by(id: session[:user_id])
+    @current_user ||= User.where(id: session[:user_id]).includes(:roles).first
   end
 
   def generate_checksum(user_domain, redirect_url, secret)

app/helpers/theming_helper.rb

@@ -31,7 +31,7 @@ module ThemingHelper
 
   # Returns the user's provider in the settings context
   def user_settings_provider
-    if Rails.configuration.loadbalanced_configuration && current_user && !current_user&.has_role?(:super_admin)
+    if Rails.configuration.loadbalanced_configuration && current_user && !current_user&.has_cached_role?(:super_admin)
       current_user.provider
     elsif Rails.configuration.loadbalanced_configuration
       @user_domain