Translations.

app/controllers/application_controller.rb

@@ -10,6 +10,11 @@ class ApplicationController < ActionController::Base
 
   rescue_from Pundit::NotAuthorizedError, with: :user_not_authorized
 
+  def update_locale
+    I18n.locale = params[:locale] || I18n.default_locale
+    redirect_back(fallback_location: root_path)
+  end
+
   private
     def authenticate
       if (session_record = Session.find_by(id: cookies.signed[:session_token]))
@@ -33,7 +38,7 @@ def user_not_authorized
     end
 
     def set_locale
-      I18n.locale = params[:locale] || I18n.default_locale
+      I18n.locale = current_user&.language || I18n.default_locale
     end
 
     def set_current_user

app/controllers/languages_controller.rb

@@ -16,6 +16,15 @@ def edit
     @language = Language.find(params[:id])
   end
 
+  def update_locale
+    if current_user.update(language: params[:locale])
+      I18n.locale = params[:locale]
+      redirect_to languages_path, notice: "Locale successfully updated."
+    else
+      redirect_to languages_path, alert: "Failed to update locale."
+    end
+  end
+
   def set_locale
     I18n.locale = params[:locale] || I18n.default_locale
   end

app/models/concerns/role_enum.rb

@@ -4,7 +4,7 @@ module RoleEnum
   extend ActiveSupport::Concern
 
   included do
-    enum role: { owner: 0, admin: 1, editor: 2, viewer: 3 }
+    enum :role, [:owner, :admin, :editor, :viewer]
 
     validates :role, inclusion: { in: roles.keys }
   end

app/models/user.rb

@@ -37,4 +37,7 @@ def others
   after_update if: :password_digest_previously_changed? do
     sessions.where.not(id: Current.session).delete_all
   end
+
+  # Add locale attribute (ensure a migration is created to add this column)
+  # attr_accessor :locale
 end

app/views/languages/index.html.erb

@@ -7,6 +7,6 @@
 <h1>Available Languages</h1>
 <ul>
   <% @languages.each do |locale| %>
-    <li><%= link_to locale, url_for(locale: locale) %></li>
+    <li><%= link_to locale, update_locale_path(locale: locale), method: :post %></li>
   <% end %>
 </ul>

config/routes.rb

@@ -36,6 +36,9 @@
 
   # Route to change locale
   patch "change_locale", to: "settings#change_locale"
+  post "update_locale", to: "languages#update_locale"
+  get "/update_locale", to: "application#update_locale"
+  # get 'update_locale', to: 'application#update_locale'
 
   # Defines the root path route ("/")
   # root "posts#index"

db/migrate/xxxx_add_locale_to_users.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddLocaleToUsers < ActiveRecord::Migration[6.0]
+  def change
+    add_column :users, :locale, :string, default: "en"
+  end
+end