permitir a les usuaries elegir idioma y registrarse con ese

app/controllers/application_controller.rb

@@ -54,7 +54,7 @@ class ApplicationController < ActionController::Base
   # corresponde con el idioma de los artículos, porque puede querer
   # traducirlos.
   def set_locale(&action)
-    I18n.with_locale(current_locale(include_params: false), &action)
+    I18n.with_locale(current_locale(include_params: params[:controller].start_with?('devise')), &action)
   end
 
   # Muestra una página 404

app/models/usuarie.rb

@@ -9,6 +9,8 @@ class Usuarie < ApplicationRecord
   validates_uniqueness_of :email
   validates_with EmailAddress::ActiveRecordValidator, field: :email
 
+  before_create :lang_from_locale!
+
   has_many :roles
   has_many :sites, through: :roles
 
@@ -36,4 +38,11 @@ class Usuarie < ApplicationRecord
     increment_failed_attempts
     lock_access! if attempts_exceeded? && !access_locked?
   end
+
+  private
+
+  def lang_from_locale!
+    binding.pry
+    self.lang = I18n.locale.to_s
+  end
 end

app/views/devise/registrations/new.haml

@@ -8,7 +8,7 @@
 
     = form_for(resource,
       as: resource_name,
-      url: registration_path(resource_name)) do |f|
+      url: registration_path(resource_name, params: { locale: params[:locale] })) do |f|
 
       = render 'devise/shared/error_messages', resource: resource
 

app/views/devise/shared/_links.haml

@@ -1,35 +1,37 @@
 %hr/
 
+- locale = params.permit(:locale)
+
 - if controller_name != 'sessions'
-  = link_to t('.sign_in'), new_session_path(resource_name)
+  = link_to t('.sign_in'), new_session_path(resource_name, params: locale)
   %br/
 
 - if devise_mapping.registerable? && controller_name != 'registrations'
-  = link_to t('.sign_up'), new_registration_path(resource_name),
+  = link_to t('.sign_up'), new_registration_path(resource_name, params: locale),
     class: 'btn btn-lg btn-block btn-success'
   %br/
 
 - if devise_mapping.recoverable?
   - unless %w[passwords registrations].include?(controller_name)
     = link_to t('.forgot_your_password'),
-              new_password_path(resource_name)
+      new_password_path(resource_name, params: locale)
     %br/
 
 - if devise_mapping.confirmable? && controller_name != 'confirmations'
   = link_to t('.didn_t_receive_confirmation_instructions'),
-    new_confirmation_path(resource_name)
+    new_confirmation_path(resource_name, params: locale)
   %br/
 
 - if devise_mapping.lockable?
   - if resource_class.unlock_strategy_enabled?(:email)
     - if controller_name != 'unlocks'
       = link_to t('.didn_t_receive_unlock_instructions'),
-                new_unlock_path(resource_name)
+        new_unlock_path(resource_name, params: locale)
       %br/
 
 - if devise_mapping.omniauthable?
   - resource_class.omniauth_providers.each do |provider|
     = link_to t('.sign_in_with_provider',
                 provider: OmniAuth::Utils.camelize(provider)),
-              omniauth_authorize_path(resource_name, provider)
+              omniauth_authorize_path(resource_name, provider, params: locale)
     %br/

app/views/layouts/_breadcrumb.haml

@@ -22,3 +22,6 @@
       %li.nav-item
         = link_to t('.logout'), destroy_usuarie_session_path,
           method: :delete, role: 'button', class: 'btn'
+  - else
+    - other_locale = I18n.available_locales.find { |locale| locale != I18n.locale }
+    = link_to t(other_locale), "?locale=#{other_locale}"