如何在我的 Rails 应用程序上放置一个选择框来选择网站的语言？答案

【问题标题】：How can I put a select box on my rails application to choose the language of the site?如何在我的 Rails 应用程序上放置一个选择框来选择网站的语言？
【发布时间】：2014-08-05 12:40:49
【问题描述】：

我是 Rails 新手，我已经学会了如何使用语言环境来更改我的网站语言，但我想在我的导航栏右侧放置一个选择框，它可以传递变量/会话来更改整体网站语言。那可能吗？我正在使用带有 Ruby 的 Windows：1.9.3，Rails：3.2.2

到目前为止，这是我在“layouts/application.html.erb”上的导航栏：

<div class="upmenu">
    <ul align="left">
        <li><a href="/issues"><%=t "nav.issues.list" %></a></li>
        <li><a href="/issues/new"><%=t "nav.issues.new" %></a></li>
        <li><a href="/timeline/index"><%=t "nav.timeline" %></a></li>
        <li><a href="/projects"><%=t "nav.projects" %></a></li>
        <%= yield :nav %>       
    </ul>
    <ul id="language">
        <li><%= select_tag(:lang, options_for_select([['Portuguese', 'pt'], ['English', 'en']])) %></li>
    </ul>
</div>

记住我的 url 使用了以下范围，所以它类似于 >"Localhost:3000/en/issues/"

  scope "/:locale" do

    get "/timeline/index", to: "timeline#index"

    resources :projects

    resources :issues
  end

这是我的路线：

timeline_index GET    /:locale/timeline/index(.:format)    timeline#index
      projects GET    /:locale/projects(.:format)          projects#index
               POST   /:locale/projects(.:format)          projects#create
   new_project GET    /:locale/projects/new(.:format)      projects#new
  edit_project GET    /:locale/projects/:id/edit(.:format) projects#edit
       project GET    /:locale/projects/:id(.:format)      projects#show
               PUT    /:locale/projects/:id(.:format)      projects#update                                                           
               DELETE /:locale/project
               DELETE /:locale/projects/:id(.:format)      projects#destroy                                                          
.:format)            issues#index
        issues GET    /:locale/issues(.:format)            issues#index
               POST   /:locale/issues(.:format)            issues#create                                                             
               PUT    /:locale/projects/:id(.:format)      projects#update
               DELETE /:locale/projects/:id(.:format)      projects#destroy
        issues GET    /:locale/issues(.:format)            issues#index
               POST   /:locale/issues(.:format)            issues#create
     new_issue GET    /:locale/issues/new(.:format)        issues#new
    edit_issue GET    /:locale/issues/:id/edit(.:format)   issues#edit
         issue GET    /:locale/issues/:id(.:format)        issues#show
               PUT    /:locale/issues/:id(.:format)        issues#update
               DELETE /:locale/issues/:id(.:format)        issues#destroy

【问题讨论】：

标签： ruby-on-rails ruby ruby-on-rails-3 drop-down-menu internationalization

【解决方案1】：

是的，这是可能的

在你看来

<li><%= select_tag(:locale, options_for_select([['Portuguese', 'pt'], ['English', 'en']])) %></li>

在您的应用程序控制器中

before_action :set_locale
 def set_locale
    I18n.locale = params[:locale] || I18n.default_locale
  end

【讨论】：

您将始终获得 params[:locale]，因为您的路线配置为将第一个输入作为 params[:locale]