带有引擎路线参数的`link_to` [英] `link_to` with parameters for an Engine route

问题描述

(尽管这里讨论的是Blacklight引擎，但我认为问题实际上纯粹是关于Rails的.)

(While this discusses Blacklight engine, I believe the question is actually purely about Rails.)

是否继续从 scope围绕mount无效?(tl; dr :在浏览Rails源代码之后，使引擎路由服从与应用程序路由相同的:locale范围.

Continuing my quest from scope around mount ineffective? (tl;dr: make the engine routes obey the same :locale scope as application routes), after digging through Rails source.

当前，我具有以下设置:

Currently, I have this setup:

# config/routes.rb
Rails.application.routes.draw do      
  Blacklight::Engine.routes.default_scope = { path: "(:locale)", locale: /en|ja/ }
  mount Blacklight::Engine => '/'

  scope "(:locale)", locale: /en|ja/ do
    # ...
  end
end

这使路由正常工作.但是，我有此视图代码来生成指向当前页面的备用语言链接(由

This makes the routes work properly. However, I had this view code to generate the alternate-language links to the current page (guided by link_to the current page plus/merged with a param [duplicate]):

<div id="languages_nav_popup" class="navbar-inverse">                                                                                                                                                          
  <% locales.each do |locale| %>
    <% next if locale == I18n.locale %>
    <%= link_to params.permit!.merge(locale: locale) do %>                                             
      <img src="<%= url_for "/img/flag/#{locale}.png" %>"/>                                            
    <% end %>
  <% end %>
</div>

当当前页面是引擎路线时，link_to失败.这是由于actionpack中的这段代码:

That link_to fails when the current page is an Engine route. This is due to this piece of code in actionpack:

# lib/action_dispatch/journey/formatter.rb
# Skip this route unless a name has been provided or it is a
# standard Rails route since we can't determine whether an options
# hash passed to url_for matches a Rack application or a redirect.
next unless name || route.dispatcher?

使用我上面使用的link_to options, &block语法，name是nil;引擎路线的dispatcher?是false. (如果我通过强行插入名称通过了此检查，则会得到类似.../assets?action=index&controller=saved_searches&locale=ja的毫无意义的URL.)

With link_to options, &block syntax that I use above, name is nil; and dispatcher? is false for an engine route. (If I pass that check by inserting a name by force, I get a nonsensical URL like .../assets?action=index&controller=saved_searches&locale=ja).

我在这里感到绝望，几乎可以想到解决此问题的最佳方法是regexp.这种暴行有效:

I'm getting desperate here, almost to the point where I'm thinking the best way to deal with this is regexp. This atrocity works:

<%= link_to request.base_url + request.original_fullpath.sub(%r{(?<=/)#{I18n.locale}}, locale.to_s) do %

是否无法正确生成正确的URL?

Is there no way to generate the correct URL properly?

推荐答案

另一种完全hacky的解决方案是将引擎路由复制到本地route.rb并添加警告，该警告会在gem更新时触发，以检查它们的更改. :(

Another totally hacky solution is to copy the engine routes to your local routes.rb and add a warning that triggers on gem update to check them for changes. :(

这篇关于带有引擎路线参数的`link_to`的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！