class PortalResolver
 
 def initialize(app)
   @app = app
 end
 
  def call(env)
    begin
      url = "#{env['rack.url_scheme']}://#{env['HTTP_HOST']}"
      request = Rack::Request.new(env)
      portal_id = DomainService.domain(url) # DomainService is returning the expected value
      request.params['portal_id'] = portal_id
      status,headers,response = @app.call(env)
      [status,response]
    rescue PortalNotFoundError => e
      [403,{'Content-Type' => 'text/html'},['']]
    end
  end
end

我目前正在ActionDispatch :: ParamsParser之后添加中间件.参数不会出现在来自控制器的Rails params散列中,但会显示在request.params散列中(在上面定义的中间件对象中).任何想法？非常感谢.