Rails 应用程序将根请求重定向到 /404

Question

我无法弄清楚为什么我的应用程序无法正常工作。

我有以下routes.rb：

Rails.application.routes.draw do

  root to: 'visitors#index'

  # ... other routes

  # Default root
  get '*path', to: "error#error_404"

end

我在浏览器 url 中输入 http://localhost:3000 并被重定向到 http://localhost:3000/404。日志告诉我一件事：

Started GET "/404" for 127.0.0.1 at 2015-08-31 14:24:50 +0300
Processing by ErrorController#error_404 as HTML
  Parameters: {"path"=>"404"}
  Rendered error/error_404.html.slim within layouts/application (0.8ms)
  Rendered layouts/_navigation_links.html.slim (2.2ms)
  Rendered layouts/_navigation.html.slim (3.2ms)
  Rendered layouts/_messages.html.slim (0.1ms)
  Rendered layouts/_footer.html.slim (0.1ms)
Completed 200 OK in 876ms (Views: 875.3ms | ActiveRecord: 0.0ms)

其他相关文件如下：

visitors_controller.rb

class VisitorsController < ApplicationController

    def index       
        @specializations = Specialization.order(name: :asc)
    end
...

视图/访问者/index.html.slim

- if @specializations.count == 0 
  h3.bg-primary.text-center = I18n.t('layout.no_specializations')

- @specializations.each_with_index do |specialization, index|
  - if index % 3 == 0
    .row
  .col-sm-4
    = link_to specialization
      img src="#{specialization.avatar.url(:thumb)}" /
      p.text-center
        = specialization.name
  - if index % 3 == 2

这可能是什么问题？

附：当我输入例如localhost:3000/specializations/1 时，结果页面会正常加载。

更新

curl localhost:3000 获得正确的 HTML，无需任何重定向。

Answer 1

原来是糟糕的苗条代码。这一行：

img src="#{specialization.avatar.url(:thumb)}" /

应该重构为

img src=specialization.avatar.url(:thumb) /

完成。有效。