rails 4 iframe路由错误

Question

我关注这个 tutorial 只是为了了解更多关于实现 coffeescript 的信息。

我的模特是

class Url < ActiveRecord::Base

  validates :url, presence: true

end

控制器

class UrlsController < ApplicationController
  def new
    @shortened_url = Url.new
  end

  def create
    @shortened_url = Url.new(url_params)
    if @shortened_url.save
      flash[:shortened_id] = @shortened_url.id
      redirect_to new_url_url
    else
      render :action => "new"
    end
  end

  def show
    @shortened_url = Url.find(params[:id])
    redirect_to @shortened_url.url

  end

  private

  def url_params

    params.require(:url).permit(:url)

  end
                                                                              end

结束

咖啡脚本

$(document).ready ->
  preview = $("#preview-url")
  $('#url_url').keyup ->
    current_value = $.trim @value
    if current_value is ''
      preview.hide().attr 'src', ''
    else
      preview.show().attr 'src', current_value

app/views/layouts/application.rb

<!DOCTYPE html>
<html>
<head>
  <title>Shorty</title>
  <%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track' => true %>
  <%= javascript_include_tag 'application', 'data-turbolinks-track' => true %>
  <%= csrf_meta_tags %>
</head>
<body>

<% if flash[:shortened_id].present? %>
  <p class='shortened-link'>
    The shortened url is available <%= link_to 'here',
url_url(flash[:shortened_id]) %>.
    (Right click and copy link to share it).
  </p>
<% end %>


<%= yield %>

</body>
</html>

app/views/urls/new.html.erb

<h1>Add a new URL</h1>
<%= form_for @shortened_url do |form| %>

  <p>
    <%= form.label :url, "Your URL:" %>
    <%= form.text_field :url %>
  </p>

  <% if @shortened_url.errors[:url].any? %>
    <p class='error-messages'>
      The given url <%= @shortened_url.errors[:url].to_sentence %>.
    </p>
  <% end %>

  <p class='buttons'>
    <%= form.submit "Shorten my URL" %>
  </p>

<% end %>

<iframe id='preview-url' style='width: 600px; height: 400px; display: none'></iframe>

config/routes.rb

Rails.application.routes.draw do

  resources :urls, :only => [:new, :show, :create]

 # get '/', to: 'urls#create', as: :new_url_url

  root :to => redirect('/urls/new')
end

错误是

没有路由匹配 [GET] "/urls/www.rte.ie"

我假设正在执行 coffeescript，因为上面的地址是我在文本框中输入的 url 并且 iframe 在提供 url 之前是不可见的

Answer 1

您似乎需要将协议添加到 url，否则当您在 show 操作中执行 redirect_to @shortened_url.url 时重定向将不起作用。你可以在你的模型中使用 before_save 像这样：

class Url < ActiveRecord::Base
  before_save :ensure_protocol

  private

  def ensure_protocol
    self.url = "http://#{url}" unless url_protocol_present?
  end

  def url_protocol_present?
    u = URI.parse(url)
    u.scheme
  end
end

此外，我认为您的 new 操作有错别字：redirect_to 语句中的 new_url 是什么？

rails 4 iframe路由错误

rails 4 iframe routing error

iframe

coffeescript

ruby-on-rails-4