我有三个模型，Subscription，Show和Episode。Subscription的作用是解析其:url列中的提要并实例化Show和Episode，用 Feedjira 属性填充它们的列。
我只能在访问时访问剧集，在显示视图中shows/1/episodes/1使用不起作用并且不会给出任何错误。<%= render @show.episodes %>Shows
在 Rails 入门指南中，他们使用 this 作为他们的Commentcreate 方法，这是允许的。
@article = Article.find(params[:article_id])
@comment = @article.comments.create(comment_params)
redirect_to article_path(@article)
是因为缺少参数导致这种情况吗？如果是这样，我将如何在此方法中使用参数？
def create
@subscription = Subscription.new(subscription_params)
if @subscription.save
@show = Show.new
@episodes = []
# Feed
@feed = Feedjira::Feed.fetch_and_parse @subscription.url
# Show
@show.title = @feed.title
@show.description = @feed.description
@show.genre = @feed.itunes_categories
@show.url = @feed.url
@show.logo = @feed.itunes_image
@show.save
# Episode
@feed.entries.each do |item|
@episodes.push(item)
end
@episodes.each do |item|
@episode = @show.episodes.create
@episode.title = item.title
@episode.description = item.summary
@episode.release_date = item.published
@episode.show_id = @show
@episode.save
end
redirect_to @subscription
end
end
episodes/_episode.hmtl.erb
<ul>
<li>
<%= episode.title %>
</li>
<li>
<%= episode.description %>
</li>
<li>
<%= episode.url %>
</li>
<li>
<%= episode.release_date %>
</li>
<li>
<%= episode.show_id %>
</li>
</ul>
shows/show.html.erb
<h1>Showing Show</h1>
<h2><%= @show.title %></h2>
<%= render @show.episodes %>
添加我的路线和模型以防出现问题：
routes.rb
Rails.application.routes.draw do
resources :shows do
resources :episodes
end
resources :subscriptions
root 'subscriptions#index'
end
show.rb
class Show < ActiveRecord::Base
has_many :episodes, dependent: :destroy
end
episode.rb
class Episode < ActiveRecord::Base
belongs_to :show
end
subscription.rb
class Subscription < ActiveRecord::Base
validates :url, uniqueness: true
end