중첩되어있을 때 show action이 잘로드되지 않는 이유

Question

커뮤니티 has_many CommunityTopics
community_topics_controller.rb # show를로드하면 다음과 같은 오류가 발생합니다. 왜?? (예 : http://example.com/shop/walmart/topic/12)
아니야 @community_topic ???

라우팅 오류 없음 경로 일치 {: 컨트롤러 => "community_topics" : community_id => 전무}

내 코드는

community_topics_controller.rb #show

def show 
    @community_topic = CommunityTopic.find(params[:id]) 

    respond_to do |format| 
     format.html # show.html.erb 
     format.json { render json: @community_topic } 
    end 
    end 

views/community_top ICS/show.html.erb

<%- model_class = @community_topic.class -%> 
<div class="page-header"> 
    <h1><%=t '.title', :default => model_class.model_name.human %></h1> 
</div> 

<dl class="dl-horizontal"> 
    <dt><strong><%= model_class.human_attribute_name(:community_id) %>:</strong></dt> 
    <dd><%= @community_topic.community_id %></dd> 
    <dt><strong><%= model_class.human_attribute_name(:user_id) %>:</strong></dt> 
    <dd><%= @community_topic.user_id %></dd> 
    <dt><strong><%= model_class.human_attribute_name(:title) %>:</strong></dt> 
    <dd><%= @community_topic.title %></dd> 
    <dt><strong><%= model_class.human_attribute_name(:body) %>:</strong></dt> 
    <dd><%= @community_topic.body %></dd> 
    <dt><strong><%= model_class.human_attribute_name(:community_topic_icon_file_name) %>:</strong></dt> 
    <dd><%= @community_topic.community_topic_icon_file_name %></dd> 
    <dt><strong><%= model_class.human_attribute_name(:community_topic_icon_content_type) %>:</strong></dt> 
    <dd><%= @community_topic.community_topic_icon_content_type %></dd> 
    <dt><strong><%= model_class.human_attribute_name(:community_topic_icon_file_size) %>:</strong></dt> 
    <dd><%= @community_topic.community_topic_icon_file_size %></dd> 
    <dt><strong><%= model_class.human_attribute_name(:community_topic_icon_updated_at) %>:</strong></dt> 
    <dd><%= @community_topic.community_topic_icon_updated_at %></dd> 
    <dt><strong><%= model_class.human_attribute_name(:deleted_at) %>:</strong></dt> 
    <dd><%= @community_topic.deleted_at %></dd> 
</dl> 

<div class="form-actions"> 
    <%= link_to t('.back', :default => t("helpers.links.back")), 
       community_topic_index_path(@community), :class => 'btn' %> 
    <%= link_to t('.edit', :default => t("helpers.links.edit")), 
       edit_community_topic_path(@community, @community_topic), :class => 'btn' %> 
    <%= link_to t('.destroy', :default => t("helpers.links.destroy")), 
       community_topic_path(@community, @community_topic), 
       :method => 'delete', 
       :confirm => t('.confirm', :default => t("helpers.links.confirm", :default => 'Are you sure?')), 
       :class => 'btn btn-danger' %> 
</div> 

routes.rb

resources :communities, :path => "shop", do 
    resources :community_topics, :path => "topic", :as => :'topic' 
end 

모델/community.rb

def to_param 
    "#{community_name}" 
end 

Answer 1

나는 당신이 @community을 할당이 표시되지 않습니다 변수가 아직 show.html.erb에서 사용 중이므로 경로 도우미가 id 대신 nil

def show 
    @community = Community.find params[:community_id] 
    @community_topic = CommunityTopic.find params[:id] 
    # the rest of the action 
end