Question

嗨，我是铁杆的新手，无法弄清楚我做错了什么我在这里搜索Rails Routing但似乎没有什么对我有用。任何帮助将不胜感激。

所以我在Categories＃show中得到了这个错误ActionController :: UrlGenerationError。使用以下No route matches {:action=>"show", :controller=>"categories", :id=>nil} missing required keys: [:id]

以下是显示错误的代码。

        <a href=""><%= link_to 'Adoption', category_path(@adoption) %></a>

这是我的佣金路线输出

          category_subcategories GET    /categories/:category_id/subcategories(.:format)          subcategories#index
                          POST   /categories/:category_id/subcategories(.:format)          subcategories#create
 new_category_subcategory GET    /categories/:category_id/subcategories/new(.:format)      subcategories#new
edit_category_subcategory GET    /categories/:category_id/subcategories/:id/edit(.:format) subcategories#edit
     category_subcategory GET    /categories/:category_id/subcategories/:id(.:format)      subcategories#show
                          PATCH  /categories/:category_id/subcategories/:id(.:format)      subcategories#update
                          PUT    /categories/:category_id/subcategories/:id(.:format)      subcategories#update
                          DELETE /categories/:category_id/subcategories/:id(.:format)      subcategories#destroy
           categories GET    /categories(.:format)                                     categories#index
                          POST   /categories(.:format)                                     categories#create
         new_category GET    /categories/new(.:format)                                 categories#new
            edit_category GET    /categories/:id/edit(.:format)                            categories#edit
                 category GET    /categories/:id(.:format)                                 categories#show
                          PATCH  /categories/:id(.:format)                                 categories#update
                          PUT    /categories/:id(.:format)                                 categories#update
                          DELETE /categories/:id(.:format)                                 categories#destroy

我的类别以及嵌套在我的侧边栏中的子类别。即使我将它从application.html.erb移到index.html.erb，我仍然会遇到同样的错误。

application.html.erb

  <div class="related">
    <h3>Check Out</h3>
    <br>
    <a href=""><%= link_to 'Adoption', category_path(@adoption) %></a>
      <br>
        <% @adoption.subcategories.each do |subcategory| %>
        <ul>
          <li><%= link_to subcategory.name %></li>
        </ul>
        <% end %>

categories_controller

def index = Category.all
@adoption = @categories[0]
@missing = @categories[1]
@silly = @categories[2]
end

def show
end

routes.rb 只是加入

resources :categories do
  resources :subcategories
end
root 'categories#index'
end

感谢大家和任何能够帮助我的人。

Answer 1

修复您的控制器以填写所有操作的@categories：

before_action :set_categories

def index
end

def show
end

private

def set_categories
  @categories = Category.all
  @adoption = @categories[0]
  @missing = @categories[1]
  @silly = @categories[2]
end

为{em>任何操作呈现了您的application.html.erb，因此您应该为任何操作填写类别。如果您只想在与类别相关的网页上呈现类别，请将代码从application.html.erb移至categories.html.erb。

类别#show中的ActionController :: UrlGenerationError

1 个答案: