Question

我是铁杆新手。我为shop_products的索引定义了控制器，如下所示

shop_profile.rb

class ShopProfile < ActiveRecord::Base
  has_and_belongs_to_many :users
  has_one :shop_inventory_detail
end

shop_product.rb

class ShopProduct < ActiveRecord::Base
  belongs_to :shop_profile
end

shop_products_controller.rb

class ShopProductsController < ApplicationController
  def index
    @shop_profile = ShopProfile.find(params[:shop_profile_id])
    @products = @shop_profile.shop_products
  end
end

shopprofiles中的

index.html.erb

<%= link_to 'All Products', shop_profile_shop_products_path(@shop_profile) ,class: 'btn btn-primary' %>

在这一行我得到错误

ActionController::UrlGenerationError in ShopProfiles#index
Showing /home/mindfire/Desktop/project/training/Rails/grocery-shop/app/views/shop_profiles/index.html.erb where line #4 raised:

No route matches {:action=>"index", :controller=>"shop_products", :shop_profile_id=>nil} missing required keys: [:shop_profile_id]

路线

shop_profile_shop_products     GET    /users/shop_profiles/:shop_profile_id/shop_products(.:format)          shop_products#index
                               POST   /users/shop_profiles/:shop_profile_id/shop_products(.:format)          shop_products#create
 new_shop_profile_shop_product GET    /users/shop_profiles/:shop_profile_id/shop_products/new(.:format)      shop_products#new
edit_shop_profile_shop_product GET    /users/shop_profiles/:shop_profile_id/shop_products/:id/edit(.:format) shop_products#edit
     shop_profile_shop_product GET    /users/shop_profiles/:shop_profile_id/shop_products/:id(.:format)      shop_products#show
                               PATCH  /users/shop_profiles/:shop_profile_id/shop_products/:id(.:format)      shop_products#update
                               PUT    /users/shop_profiles/:shop_profile_id/shop_products/:id(.:format)      shop_products#update
                               DELETE /users/shop_profiles/:shop_profile_id/shop_products/:id(.:format)      shop_products#destroy

当我手动传递shop_profile_id时，我会得到所需的页面。提前感谢您的帮助。

shop_profiles_controller.rb

class ShopProfilesController < ApplicationController
 before_action :authenticate_user!, except: :show
 after_action :verify_authorized, only: :shop_index

 def new
    @shop = ShopProfile.new
 end

 def index
    @shops = current_user.shop_profiles
 end

 def show
    @shop_profile = ShopProfile.find_by(id: params[:id])
    @items = @shop_profile.shop_products.group(:category_id).where(category_id: params[:category_id])
 end

 def create
    @shop = ShopProfile.new(shop_params)
    @shop.build_address(address_params_shopkeeper)
    if current_user.shop_profiles << @shop
        flash[:success] = 'Shop Details added'
        redirect_to root_path
    else
        flash[:error] = 'Shop Details not added'
        render 'new'
    end
 end

 def edit
    @shop = current_user.shop_profiles.find_by(id: params[:id])
 end

 def update
    @shop = current_user.shop_profiles.find_by(id: params[:id])
    if @shop.update_attributes(shop_params) and @shop.address.update_attributes(address_params_shopkeeper) 
        flash[:success] = 'Updated Successfully'
        redirect_to shop_profiles_path
    else
        flash[:danger] = 'Shop Details not Updated'
        render 'edit'
    end
 end
end

但我认为这与shop_profiles_controller无关。我从那里调用了shop_product索引页面。

错误日志

Started GET "/users/shop_profiles" for 127.0.0.1 at 2016-03-31 16:36:34 +0530
Processing by ShopProfilesController#index as HTML
User Load (0.4ms)  SELECT  `users`.* FROM `users` WHERE `users`.`id` = 3  ORDER BY `users`.`id` ASC LIMIT 1
Rendered shop_profiles/index.html.erb within layouts/application (2.3ms)
Completed 500 Internal Server Error in 8ms (ActiveRecord: 0.4ms)

ActionView::Template::Error (No route matches {:action=>"index", :controller=>"shop_products", :shop_profile_id=>nil} missing required keys: [:shop_profile_id]):
 1: <div>
 2:     <%= link_to 'Add Shop' ,new_shop_profile_path, class: 'btn btn-primary' %>
 3:     <%= link_to 'Add New Product', new_product_path, class: 'btn btn-primary', method: :get %>
 4:     <%= link_to 'All Products', shop_profile_shop_products_path(@shop_profile) ,class: 'btn btn-primary' %>
 5: </div>
 6: <div>
 7:     <% if !@shops.nil? %>
app/views/shop_profiles/index.html.erb:4:in   `_app_views_shop_profiles_index_html_erb___2474323268141556614_25251260'


 Rendered /home/mindfire/.rvm/gems/ruby-2.2.0@localshop/gems/actionpack-4.2.5.1/lib/action_dispatch/middleware/templates/rescues/_source.erb (9.0ms)............

Answer 1

谢谢@Зелёный

从您的错误日志中，您发现正在尝试在导致此问题的nil中发送shop_profile_shop_products_path。

确保@shop_profile不是nil。

如果您想避免此问题，可以执行以下操作：

<%= link_to 'All Products', shop_profile_shop_products_path(@shop_profile) ,class: 'btn btn-primary' if @shop_profile.present? %>

希望它能解决你的问题！

Answer 2

谢谢大家的回复。问题是用户可以拥有多个商店档案。因此，我遍历所有商店配置文件并调用索引方法并获得所需的页面。

ShopProfiles中的ActionController :: UrlGenerationError #index

2 个答案: