[英]rails routing - path issue
i've been scratching my head over this, but i keep getting this error 我一直在为此挠头,但我一直收到这个错误
No route matches {:action=>"show", :category_id=>nil, :controller=>"products", :id=>nil} missing required keys: [:category_id, :id]
没有路由匹配{:action =>“ show”,:category_id => nil,:controller =>“ products”,:id => nil}缺少必需的键:[:category_id,:id]
In my simple minded logic whenever i go for category_product_path and pass in the category, i should have the list of products within that category. 按照我头脑简单的逻辑,每当我进入category_product_path并传递类别时,我都应该具有该类别内的产品列表。 But i'm probably missing something.
但是我可能会丢失一些东西。 This is my view file ... where i've tried several stuff without success
这是我的视图文件...在这里我尝试了几种方法而没有成功
<% @products.each do |product| %>
<tr>
<td><%= link_to product.name, category_product_path(@category) %></td>
<td><%= product.category_id %></td>
<td><%= number_to_euro(product.price) %></td>
<td><%= product.stock %></td>
<td><%= image_tag(product.image.thumb) %></td>
<br>
</tr>
<% end %>
This is my routes 这是我的路线
namespace :admin do
resources :categories
resources :products
resources :orders
end
resources :categories, only: [:index, :show] do
resources :products, only: [:index, :show]
end
resources :orders, only: [:new, :create]
And what i assume to be the problem, somewhere in the controllers (not the ones in the admin folder) 我认为是问题所在,在控制器中的某个位置(而不是admin文件夹中的那些)
class CategoriesController < ApplicationController
before_action :set_category, only: [:show]
def index
@categories = Category.all
end
def show
@products = @category.products
end
private
def set_category
@category = Category.find(params[:id])
end
end
class ProductsController < ApplicationController
before_action :set_product, only:[:show]
def index
@products = Product.all
end
def show
end
private
def set_product
@product = Product.find(params[:id])
end
end
You'll need to add both @category
and product
variables to your route: 您需要将
@category
和product
变量都添加到您的路线中:
<%= link_to product.name, category_product_path(@category, product) %>
-- -
Update 更新
I don't know where you're calling your view, but if I'm right in thinking it's categories/:category_id/products/
, then @category
isn't being set: 我不知道您要在何处调用视图,但是如果我正确地认为它是
categories/:category_id/products/
,则不会设置@category
:
#app/controllers/products_controller.rb
class ProductsController < ApplicationController
def index
@category = Category.find params[:category_id]
@products = @category.products
end
end
If you're not doing this, it does suggest your @category
value is not present. 如果您不这样做,则表明您的
@category
值不存在。 To test this, manually insert a @category
value: 要对此进行测试,请手动插入
@category
值:
<%= link_to product.name, category_product_path("2", product) %>
Tip: Multiple resource declarations 提示: 多个资源声明
#config/routes.rb
namespace :admin do
#needs a root
resources :categories, :products, :orders
end
resources :categories, only: [:index, :show] do
resources :products, only: [:index, :show]
end
resources :orders, only: [:new, :create]
对于嵌套的资源路由,您必须传递类别和产品的ID /对象:
<%= link_to product.name, category_product_path([product.category_id, product.id]) %>
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