Ruby on Rails，將哈希值傳遞給link_to，而不使用路由中的資源

Question

我是RoR的新手，我正在做一個小應用程序來啓動我。

我有一個供應商頁面，其中列出所有供應商，裏面有一個link_to'新'產品頁面，我可以創建一個新產品，我需要通過link_to將供應商id發送到產品頁面並且被存儲在hidden_​​field_tag值

這裏是我的產品頁面

<%= form_for @product, :url => {:action => "create"} do |f| %> 

     <%= f.label :product_name %> 
     <%= f.text_field :name %> 



     <%= collection_select(:product, :product_category_id, ProductCategory.all, :id, :category, {prompt: 'Select category'}) %> 

     <%= hidden_field_tag(:supplier_id, Supplier.first[:id]) %> 

     <%= f.submit "Create a product", class: "btn btn-primary"%> 

    <% end %>` 

的Supplier.first [：id]，則只是爲了嘗試代碼

，這是我的供應商

頁

<% provide(:title, 'All suppliers') %> 
<h1>All suppliers</h1> 
<ul class="suppliers"> 
    <% @suppliers.each do |supplier| %> 
    <li> 
     <%= link_to supplier.name %> 
     <%= link_to "Add a product", products_path, :class => "btn btn-primary",:method => "get" %> 

     <div> 
      <% if supplier.products.any? %> 
      <h5>Products (<%= supplier.products.count %>)</h5> 
      <ol> 
      <% supplier.products.each do |product| %> 

       <li><%= product.name %></li> 
       <% end %> 
      </ol> 
      <% end %> 
     </div> 
    </li> 
    <% end %> 
</ul> 

任何想法？

編輯：

class ProductsController < ApplicationController 



    def new 
     @product = Product.new 

    end 

    def create 

     @product = Product.new(params[:product]) 
     if @product.save 
      redirect_to "/products" 
     else 
      render 'new' 
     end 
    end 

編輯2： 我的產品型號：

class Product < ActiveRecord::Base 
    attr_accessible :name, :supplier_id, :product_category_id 

    attr_accessor :supplier_id, :product_category_id 


    belongs_to :supplier 

    belongs_to :product_category 

    validates :supplier_id, presence: true 
    validates :product_category_id, presence: true 

end 

，當我運行rake途徑我得到這個：

karam@karam-Inspiron-N5010:~/rails-projects/devise$ rake routes 
     new_admin_session GET /admins/sign_in(.:format)  devise/sessions#new 
      admin_session POST /admins/sign_in(.:format)  devise/sessions#create 
    destroy_admin_session DELETE /admins/sign_out(.:format)  devise/sessions#destroy 
      admin_unlock POST /admins/unlock(.:format)  devise/unlocks#create 
     new_admin_unlock GET /admins/unlock/new(.:format) devise/unlocks#new 
         GET /admins/unlock(.:format)  devise/unlocks#show 
     new_user_session GET /users/sign_in(.:format)  devise/sessions#new 
      user_session POST /users/sign_in(.:format)  devise/sessions#create 
    destroy_user_session DELETE /users/sign_out(.:format)  devise/sessions#destroy 
      user_password POST /users/password(.:format)  devise/passwords#create 
     new_user_password GET /users/password/new(.:format) devise/passwords#new 
     edit_user_password GET /users/password/edit(.:format) devise/passwords#edit 
         PUT /users/password(.:format)  devise/passwords#update 
cancel_user_registration GET /users/cancel(.:format)  devise/registrations#cancel 
     user_registration POST /users(.:format)    devise/registrations#create 
    new_user_registration GET /users/sign_up(.:format)  devise/registrations#new 
    edit_user_registration GET /users/edit(.:format)   devise/registrations#edit 
         PUT /users(.:format)    devise/registrations#update 
         DELETE /users(.:format)    devise/registrations#destroy 
       products POST /products(.:format)   products#create 
      new_product GET /products/new(.:format)  products#new 
       product GET /products/:id(.:format)  products#show 
      suppliers_new  /suppliers/new(.:format)  suppliers#new 
       suppliers  /suppliers(.:format)   suppliers#index 
     suppliers_create  /suppliers/create(.:format) suppliers#create 
           /products(.:format)   products#new 

EDIT3：

男y產品類別型號：

class ProductCategory < ActiveRecord::Base 
    attr_accessible :category 

    has_many :products 


end 

該模型的控制器爲空。

Answer 1

簡單地做：

<%= link_to "Add a product", products_path(supplier_id: supplier.id), :class => "btn btn-primary" %> 

（你不需要:method => "get"因爲link_to默認情況下GET）

此外，以下是不正確的：

<%= link_to supplier.name %> 

而是執行此操作：

<%= link_to supplier.name, supplier_path(supplier) %> 

您應該清理您的控制器如下：

class ProductsController < ApplicationController 
    def new 
    @product = Product.new 
    end 

    def create 
    @product = Product.new(params[:product]) 
    if @product.save 
     redirect_to products_path 
    else 
     render :new 
    end 
    end 
end