Rails 4 кокон ActiveRecord :: AssociationTypeMismatch

Question

<%= simple_form_for @order, :html => { :class => 'form-horizontal' } do |f| %> 
    <%= f.input :contact %> 
    <%= f.simple_fields_for :products do |product| %> 
    <%= render 'product_fields', :f => product %> 
    <% end %> 
    <%= link_to_add_association 'add product', f, :products %> 
<%= f.button :submit, :class => 'btn-primary' %> 
<%= link_to t('.cancel', :default => t("helpers.links.cancel")), 
      orders_path, :class => 'btn' %> 
<% end %> 

product_field_for

<%= f.input :name %> 

и

def create 
@order = Order.new(order_params) 

respond_to do |format| 
    if @order.save 
    format.html { redirect_to @order, notice: 'Order was successfully created.' } 
    format.json { render action: 'show', status: :created, location: @order } 
    else 
    format.html { render action: 'new' } 
    format.json { render json: @order.errors, status: :unprocessable_entity } 
    end 
end 
end 

def order_params 
    params.require(:order).permit(:contact, { :products => [:id, :name, :description, :success, :count, :spot, :janpan_price, :taiwan_price, :_destroy ]}).merge(:seller_id => current_seller.id) 
end 

в модели

class Order < ActiveRecord::Base 
belongs_to :seller 
has_many :products 
end 

class Product < ActiveRecord::Base 
belongs_to :order 
end 

, но когда я представить создать

ActiveRecord :: AssociationTypeMismatch в OrdersController # создать продукт (# 70251926707520) ожидается, получил массив (# 70251924853020)

1 # POST /orders.json 

2 def create 

3 @order = Order.new(order_params) 

4 respond_to do |format| 

5 if @order.save 

он будет разбит на линии 3

журнала сервера

Started POST "/orders" for 127.0.0.1 at 2013-09-13 18:49:37 +0800 
Processing by OrdersController#create as HTML 
    Parameters: {"utf8"=>"✓", "authenticity_token"=>"gHR42nO/ivCaOOGdpEvVEo07UNwmUmBw5uoHs+dN+fc=", "order"=>{"export"=>"0", "contact"=>"", "exchange_rate"=>"", "fare"=>"", "fee"=>"", "totalprice"=>"", "bank_name"=>"", "bank_account"=>""}, "commit"=>"Create Order"} 
    Seller Load (0.2ms) SELECT "sellers".* FROM "sellers" WHERE "sellers"."id" = 3 ORDER BY "sellers"."id" ASC LIMIT 1 
    (0.1ms) begin transaction 
    SQL (2.6ms) INSERT INTO "orders" ("bank_account", "bank_name", "contact", "created_at", "export", "seller_id", "updated_at") VALUES (?, ?, ?, ?, ?, ?, ?) [["bank_account", ""], ["bank_name", ""], ["contact", ""], ["created_at", Fri, 13 Sep 2013 10:49:37 UTC +00:00], ["export", false], ["seller_id", 3], ["updated_at", Fri, 13 Sep 2013 10:49:37 UTC +00:00]] 
    (1.8ms) commit transaction 
Redirected to http:// /orders/34 
Completed 302 Found in 11ms (ActiveRecord: 4.6ms) 


Started GET "/orders/34" for 127.0.0.1 at 2013-09-13 18:49:37 +0800 
Processing by OrdersController#show as HTML 
    Parameters: {"id"=>"34"} 
    Order Load (0.3ms) SELECT "orders".* FROM "orders" WHERE "orders"."id" = ? LIMIT 1 [["id", "34"]] 
    Seller Load (0.2ms) SELECT "sellers".* FROM "sellers" WHERE "sellers"."id" = 3 ORDER BY "sellers"."id" ASC LIMIT 1 
    Rendered orders/show.html.erb within layouts/application (6.7ms) 
Completed 500 Internal Server Error in 13ms 

ActionView::Template::Error (undefined method `product' for #<Order:0x007f97e6365260>): 
    15: <dt><strong><%= model_class.human_attribute_name("手續費") %>:</strong></dt> 
    16: <dd><%= @order.fee %></dd> 
    17: <dt><strong><%= model_class.human_attribute_name("商品網頁") %>:</strong></dt> 
    18: <dd><%= @order.product.name %></dd> 
    19: <dt><strong><%= model_class.human_attribute_name("備註") %>:</strong></dt> 
    20: <dd><%= @order.description %></dd> 
    21: <dt><strong><%= model_class.human_attribute_name("數量") %>:</strong></dt> 
    app/views/orders/show.html.erb:18:in `_app_views_orders_show_html_erb__256659907252631377_70145189586620' 


    Rendered /Users/mac/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.2ms) 
    Rendered /Users/mac/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (0.9ms) 
    Rendered /Users/mac/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/template_error.erb within rescues/layout (11.2ms) 

Answer 1

В модели заказа:

accepts_nested_attributes_for :products, allow_destroy: true 

и разрешение products_attributes: [...] в order_params метод

Я думаю, что ваш метод order_params должен выглядеть следующим образом:

def order_params 
    params.require(:order).permit(:contact, products_attributes: [:id, :name, :description, :success, :count, :spot, :janpan_price, :taiwan_price, :_destroy ]).merge(:seller_id => current_seller.id) 
end