Spree 3.1：在交付步驟中將選擇標籤添加到裝運表單

Question

我試圖在結算交付中爲裝運表單中的城市添加一個更多選擇標籤。

#views/spree/checkout/_delivery.html.erb 

<%= form.fields_for :shipments do |ship_form| %> 
    <% ship_form.object.shipping_rates.each do |rate| %> 
    <tr class="stock-item"> 
     <td class="shipment-button"><%= ship_form.radio_button :selected_shipping_rate_id, rate.id %></td> 
     <td class="rate-name"><%= rate.name %></td> 
     <td class="item-qty"></td> 
     <td class="rate-cost"><%= rate.display_cost %></td> 
    </tr> 
    <% if rate.shipping_method_id == 4 %> 
     <tr id="city" style="display: none"> 
      <td></td> 
      <td> 
      <%= ship_form.select :selected_city_id, options_from_collection_for_select(@cities, "id", "name"), { :include_blank => true }, { :class => "select-city" } %> 
      </td> 
      <td></td> 
      <td></td> 
     </tr> 
    <% end %> 
<% end %> 

模型發貨：

#models/spree/shipment.rb 

def selected_shipping_rate 
    shipping_rates.where(selected: true).first 
end 

def selected_shipping_rate_id 
    selected_shipping_rate.try(:id) 
end 

def selected_city_id 
    selected_shipping_rate.try(:selected_city_id) 
end 

結賬控制器：

#controller/spree/checkout_controller.rb 

def update 
    if @order.update_from_params(params, permitted_checkout_attributes, request.headers.env) 
    @order.temporary_address = !params[:save_user_address] 
    unless @order.next 
     flash[:error] = @order.errors.full_messages.join("\n") 
     redirect_to(checkout_state_path(@order.state)) && return 
    end 
    if @order.completed? 
     @current_order = nil 
     flash.notice = Spree.t(:order_processed_successfully)  
     flash['order_completed'] = true 
     redirect_to completion_route 
    else 
     redirect_to checkout_state_path(@order.state) 
    end 
    else 
    render :edit 
    end 
end 

選擇框是選擇城市，運輸方法是可行的。

我在表spree_shipments和 添加新的列我還添加方法selected_city_id在models/spree/shippment.rb和允許在初始化新的參數。

但是，當我試圖獲得@order.shipments.order("created_at").last.selected_city_id 我得到NoMethodError: undefined method selected_city_id。

童車後提交這個樣子的：

"order"=>{ 
    "shipments_attributes"=>{ 
    "0"=>{"selected_city_id"=>"10", 
    "selected_shipping_rate_id"=>"10", 
    "id"=>"4"} 
    } 
} 

我覺得我缺少的東西在這裏... 請有人可以幫助我，如何保存在數據庫selected_city_id？是否應將其保存在不同的表格中（spree_shipping_rates）？

感謝

Answer 1

解決方案：

我加在貨物模型多了一個方法

#models/spree/shipment.rb 

def selected_shipping_rate 
    shipping_rates.where(selected: true).first 
end 

def selected_shipping_rate_id 
    selected_shipping_rate.try(:id) 
end 

def selected_city_id 
    selected_shipping_rate.try(:selected_city_id) 
end 

def selected_city_id=(id) 
    selected_shipping_rate.update(selected_city_id: id) 
end