窗體與multiples fields_for rails 4

這是我的問題。（Rails 4）窗體與multiples fields_for rails 4

我有一個購買，我希望能夠在一個表單中同時添加多個purchase_items。

class Purchase < ActiveRecord::Base 
    has_many :purchase_items, :dependent => :destroy 
    accepts_nested_attributes_for :purchase_items 

class PurchasesController < ApplicationController 
    params.require(:purchase).permit(:purchase_items => [:item_id, :amount, :comment]) 


= form_for @purchase do |f| 
    %h2 Passer ma commande personnelle 
    %ul#ul-services 
    - @services.each_with_index do |service_item, index| 
     - index.even? ? float="float:left" : float="float:right" 
     %li.list-services{:style => float} 
     = f.fields_for @purchase.purchase_items.build, name: 'purchase_items', index: "" do |p| 
      = p.hidden_field :item_id, :value => service_item.id 
    = f.submit "Commander", :class => "btn btn-success add-to-cart" , :id => "add-to-cart"

其中@purchase是新購置的

當我提交表單，我總是有一個purchase_item

{"utf8"=>"✓", 
"authenticity_token"=>"yAsIoQPO2qEP+BBPA5UOvjUOM9b4Yh6b8bXy4H71P+c=", 
"purchase"=>{"purchase_item"=>{"item_id"=>"151", 
"amount"=>"0", 
"comment"=>""}}, 
"commit"=>"Commander"}

我無法弄清楚如何讓multile purchase_items在提交結果。我測試了多件事，但仍然陷在同樣的問題。

感謝您的幫助！

來源

2015-09-10 Thounder

嘗試添加'index'選項的'fields_for'方法，'= f.fields_for f.object.purchase_items。 build，index：index do | p | ...' –

完美！那項工作，非常感謝，作爲額外的答案，你能解釋一下，把索引放在那裏有什麼區別？還是非常感謝的地段 – Thounder

要使用陣列狀參數添加index選項給fields_for方法：

= f.fields_for f.object.purchase_items.build, index: index do |p| 
    # some code here

我是同樣的問題，忘記其中我發現這個棘手選項。

快樂編碼！

來源

2015-09-10 19:55:08

這很好，謝謝！ – Thounder

最後一個想法，即使我現在已經購買了所有商品，哈希值爲「purchase」=> {「purchase_item」=>而不是「purchase」=> {「purchase_items」=> – Thounder

您可以嘗試其他選項'fields_for'方法中的'name：'purchase_items''。讓我知道它是否有效。 –

Started POST "/purchases" for 127.0.0.1 at 2015-09-11 11:01:15 +0200 
Processing by PurchasesController#create as HTML 
Parameters: {"utf8"=>"✓", "authenticity_token"=>"yAsIoQPO2qEP+BBPA5UOvjUOM9b4Yh6b8bXy4H71P+c=", "purchase"=>{"type_of"=>"2", "purchase_item"=>[{"item_id"=>"378", "amount"=>"0", "comment"=>""}, {"item_id"=>"184", "amount"=>"0", "comment"=>""}, {"item_id"=>"188", "amount"=>"0", "comment"=>""}, {"item_id"=>"201", "amount"=>"0", "comment"=>""}, {"item_id"=>"199", "amount"=>"0", "comment"=>""}, {"item_id"=>"185", "amount"=>"0", "comment"=>""}, {"item_id"=>"186", "amount"=>"0", "comment"=>""}, {"item_id"=>"193", "amount"=>"0", "comment"=>""}, {"item_id"=>"182", "amount"=>"0", "comment"=>""}, {"item_id"=>"19", "amount"=>"0", "comment"=>""}, {"item_id"=>"196", "amount"=>"2", "comment"=>""}, {"item_id"=>"195", "amount"=>"0", "comment"=>""}, {"item_id"=>"197", "amount"=>"0", "comment"=>""}, {"item_id"=>"191", "amount"=>"0", "comment"=>""}, {"item_id"=>"190", "amount"=>"0", "comment"=>""}]}, "commit"=>"Commander"} 
Unpermitted parameters: purchase_item

日誌clearely表明purchase_item不授權，這應該是的has_many

來源

2015-09-11 09:04:36 Thounder

窗體與multiples fields_for rails 4

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