導軌 - 嵌套形式不保存我的記錄

Question

隨着我的模型：

class Lab < ApplicationRecord 
    has_many :business_days, dependent: :destroy 
    accepts_nested_attributes_for :business_days, reject_if: lambda {|attributes| attributes['kind'].blank?} 
    # ... 
end 

控制器：

def new 
    @lab = Lab 
    7.times { @lab.business_days.build} 
end 

我創建了一個表格，以我的實驗室記錄保存到數據庫中。我想提供工作日保存在一個鏡頭，所以我說這一點：

<table class="table table-default"> 
    <thead> 
     <tr> 
     <th></th> 
     <% @weekdays.each do |day| %> 
      <th class="text-center"><%= day[0..2].capitalize %></th> 
     <% end %> 
     </tr> 
    </thead> 
    <tbody> 
     <tr> 
     <th style="vertical-align: middle;">From:</th> 
     <% @lab.business_days.each.with_index do |bd, index| %> 
      <%= f.fields_for :business_days_attributes, index: index do |bd_form| %> 
      <%= bd_form.hidden_field :day, value: @weekdays[index] %> 
      <td><%= bd_form.text_field :from_time %></td> 
      <% end %> 
     <% end %> 
     </tr> 
     <tr> 
     <th style="vertical-align: middle;">To:</th> 
     <% @lab.business_days.each.with_index do |bd, index| %> 
      <%= f.fields_for :business_days_attributes, index: index do |bd_form| %> 
      <td><%= bd_form.text_field :to_time %></td> 
      <% end %> 
     <% end %> 
     </tr> 
    </tbody> 
</table> 

和它的作用是在圖片說明：

我創建行動看起來是這樣的：

def create 
    @lab = Lab.new(lab_params) 
    if @lab.save 
end 

而且lab_params的定義是這樣的：

def lab_params 
    return params.require(:lab).permit(:name, :street, :city, :postal_code, :state, :country, business_days_attributes: [:day, :from_time, :to_time]) 
end 

我的問題是當我保存嘗試提交表單時，Lab記錄被保存但沒有創建/保存BusinessDay記錄。

我的問題是 - 我在哪裏犯了一個錯誤？

編輯 - 參數數量的要求：

Started POST "/labs" for ::1 at 2016-09-19 17:15:40 +0200 
Processing by LabsController#create as HTML 
    Parameters: {"utf8"=>"✓", "authenticity_token"=>"sbiXra6IQBpleuCqZ+zUFN+mDAzjSa/b9VgCYz6kL2VyeTkiqcldy5SOVXJCHr3HrWbUMCjtlBUrjXOBrWOhHA==", "lab"=>{"name"=>"Laboratory Uno", "street"=>"some street", "city"=>"some city", "business_days_attributes"=>{"0"=>{"day"=>"monday", "from_time"=>"00:00", "to_time"=>"15:00"}, "1"=>{"day"=>"tuesday", "from_time"=>"", "to_time"=>""}, "2"=>{"day"=>"wednesday", "from_time"=>"", "to_time"=>""}, "3"=>{"day"=>"thursday", "from_time"=>"", "to_time"=>""}, "4"=>{"day"=>"friday", "from_time"=>"", "to_time"=>""}, "5"=>{"day"=>"saturday", "from_time"=>"", "to_time"=>""}, "6"=>{"day"=>"sunday", "from_time"=>"", "to_time"=>""}}}, "commit"=>"Add to database"} 
    User Load (1.2ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 1], ["LIMIT", 1]] 
    (0.4ms) BEGIN 
    SQL (0.6ms) INSERT INTO "labs" ("name", "street", "city", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5) RETURNING "id" [["name", "Laboratory Uno"], ["street", "some street"], ["city", "some city"], ["created_at", 2016-09-19 15:15:40 UTC], ["updated_at", 2016-09-19 15:15:40 UTC]] 
    (0.5ms) COMMIT 
Redirected to http://localhost:3000/labs/7 
Completed 302 Found in 17ms (ActiveRecord: 2.6ms) 

編輯2 - 移除後reject if

...params... 
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 1], ["LIMIT", 1]] 
    (0.1ms) BEGIN 
    (0.8ms) ROLLBACK 
...redirect 

編輯3 - 從控制器節能與爆炸 我所做的一切是添加一個「！」做我的控制器：

@lab = Lab.new(lab_params) 
    if @lab.save! 
.... 

，結果是這個錯誤：

驗證失敗：工作日實驗室必須存在

如此看來，實驗室記錄不會被保存，這就是爲什麼工作日不能創建，對吧？

Answer 1

你強大的參數不接受你的標識符爲你的日子。取而代之的是：

def lab_params 
    return params.require(:lab).permit(:name, :street, :city, :postal_code, :state, :country, business_days_attributes: [:day, :from_time, :to_time]) 
end 

使用此：

def lab_params 
    return params.require(:lab).permit(:name, :street, :city, :postal_code, :state, :country, business_days_attributes: [:business_day_id, :day, :from_time, :to_time]) 
end 

或

def lab_params 
    return params.require(:lab).permit(:name, :street, :city, :postal_code, :state, :country, business_days_attributes: [:id, :day, :from_time, :to_time]) 
end 

Answer 2

而且我得到了它。 問題可能是實驗室在工作日之前未被保存。

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