未经允许的参数：contact_requests

Question

我沿着http://guides.rubyonrails.org/form_helpers.html#nested-forms尝试以下内容，因为它非常接近我尝试创建的内容。我目前正在使用Rails 4.2测试版。我是真正的新轨道，所以我不知道我要去的地方错了

控制器：

class UsersController < ApplicationController 

    def new 
    @user = User.new 
    @user.contact_requests.build 
    end 

    def create 
    @user = User.new(user_params) 
    end 

    private 

    def user_params 
     # strong_parameters, which requires us to tell Rails exactly which parameters 
     # we want to accept in our controllers 
     params.require(:user).permit(:first_name, :last_name, :email, :phone_number, contact_requests_attributes: [:message]) 
     # params.require(:users).permit! 
    end 
end 

型号：

class User < ActiveRecord::Base 
    # before_save { |user| user.email = user.email.downcase } 
    has_many :contact_requests 
    # validate the presence of the attributes 
    validates(:first_name, presence: true) 
    validates(:last_name, presence: true) 
    validates(:email, presence: true) 
    accepts_nested_attributes_for :contact_requests 

end 

class ContactRequest < ActiveRecord::Base 
    belongs_to :user 
    validates :user_id, presence: true 
    validates :message, presence: true, length: { maximum: 500 } 
end 

形式：

<section id="contact"> 
    <div class="container"> 
    <div class="title-container">Contact Us</div> 
    <div class="title-caption">Reach us at (415)-911-9999</div> 
    <%= form_for(@user, remote: true, id: "contact-form", class: "contact-input") do |f| %> 
     <div class="col-md-12"> 
     <div class="col-md-6"> 
      <div class="contact-input-margin form-group"> 
      <%= f.text_field(:first_name, class: "form-control", placeholder: "First name")%> 
      </div> 
      <div class="contact-input-margin form-group"> 
      <%= f.text_field(:last_name, class: "form-control", placeholder: "Last name") %> 
      </div> 
      <div class="contact-input-margin form-group"> 
      <%= f.email_field(:email, class: "form-control", placeholder: "Email") %> 
      </div> 
      <div class="contact-input-margin form-group"> 
      <%= f.telephone_field(:phone_number, class: "form-control", placeholder: "Phone number") %> 
      </div> 
     </div> 
     <div class="contact-input-margin col-md-6"> 
      <div class="form-group"> 
      <%= f.fields_for :contact_requests do |builder| %> 
       <%= builder.text_area(:message, class: "form-control contact-margin", rows: "8", placeholder: "Message...") %> 
       <% end %> 
      </div> 
     </div> 
     </div> 
     <%= f.submit(class: "btn btn-xl") %> 
    <% end %> 
    </div> 
</section> 

端子输出：

Started POST "/test" for ::1 at 2014-12-03 00:30:09 -0800 
Processing by UsersController#create as JS 
    Parameters: {"utf8"=>"✓", "user"=>{"first_name"=>"bradfffo", "last_name"=>"li", "email"=>"skdljfd@ksdjf", "phone_number"=>"123123", "contact_requests"=>{"message"=>"sdlkfjskdfdsf"}}, "commit"=>"Save User"} 
Unpermitted parameter: contact_requests 
Completed 500 Internal Server Error in 10ms 

ActionView::MissingTemplate (Missing template users/create, application/create with {:locale=>[:en], :formats=>[:js, "application/ecmascript", "application/x-ecmascript", :html, :text, :js, :css, :ics, :csv, :vcf, :png, :jpeg, :gif, :bmp, :tiff, :mpeg, :xml, :rss, :atom, :yaml, :multipart_form, :url_encoded_form, :json, :pdf, :zip], :variants=>[], :handlers=>[:erb, :builder, :raw, :ruby, :coffee, :jbuilder]}. Searched in: 
    * "/Users/bli1/.rvm/gems/ruby-2.1.3/gems/web-console-2.0.0/lib/action_dispatch/templates" 
    * "/Users/bli1/Development/RoR/Boothie/app/views" 
): 
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    Rendered /Users/bli1/.rvm/gems/ruby-2.1.3/gems/web-console-2.0.0/lib/action_dispatch/templates/rescues/missing_template.text.erb (0.3ms) 

条

路线：

Rails.application.routes.draw do 
    root 'home#index' 
    match '/send_mail', to: "home#send_mail", via: "get" 



    get 'test', to: "users#new" 
    post 'test', to: "users#create" 

Answer 1

不要忘记为contact_requests的id属性，您需要修改user_params方法，请参见下面

params.require(:user).permit(:first_name, :last_name, :email, :phone_number, contact_requests_attributes: [:id, :message]) 

我已经加入id属性contact_requests_attributes

此外，您需要使用:user而不是:users，我h大道纠正它以上！

试试看！

Answer 2

你需要改变允许PARAMS

params.require(:user).permit(:first_name, :last_name, :email, :phone_number, contact_requests: {:id, :message})