ruby-on-rails - 将嵌套属性与设计一起使用时的质量分配警告

Question

我在嵌套属性和设计方面遇到了麻烦。与 How do I use nested attributes with the devise model 类似的问题.
据我所知，我已经按照此处的建议进行了所有设置:
Override devise registrations controller

我已经为用户和订阅设置了关联，我有 "accepts_nested_attributes_for" ，并包括 :subscriptions_attributes在 attr_accessible ，但我从设计 Controller 收到警告。

class User < ActiveRecord::Base
    devise :database_authenticatable, :registerable,:recoverable, :rememberable, :trackable, :validatable
    validates_presence_of :first_name, :last_name
    has_many :subscriptions
    accepts_nested_attributes_for :subscriptions
    attr_accessible :first_name, :last_name, :email, :password, :password_confirmation, :remember_me, :subscriptions_attributes    
    ... 
end

——

class Subscription < ActiveRecord::Base
  belongs_to :user
  validates_presence_of :user_id, :chargify_subscription_id, :chargify_product_handle
  attr_accessible :user_id, :chargify_subscription_id, :chargify_product_handle
  ... 
end

设计/注册/new.html.erb :

<%= form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f| %>
    <%= devise_error_messages! %>
    <p><%= f.label :first_name %><br />
      <%= f.text_field :first_name %></p>
    ...

    <%= f.fields_for :subscription do |s| %>
        <p><%= s.label :chargify_subscription_id %><br />
          <%= s.text_field :chargify_subscription_id %></p>
            ...

我收到以下警告:

Started POST "/users" for 127.0.0.1 at Sat May 14 12:38:49 -0700 2011
  Processing by Devise::RegistrationsController#create as HTML
  Parameters: {"commit"=>"Sign up", "authenticity_token"=>"wNZhZgIhYm9CpZfhvDiRBqaJseoO8QvR0Mk9VIybhcI=", "utf8"=>"✓", "user"=>{"password_confirmation"=>"[FILTERED]",        "last_name"=>"9", "subscription"=>{"chargify_product_handle"=>"medium", "chargify_subscription_id"=>"123"}, "password"=>"[FILTERED]", "first_name"=>"9", "email"=>"99@99.     com"}}
WARNING: Can't mass-assign protected attributes: subscription

我试过使用 subscription_attributes (单数)在 attr_accessible但这不起作用。

对我可能做错的事情有什么建议吗？
谢谢。

Answer 1

由于您的 User 和 Subscription 模型之间有 has_many 关联，我相信您需要指定 fields_for :subscriptions而不是 fields_for :subscription .

<%= f.fields_for :subscriptions do |s| %>
    <p><%= s.label :chargify_subscription_id %><br />
      <%= s.text_field :chargify_subscription_id %></p>
        ...

然后 fields_for 范围内的属性将使用 subscriptions_attributes 参数传递，该参数应该可以工作，因为您有 attr_accessible :subscriptions_attributes .

有关嵌套 has_many 关联形式的更多示例，请查看 Rails documentation 的“嵌套属性示例”部分(一对多)。 .