Rails验证不在嵌套模型上运行

问题描述

我在Rails 3.2.8和Ruby 1.9.3上。

我无法弄清楚为什么嵌套属性的验证没有运行或返回任何错误。当我提交没有填写的表单时，我会为父模型（User）返回错误，但不会为子模型（Account）返回错误。在我的代码中下面，我有一个has_one owned_account（帐户模型）的User模型和一个属于所有者（用户模型）的Account模型。帐户模型有一个子域字符串的文本字段。

似乎当我提交表单时不包括子域字段，帐户模型上的验证不运行在所有。关于如何获得验证的任何想法在这里工作？预先感谢您提供任何帮助或指示。

user.rb

  class User< ActiveRecord :: Base 
 attr_accessible：owned_account_attributes 
 has_one：owned_account，：class_name => 'Account'，：foreign_key => 'owner_id'
 
 validates_associated：owned_account 
 accep_nested_attributes_for：owned_account，：reject_if => proc {|属性|属性[的子域。空白？ } 
结束
  

account.rb

  class Account< ActiveRecord :: Base 
 attr_accessible：owner_id，：：subdomain 
 belongs_to：owner，：class_name => 'User'
 
验证：subdomain，
：presence =>真，
：唯一性=> true，
：format => {...一些代码...} 
 end 
  

new.haml

  = form_for @user do | f | 
 ...与用户相关的字段... 
 = f.fields_for：owned_account_attributes do | acct | 
 = acct.label：subdomain 
 = acct.text_field：subdomain 
 = submit_tag ... 
  

users_controller.rb

  class UsersController< ApplicationController 
 def new 
 @user = User.new 
 end 
 $ b def create 
 @user = User.new（params [：user]）
 
 if @ user.save 
 ... 
 end 
 end 
  

$ b $你需要在用户模型中添加 acceptable_nested_attributes_for 方法。像这样：

  class User< ActiveRecord :: Base 
 attr_accessible：owned_account_attributes，＃其他用户属性
 has_one：owned_account，：class_name => 'Account'，：foreign_key => 'owner_id'
 
 accept_nested_attributes_for：owned_account 
 validates_associated：owned_account 
 end 
  

然后您应该看到与父模型（User）上的嵌套模型有关的验证错误：

  [拥有的帐户子域不能为空，拥有的帐户无效] 
  

编辑
$ b 罪魁祸首原来是：reject_if 位如果子域属性是空白的话，有效地指示Rails忽略嵌套的帐户对象（请参阅评论中的讨论）

I'm on Rails 3.2.8 and Ruby 1.9.3.

I'm having trouble figuring out why the validations on the nested attributes are not being run or returning any errors. When I submit the form with nothing filled in, I get errors back for the parent model (User), but not for the child model (Account).

In my code below, I have a User model which has_one owned_account (Account model), and an Account model that belongs_to an owner (User model). The Account model has a text field for a subdomain string.

It seems that when I submit the form without including the subdomain field, the validations on the Account model are not run at all. Any ideas on how I can get the validations here working? Thanks in advance for any help or pointers.

user.rb

class User < ActiveRecord::Base
  attr_accessible :owned_account_attributes
  has_one :owned_account, :class_name => 'Account', :foreign_key => 'owner_id'

  validates_associated :owned_account
  accepts_nested_attributes_for :owned_account, :reject_if => proc { |attributes| attributes['subdomain'].blank? }
end

account.rb

class Account < ActiveRecord::Base
  attr_accessible :owner_id, :subdomain
  belongs_to :owner, :class_name => 'User'

  validates :subdomain,
    :presence => true,
    :uniqueness => true,
    :format => { ...some code... }
end

new.haml

= form_for @user do |f|
  ... User related fields ...
  = f.fields_for :owned_account_attributes do |acct|
    = acct.label :subdomain
    = acct.text_field :subdomain
  = submit_tag ...

users_controller.rb

class UsersController < ApplicationController
  def new
    @user = User.new
  end

  def create
    @user = User.new(params[:user])

    if @user.save
      ...
    end
end

解决方案

You need to add the accepts_nested_attributes_for method to the User model. Like so:

class User < ActiveRecord::Base
  attr_accessible :owned_account_attributes, # other user attributes
  has_one :owned_account, :class_name => 'Account', :foreign_key => 'owner_id'

  accepts_nested_attributes_for :owned_account
  validates_associated :owned_account
end

Then you should see validation errors pertaining to the nested model on the parent model (User):

["Owned account subdomain can't be blank", "Owned account is invalid"]

EDIT

The culprit turned out to be the :reject_if bit in the accepts_nested_attributes_for line that effectively instructed Rails to ignore nested account objects if the subdomain attribute was blank (see discussion in comments)

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