ruby-on-rails – Ruby on Rails:如何在特定条件下验证嵌套属性
我有这些模型:
class Organisation < ActiveRecord::Base has_many :people has_one :address,:as => :addressable,:dependent => :destroy accepts_nested_attributes_for :address,:allow_destroy => true end class Person < ActiveRecord::Base attr_accessible :first_name,:last_name,:email,:organisation_id,:address_attributes belongs_to :user belongs_to :organisation has_one :address,:allow_destroy => true # These two methods seem to have no effect at all! validates_presence_of :organisation,:unless => "address.present?" validates_associated :address,:unless => "organisation.present?" end class Address < ActiveRecord::Base belongs_to :addressable,:polymorphic => true validates_presence_of :line1,:line2,:city,:zip end ……以及这些观点: _fields.html.erb: <%= render 'shared/error_messages',:object => f.object %> <fieldset> <div class="left"> <%= f.label :first_name %><br/> <%= f.text_field :first_name %> </div> <div> <%= f.label :last_name %><br/> <%= f.text_field :last_name %> </div> <div> <%= f.label :email %><br/> <%= f.text_field :email %> </div> <div> <%= f.label :organisation_id %><br/> <%= f.select(:organisation_id,current_user.organisation_names,{:include_blank => "--- None ---"},:id => 'organisation_select') %> </div> </fieldset> <%= f.fields_for :address do |address| %> <%= render 'shared/address',:f => address %> <% end %> _address.html.erb: <fieldset id="address_fields"> <div> <%= f.label :line1 %> <%= f.text_field :line1 %> </div> <div> <%= f.label :line2 %> <%= f.text_field :line2 %> </div> <div> <%= f.label :zip %> <%= f.text_field :zip %> </div> <div> <%= f.label :city %> <%= f.text_field :city %> </div> </fieldset> people_controller.rb: def new puts params.inspect @person = Person.new(:organisation_id => params[:organisation_id]) @person.build_address @title = "New person" end {"action"=>"new","controller"=>"people"} def edit puts params.inspect @title = @person.name end {"action"=>"edit","id"=>"69","controller"=>"people"} def create puts params.inspect if params[:organisation_id] @person = current_user.organisations.build_person(params[:person]) else @person = current_user.people.build(params[:person]) end if @person.save flash[:success] = "Person created." redirect_to people_path else render :action => "new" end end {"commit"=>"Create","action"=>"create","person"=>{"last_name"=>"Doe","organisation_id"=>"9","email"=>"john.doe@email.com","first_name"=>"John","address_attributes"=>{"city"=>"Chicago","zip"=>"12345","line2"=>"Apt 1","line1"=>"1 Main Street"}},"authenticity_token"=>"Jp3XVLbA3X1SOigPezYFfEol0FGjcMHRTy6jQeM1OuI=","controller"=>"people","utf8"=>"?"} 在我的Person模型中,我需要确保只有当一个人的organisation_id为空时,该人的地址字段必须存在. 我试过这样的事情: validates :address,:presence => true,:if => "organisation_id.blank?" 但它不起作用. 如何才能做到这一点? 谢谢你的帮助. 解决方法
首先,我想确定你的意思是空白?而不是礼物?通常,我看到这个:
validate :address,:presence_of => true,:if => 'organisation.present?' 意思是,如果组织也存在,您只想验证地址. 关于,:accepts_nested_attributes_for,你是通过传入嵌套的表单属性,还是某些这样的东西来使用这个功能的?我只是想确保你绝对需要使用这个功能.如果您实际上没有处理嵌套表单属性,则可以使用以下方法实现级联验证: validates_associated :address 如果确实需要使用:accepts_nested_attributes,请务必查看:reject_if参数.基本上,如果某些条件适用,您可以完全拒绝添加属性(及其后代): accepts_nested_attributes_for :address,:allow_destroy => true,:reject_if => :no_organisation def no_organisation(attributes) attributes[:organisation_id].blank? end 现在,如果以上都不适用,那么让我们来看看你的语法: 它应该工作,:if /:除非取symbols,strings and procs.你不需要指向foreign_key,但可以通过指向以下内容来简化: :if => "organisation.blank?" 您在地址模型中有其他验证,对吗?地址是否在您不想要的时候被验证?或者地址未经过验证?如果你能给我一些额外的细节,我可以帮你在控制台测试一下. >为了让自己更轻松:重量分配,我更改了rails config:config.active_record.whitelist_attributes = false 基本要点: validates_presence_of:organization,:unless => “address.present?” 我能够满足您的要求.请查看at the gist I created,我有一个完整的控制台测试计划. 我加了a controller file to the previous gist. 概述: >你需要创造的人是: 我通过对the controller,the model和the form的必要更改更新了要点. 概述: >您需要清理控制器.你正在使用accepts_nested_attribute,所以在:create中,你只关心params [:person].此外,在render:new中,您需要设置partial将使用的任何实例变量.这不会通过:新动作返回. :new和:edit操作也需要简化. 一切都在the gist 应该是the final gist. 概述: >在构建@person后立即将以下内容添加到编辑操作中: @ person.build_address if @ person.address.nil? accepts_nested_attributes_for :address,:reject_if => :attributes_blank? def attributes_blank?(attrs) attrs.except('id').values.all?(&:blank?) end 一个. attrs – > params [:person] [:地址]的结果湾.except(‘id’) – >返回除“id”之外的所有键值C. .values – >将散列中的所有值作为数组返回d. .所有? – >数组中的所有元素是否满足以下检查即& ;: blank – >一个块的ruby简写,像这样:全部?{| v | v.blank? } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |