Question

我正在尝试接受_nested_attributes_for，但它没有正确拒绝。以下是两种模式：

民意测验

class Poll < ActiveRecord::Base

  has_many :poll_options, :dependent => :destroy
  accepts_nested_attributes_for :poll_options, :reject_if => proc { |attributes| attributes['title'].blank? }

POLLOPTION

class PollOption < ActiveRecord::Base

  belongs_to :poll

我使用3个poll_options构建一个民意调查表单，但如果你填写3个中的2个，则不会删除第3个。这是日志：

Started POST "/polls/50" for 127.0.0.1 at Sun Jun 26 16:31:52 -0700 2011
  Processing by PollsController#update as JS
  Parameters: {"poll"=>{"title"=>"Poll Options (2 only).3", "poll_options_attributes"=>{"0"=>{"title"=>"AAA", "id"=>"145"}, "1"=>{"title"=>"BBBB", "id"=>"146"}, "2"=>{"title"=>"", "id"=>"147"}}}, "commit"=>"Publish", "authenticity_token"=>"KaQrzinP3GNey9zN+sc0vAWU+VeUX1TRFSnQSscW7IA=", "utf8"=>"✓", "id"=>"50"}

控制器

   @poll = Poll.new(:user_id => current_user)

    3.times do
      option = @poll.poll_options.build
    end

表格

<%= form_for(@poll, :remote => true) do |f| %>
    <%= f.text_field :title %>
    <%= f.fields_for :poll_options do |f| %>
        <%= f.text_field :title %>
    <% end %>
    <%= f.submit :class => '', :value => 'Publish' %>
<% end %>

知道我做错了什么吗？感谢

Answer 1

在您的民意调查模型中尝试此操作。

accepts_nested_attributes_for :poll_options, :reject_if => lambda { |a| a[:title].blank? }, :allow_destroy => true

这个railscast很好地涵盖了嵌套模型：http://railscasts.com/episodes/196-nested-model-form-part-1

accepts_nested_attributes_for - 如何拒绝空巢？

1 个答案: