如何删除空白嵌套表单字段？

Question

我如何在rails中使用此代码拒绝嵌套表单中的空白嵌套字段：

class Award < ActiveRecord::Base
  attr_accessible :category, :country_iso,:title, :year,:status ,:nomination_awards_attributes,:sponsor_awards_attributes,:city
  has_many :nomination_awards, dependent: :destroy
  has_many :sponsor_awards, dependent: :destroy


  accepts_nested_attributes_for :nomination_awards, :allow_destroy => true
  accepts_nested_attributes_for :sponsor_awards, :allow_destroy => true#,:reject_if => lambda { |a| a[:sponsor_id].blank? }
  validates :title,:category,:country_iso,:year,:city, :presence => true


end

Answer 1

使用此代码拒绝空白字段 ：reject_if =＆gt; lambda {| a |一个[：sponsor_id] .blank？ }

并且是否存在编辑数据，如果数据存在或构建我们不需要在编辑页面中构建（如果不存在或构建）我们必须在编辑页面上构建....