Ruby on rails 如何销毁rails嵌套表单中的空字段

如何在rails中使用“reject_if”。并销毁空字段或空白字段

我用的是这行代码

 accepts_nested_attributes_for :user_twitter_reals,:allow_destroy => true, :reject_if => lambda { |a| a.destroy if a[:twitter_url].blank? }#,reject_if:proc { |user_twitter_reals_attributes| attributes.all? { |key, value| key == '_destroy' || value.blank? } }
  accepts_nested_attributes_for :user_twitter_chipcounts,:allow_destroy => true, :reject_if => lambda { |a| a[:twitter_url].blank? }
  accepts_nested_attributes_for :user_twitter_fakes,:allow_destroy => true, :reject_if => lambda { |a| a[:twitter_url].blank? }
  accepts_nested_attributes_for :user_cells,:allow_destroy => true, :reject_if => lambda { |a| a[:cell_number].blank? }
  accepts_nested_attributes_for :user_facebook_personals,:allow_destroy => true, :reject_if => lambda { |a| a[:facebook_url].blank? } 
  accepts_nested_attributes_for :user_facebook_fansites,:allow_destroy => true, :reject_if => lambda { |a| a[:facebook_url].blank? } 
  accepts_nested_attributes_for :user_facebook_fakes,:allow_destroy => true, :reject_if => lambda { |a| a[:facebook_url].blank? } 
  accepts_nested_attributes_for :user_social_account 
  accepts_nested_attributes_for :user_websitess,:allow_destroy => true, :reject_if => lambda { |a| a[:site_url].blank? } 
  accepts_nested_attributes_for :user_wikipedias,:allow_destroy => true, :reject_if => lambda { |a| a[:wikipidea_url].blank? } 
  accepts_nested_attributes_for :user_imdbs,:allow_destroy => true, :reject_if => lambda { |a| a[:imdburl].blank? } 
  accepts_nested_attributes_for :user_googlepluss,:allow_destroy => true, :reject_if => lambda { |a| a[:gooplus_url].blank? } 
  accepts_nested_attributes_for :user_youtubes,:allow_destroy => true, :reject_if => lambda { |a| a[:youtube_url].blank? } 
  accepts_nested_attributes_for :user_myspaces,:allow_destroy => true, :reject_if => lambda { |a| a[:myspace_url].blank? } 
  accepts_nested_attributes_for :user_linkedins,:allow_destroy => true, :reject_if => lambda { |a| a[:linkedin_url].blank? } 
  accepts_nested_attributes_for :user_pinterests,:allow_destroy => true, :reject_if => lambda { |a| a[:pinterest_url].blank? } 
  accepts_nested_attributes_for :usersetting,:allow_destroy => true

试一试

对其他人也一样

接受：user的_嵌套的_属性_，如果=>proc{| attributes | attributes['password']。blank？}

请对嵌套属性执行相同的操作

如果所有属性都为空，则将其视为拒绝

accepts_nested_attributes_for :location, :reject_if => :all_blank, :allow_destroy => true

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请参考

，但我如何在编辑表单上处理它，我们将其设置为空白。

accepts_nested_attributes_for :location, :reject_if => :all_blank, :allow_destroy => true