ruby-on-rails - reject_if 选项被忽略

Question

这是（简化的）代码：

class Biosimilar::AdverseEvent < ActiveRecord::Base

  attr_accessibile :adverse_event_med_conds_attributes

  has_many :adverse_event_med_conds, 
      :class_name => 'Biosimilar::AdverseEventMedCond', 
      :dependent => :destroy
  has_many :med_conds, 
      :class_name => 'Biosimilar::MedCond', 
      :through => :adverse_event_med_conds

  accepts_nested_attributes_for :adverse_event_med_conds,
      :allow_destroy => true,
      :reject_if => proc { |attributes| attributes.any? {|k,v| v.blank?} }
end    

提交表单时，即使用户将“med_cond_id”字段为空，也会在“adverse_event_med_conds”表中创建记录。reject_if 不起作用！

有什么建议么？

Answer 1

好吧，算了。上面的代码是正确的！问题出在控制器中，我不小心在“show”方法中留下了以下几行：

if @adverse_event.adverse_event_med_conds.size == 0
  @adverse_event.adverse_event_med_conds.build
end

...并且“构建”调用是导致记录创建的调用。