可以reject_if被用于拒绝嵌套的资源，如果除一人外的所有字段为空？(Can reject_if

我知道，你可以有：

accepts_nested_attributes_for :foo, :reject_if => proc { |a| a[:bar].blank? }

有没有一种方法，而不是说像

accepts_nested_attributes_for :foo, :reject_if => blah[:bar].blank? and flah[:bar].blank?

要么

accepts_nested_attributes_for :foo, :reject_if => all fields except record_date.blank?

谢谢

Answer 1:

我对这个有点晚了，但你可以这样做：

accepts_nested_attributes_for :foo, 
                               reject_if: ->(attributes){ 
                                 attributes.except(:key).values.all?( &:blank? ) 
                               }

Answer 2:

受此启发： https://rails.lighthouseapp.com/projects/8994/tickets/2501-any_blank-and-all_blank-options-for-accepts_nested_attributes_for-reject_if

这种精细工作对我来说：

reject_if: proc { |attributes| attributes.all? {|k,v| v.blank? || ['foo', 'bar', 'baz'].include?(k)} }

您可以替换['foo', 'bar', 'baz'].include?(k)通过k == 'foo' ，如果只有一个例外，但第一语法使得PROC准备好多个的。

文章来源: Can reject_if be used to reject a nested resource if all fields except one is blank?