[英]Using accepts_nested_attributes_for with rejects_if
I'm using paperclip to attach photos to one of my models: 我正在使用回形针将照片附加到我的其中一个模型上:
class User < ActiveRecord::Base
has_many :photos
accepts_nested_attributes_for :photos
end
class Photo < ActiveRecord::Base
belongs_to :user
has_attached_file :data
end
How can I use reject_if to ignore data fields to which files are not uploaded by users? 如何使用reject_if忽略用户未上传文件的数据字段?
Try: 尝试:
accepts_nested_attributes_for :photos, :reject_if => proc { |attrs| attrs['data'].blank? }
That should effectively ignore any data fields which are left blank by the user. 这应该有效地忽略用户留空的任何数据字段。
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