ruby-on-rails - 在更新记录栏时添加关联记录

Question

 def upload_new_incident_attachments
    @attachments.each do |attachment|
        if record.new_record?
          record.images.build(attachment: attachment)
        else
          record.images.create(attachment: attachment)
        end
    end
end

如果创建父模型（保存时），构建关联的记录将自动保存，如果存在验证错误（在子和父中），子属性将不会被保存，我不知道如何处理这个更新父模型，

def update
   if record.update_attributes(incident_params)
     upload_new_record_attachments if @attachments
   end
end

如果在创建子记录时出现验证错误，则父模型已经更新，有没有办法在一次提交中同时更新（创建子记录和更新父记录），或者任何其他方式

标签： ruby-on-railspaperclipnested-attributes

Answer 1

您可以在构建或创建子关联之前检查其父模型是否有效

def update
  # Assign attributes to the parent model
  record.assign_attributes(incident_params)

  if record.valid?
    # Builds or creates images only when there are no validation errors
    upload_new_record_attachments if @attachments

    # Now you can save it and make sure there won't be any validation errors
    record.save
  end
end