Question

我正在为API编写代码。我将参数分配给类字段。

我有关系， event_file.rb

 has_many :event_file_attachments
 accepts_nested_attributes_for :event_file_attachments

event_file_attachment.rb

mount_uploader :attachment, EventFileUploader
belongs_to :event_file

想要从JOSN获取值并写入嵌套属性

JOSN，

{"event_files"=>{"event_id"=>"1"}, "attachment"=>#<ActionDispatch::Http::UploadedFile:0xc16e4e4 @tempfile=#<Tempfile:/tmp/RackMultipart20141226-5521-12zezuk>, @original_filename="asset.JPG", @content_type="image/jpg", @headers="Content-Disposition: form-data; name=\"attachment\"; filename=\"asset.JPG\"\r\nContent-Type: image/jpg\r\n">}

在控制器中，

data = params[:event_files]


      @event_file = EventFile.new(:event_member_ids => data['event_member_ids'],
                        :user_id => current_user.id,
                        :company_id => @current_company.id,
                        :event_id => data['event_id'],
                        :status => 0)
      @event_file.save

      @event_file_attachment = EventFileAttachment.new(:event_file_id => @event_file.id,
                                                       :status => 0,
                                                       :attachment => params[:attachment])
      @event_file_attachment.save

这是保存嵌套属性的错误方法，如何修改和优化代码....

Answer 1

您创建的关联以及accepts_nested_attribute_for方法将创建一个event_file_attachments_attributes，您可以在其上添加相应的事件文件附件属性，这是一个简单的示例：

在控制器中：

@event_file = EventFile.new(:event_member_ids => data['event_member_ids'],
                    :user_id => current_user.id,
                    :company_id => @current_company.id,
                    :event_id => data['event_id'],
                    :status => 0,
                    :event_file_attachments_attributes => [{"0" => {:attr1 => "value", :attr2 => "value"}},{"1" => {:attr1 => "value", :attr2 => "value"}}])

有关此信息，您可以查看真正有用的railscast http://railscasts.com/episodes/196-nested-model-form-part-1

Accept_nested_attributes_for Controller中的硬编码

1 个答案: