The class name of the model that the attachment is part of, underscored and pluralised for your convenience.

文件拥有者的类名的复数形式，多个单词间以下划线连接。

youdao

The class name of the model that the attachment is part of, underscored and pluralised for your convenience.

文件拥有者的类名的复数形式，多个单词间以下划线连接。

youdao