ruby-on-rails - Rails，祖先 gem，填充具有两个深度级别的下拉列表

Question

我按照https://github.com/stefankroes/ancestry的说明成功安装了祖先 gem ，我的类别表如下所示： 类别（id、category_name、ancestry、created_at、updated_at）

我想根据 parent->sub-category->sub-sub-category 进行选择：

此时使用代码（取自https://github.com/stefankroes/ancestry/wiki/Creating-a-selectbox-for-a-form-using-ancestry）我只能设法获得不正确的关注。

Answer 1

Your data is wrong. To model this structure you should have ancestry column properly filled-in. It should contain whole path from the root node (ids of the elements) sepatared by '/'. For example for Watches it should be 5/13 so as it was displayed under Clothes (Id: 13)