在插件中添加一个自定义的每用户设置

[JQ331]

这篇帖子非常有用，清晰地展示了一个设置用户自定义字段的简单示例。是否有类似的内容可以指导如何设置一个简单的主题自定义字段？我正在尝试解决以下问题：

How to add a super basic topic custom field

I’m trying to understand how to add a custom field to topics, and working through a very basic example. Goal: Add a custom field called “sample_field” to each topic created, with a simple string value. I’ve reviewed various examples, like the poll plugin and the solved plugin and this discussion, but these plugins do so much more with their custom fields that I haven’t yet figured out the basic code you need. So I’m not quite there–my plugin.rb file is missing something (I think), and I haven’…

但尚未成功。非常希望能得到任何帮助。