If you want to display this as a tab, take a look at RailsAdmin's new custom actions.
I just gave some examples and links in my answer to this question.
If you don't want to add this functionality as a custom action, you can:
- Map a route to your controller & action
- Have your controller inherit from RailsAdmin MainController and write code for your action
- Include a view for your action
- Copy a RailsAdmin view over to add it in as a tab
However, I'd recommend the custom action approach because it does not require you to keep your copied RailsAdmin view updated.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…