如何在Ruby On Rails中插入注释ajax后通过ajax更新分页

I have a problem but i don't know how to solve it. Can anyone help me? I have Post table, Comment table. Now with a post i will have many comments with pagination on comments. I want to add a comment on that post by ajax, and then update pagination also by ajax. i'm newbie and don't know how to solve it. Help me and thank you very much !I have a problem but i don't know how to solve