On 3 July 2012 15:56, Yusuke Enomoto <mosa...@gmail.com> wrote:
> Hello.I have a question.  I am making chat application to practice RoR.
>
> I have three models. User, Chat, and Message.
> The relationship is that User has many chats(it means chat's host) and many
> message,s  Chat has many messages.
>
> Now I want to create a lobby page like this.
> http://freezing-sword-4391.herokuapp.com/chat/lobby
>
> This page shows all chats sorted by the last message's created_at. each chat
> shows who is chat's host, and what the last message is.
>
> Is there any good way to get resource by ActiveRecord's method?

Sorry, I don't understand the question.
Have you worked right through some tutorials (railstutorial is good
and is free to use online) to understand the basics of rails?  If not
then I suggest you do this.

>
> Besides, the amount of messages will be huge,so is there good way to get all
> chats which have the last message by loading LIMIT 1 message?

You can fetch just the first record of a query by using .first

Colin

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