i need a join table? is the join table my comments table?
On May 11, 8:36 am, Colin Law <clan...@googlemail.com> wrote:
> On 11 May 2010 13:32, David Zhu <dzwestwindso...@gmail.com> wrote:
>
> > Oh ok thanks!
>
> > But just to make sure we are on the same page-
>
> > Page has many comments
> > Comments has many Davids
>
> I believe that if you also say Page has_many davids through comments
> then you can get at all the davids for a post by
> @post.davids
> and hence you can use @posts.davids.count
>
> Colin
>
>
>
>
>
>
>
> > Would
>
> > @davidcount = Post.comments.map {|comment| comment.davids.count}.sum
>
> > find out how many David's are in a certain Post?
>
> > Just to clarify, im not trying to find All of the David's that exsit
> > in the entire database, just the amount of Davids that belongs to the
> > post. But the part i dont understand is how to count up the David's
> > that belongs to that Post, because there are comments in between.
> > (post has many comments, comments has many davids) And i want to find
> > out for a certain post (@post) how many davds belongs to it)
>
> > So would @davidcount = Post.comments.map {|comment|
> > comment.davids.count}.sum work for something like that?
>
> > Thank you
>
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