Well stated, James. This is quite clear and helpful. Thank you very
much.
On Dec 22, 4:15 am, James Garlick <[email protected]> wrote:
> If you have a post and you do post.comments you get back an array, so
> you can't just do post.comments.body, otherwise
> you'd get undefined method 'body' for Array. What you'd do in Ruby is
> iterate through the array using each or some other
> iterator. In DRYML you'd do the same using <repeat>
>
> <repeat:comments>
> inside here the context is a comment, so you can call view on
> fields of a comment, e.g.
> <view:body/>
> </repeat>
>
> On 22 Dec 2008, at 04:00, Ian Wood wrote:
>
>
>
> > Hello all!
>
> > As any of you that have read my previous posts will already know, I am
> > new to Hobo and my skill does not yet match my enthusiasm so please
> > bear with me!
>
> > Whilst I am beginning to understand DRYML, Rapid, and Hobo in general,
> > one problem keeps manifesting itself over and over and despite my best
> > efforts I am no closer to cracking this particular nut. My problem is
> > context, I always seem to come unstuck on context.
>
> > If I need to change tags, or call information from the implicit
> > context I have no problem. If I am working on a view for a "post"
> > model and I need to call a field in that model I get no trouble. But
> > if I need to call information from another model then I hit problems.
> > I understand that I need to change context momentarily from the
> > implicit context, but in practice I cannot make this work.
>
> > Here's an example from my (very simple) Hobo Blog, which I am building
> > as a learning exercise for all things Hobo.
>
> > I have created models and controllers for "posts" and "comments". No
> > prizes for guessing what I want these to do.
> > "post" contains two fields; "title" which is a string, and "body"
> > which is HTML.
> > "comment" contains only one field; "body" which is text.
>
> > I put: belongs_to :post in the comment.rb model
> > I put: has_many :comments, :dependent => :destroy in the post.rb model
> > I put: auto_actions_for :post, [:new, :create] in
> > comments_controller.rb
> > I run my hobo_migration and all is well.
> > Now I want to customize the views a bit, before attempting to tackle
> > user permissions.
> > I already have an Index page that is displaying all of the posts I
> > have made. Initially it just displayed the "title" field of each post
> > as a link that would take me to the full post. It also has a counter
> > underneath telling me the number of comments. I want both the "title"
> > and "body" fields from "post" to display, plus the "body" field from
> > "comments". I will also want to display who made each comment, but as
> > I said I haven't got to user permissions yet! so, I define a custom
> > card tag for "post" in application.dryml. It looks like this:
>
> > <def tag="card" for="Post">
> > <card class="post" param="default" merge>
> > <header: param>
> > <h4 param="heading"><a><name/></a></h4>
> > <section param="content-body">
> > <view:body param="description"/>
> > </section>
> > </header:>
> > <body: param ="content-body">
> > <view:comments/>
> > </body:>
> > </card>
> > </def>
>
> > The first part works great. Each post now displays it's "body" field
> > underneath the "title".
> > <view:comments/> is less successful. It only displays a numbered link
> > to any comments that might have been created for that post, not the
> > contents of the "body" field for "comments". I have tried setting the
> > context for this in loads of different ways, I either get an error, or
> > information other than that contained in "body" in "comments".
>
> > If I do:
>
> > <span class="view model:comment">
> > <view:body/>
> > </span>
>
> > I get a second copy of the "body" field from "post" not from "comment"
>
> > If I do:
>
> > <view:comments.body/>
>
> > I get an undefined method `body' for #<Array:0x3b54214> error.
>
> > I'm pretty sure that I am missing something very obvious here, but
> > this part of DRYML / Rapid is not clicking with me at all. I've read
> > and re-read the DRYML guide and the Rapid tag definitions, but I find
> > it quite hard to use either as Rapid is just a list of tags, and DRYML
> > forgoes using Rapid tags in it's examples. I had an earlier problem to
> > do with setting context, and it seems that all of my problems are
> > traceable back to this. What am I missing?
>
> > Thanks guys,
>
> > Ian
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