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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