Rails - Apr 2010 - nested resources and controllers: I think I'm down the wrong path

Hi,

I''m new to nested resources. I''m surprised to find that to
make my
code work I need to retrieve the parent model in my RESTful
controllers for my dependencies.

So, for example, let''s say A has_one B. In controller B I seem to need
to refer to parent A, for example:

@b = A.find(params[:a_id]).b

But this doesn''t seem right and this change has only seemed to become
necessary as I''ve lately been using nested routes and nested form_for
stuff.

Can anyone confirm that using nested routes should not, in fact,
require wholesale changes like the one above to dependency
controllers?

Thanks,

Grar

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Grary Stimon wrote:
> Hi,
> 
> I''m new to nested resources. I''m surprised to find that
to make my
> code work I need to retrieve the parent model in my RESTful
> controllers for my dependencies.
> 
> So, for example, let''s say A has_one B. In controller B I seem to
need
> to refer to parent A, for example:
> 
> @b = A.find(params[:a_id]).b
> 
> But this doesn''t seem right 
No, it doesn''t.  You should always be able to do B.find(params[:b_id])
.
What happens when you try?

Best,
--
Marnen Laibow-Koser
http://www.marnen.org
marnen-sbuyVjPbboAdnm+yROfE0A@public.gmane.org
-- 
Posted via http://www.ruby-forum.com/.

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Marnen,

Here is the expression of a representative model association in my
project:

Parent ... has_one :dependent
Dependent ... belongs_to :parent

Here is my complementing route:

map.resources :parents, :has_one => [:dependent, :dependent_2, ...

Here is a change I''d lately made to a _form.html.erb partial in views/
children to make things (kind of) work:

<% form_for([:parent, @child], :url => { :action=>:create }) do |f|
%>

Man, I''m vexed!

I feel like I need to understand how form_for must be adapted for use
with nested resources.

Grar


On Apr 26, 10:35 am, Marnen Laibow-Koser
<li...-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:
> Grary Stimon wrote:
> > Hi,
>
> > I''m new to nested resources. I''m surprised to find
that to make my
> > code work I need to retrieve the parent model in my RESTful
> > controllers for my dependencies.
>
> > So, for example, let''s say A has_one B. In controller B I
seem to need
> > to refer to parent A, for example:
>
> > @b = A.find(params[:a_id]).b
>
> > But this doesn''t seem right
>
> No, it doesn''t.  You should always be able to do
B.find(params[:b_id]) .
> What happens when you try?
>
> Best,
> --
> Marnen Laibow-Koserhttp://www.marnen.org
> mar...-sbuyVjPbboAdnm+yROfE0A@public.gmane.org
> --
> Posted viahttp://www.ruby-forum.com/.
>
> --
> You received this message because you are subscribed to the Google Groups
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> To post to this group, send email to
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[Please quote when replying.]

Grary Stimon wrote:
> Marnen,
> 
> Here is the expression of a representative model association in my
> project:
> 
> Parent ... has_one :dependent
> Dependent ... belongs_to :parent
> 
> Here is my complementing route:
> 
> map.resources :parents, :has_one => [:dependent, :dependent_2, ...
Why the :dependent_2 ?  That doesn''t match your associations above.

And do you really want has_one?  It has legitimate uses, but n most 
cases, you should combine the two models instead of using has_one .
> 
> Here is a change I''d lately made to a _form.html.erb partial in
views/
> children to make things (kind of) work:
> 
> <% form_for([:parent, @child], :url => { :action=>:create }) do
|f| %>
> 
> Man, I''m vexed!
Perhaps if you were to answer the question I asked, I could help you 
better.

Perhaps if you could say what you had already tried, and how it failed, 
we could help you better.

But with the information you are providing, and your failure to answer 
questions intended to gather additional information about the problem, 
it is nearly impossible to help.
> 
> I feel like I need to understand how form_for must be adapted for use
> with nested resources.
> 
> Grar
Best,
--
Marnen Laibow-Koser
http://www.marnen.org
marnen-sbuyVjPbboAdnm+yROfE0A@public.gmane.org
-- 
Posted via http://www.ruby-forum.com/.

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I can''t recreate the problem, somehow, let''s consider the
question
dead until I can.

Thanks,

Grar

On Apr 26, 11:06 am, Marnen Laibow-Koser
<li...-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:
> [Please quote when replying.]
>
> Grary Stimon wrote:
> > Marnen,
>
> > Here is the expression of a representative model association in my
> > project:
>
> > Parent ... has_one :dependent
> > Dependent ... belongs_to :parent
>
> > Here is my complementing route:
>
> > map.resources :parents, :has_one => [:dependent, :dependent_2, ...
>
> Why the :dependent_2 ?  That doesn''t match your associations
above.
>
> And do you really want has_one?  It has legitimate uses, but n most
> cases, you should combine the two models instead of using has_one .
>
>
>
> > Here is a change I''d lately made to a _form.html.erb partial
in views/
> > children to make things (kind of) work:
>
> > <% form_for([:parent, @child], :url => { :action=>:create })
do |f| %>
>
> > Man, I''m vexed!
>
> Perhaps if you were to answer the question I asked, I could help you
> better.
>
> Perhaps if you could say what you had already tried, and how it failed,
> we could help you better.
>
> But with the information you are providing, and your failure to answer
> questions intended to gather additional information about the problem,
> it is nearly impossible to help.
>
>
>
> > I feel like I need to understand how form_for must be adapted for use
> > with nested resources.
>
> > Grar
>
> Best,
> --
> Marnen Laibow-Koserhttp://www.marnen.org
> mar...-sbuyVjPbboAdnm+yROfE0A@public.gmane.org
> --
> Posted viahttp://www.ruby-forum.com/.
>
> --
> You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
> To post to this group, send email to
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