Re: Access to has_a data from Template?

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On Thu, Sep 16, 2004 at 01:39:47PM -0400, Jesse Sheidlower wrote:
> On Thu, Sep 16, 2004 at 06:30:16PM +0100, Tony Bowden wrote:
> > On Thu, Sep 16, 2004 at 07:28:52AM -0400, Jesse Sheidlower wrote:
> > > Suppose I'm looking at a "book", each book being a
> > > MyLibrary::Book, and each "book" has_a "format"
> > > (hardcover, paperback, etc.). If I do:
> > >   [% USE book = Class("MyLibrary::Book") %]
> > > I still can't seem to get to at the format data:
> > >   FOREACH format = book.format
> > > bombs out with
> > >   undef error - Can't fetch data as class method at
> > 
> > Well, of course it will. You're asking for the format of ALL books, which
> > makes no sense. You presumably want the format of a particular book,
> > which should be getting passed into the template somehow...
> No, I want to access a "format" object, to call things on it.

Which format object? 

> The FOREACH was just an example, but in reality, I'd want to 
> retrieve_all from format, so I can construct a select list
> (or whatever) from the results.

Then why are you working with the Book class?

Instead of:
> > >   [% USE book = Class("MyLibrary::Book") %]

You should be doing something like:

  [% USE bookformat = Class("MyLibrary::Book::Format") %]
  [% SET formats = bookformat.retrieve_all %]

But really you'd be better off passing this sort of thing into the
template in the first place.

Tony