[Zope-CMF] Problems making a links_box

[Tres Seaver]

On Thu, 2002-06-27 at 10:02, Ronald L Roeber wrote:
> I'm attempting to make a links_box modeled after news_box (Zope: 2.5.1, 
> CMF 1.2. 
> 
> Here is the test code:
> 
> ------------------------------------
> <span tal:define="my_links python: here.portal_catalog(meta_type='Link'
>                                                          , sort_on='Date'
>                                                          , 
> sort_order='reverse'
>                                                          , 
> review_state='published')">
> <span tal:repeat="link my_links">
>   <a href="http://www.dummylink.net" class="menu"
>      tal:attributes="href link/remote_url"
>      tal:content="link/title">An Interesting Link</a><br>
> </span>
> </span>
> ---------------------------------
> I get the following error at the end of the traceback:
> 
> Undefined: remote_url not found in 'link/remote_url', at line 6, column 3
> 
> If I omit the tal:attributes or use something like "href link/id" then I 
> don't get the error, but of course the link is incorrect.
> 
> Are not the objects returned from the catalog search the same type as the 
> original (Link)? 

Nope;  they are "brains", which hold the cached metadata for the
catalogued object and provide access to it.

> could someone point me in the right direction? Thanks.

You can either:

  - Add a column, 'remote_url', to the "Schema" tab of your catalog,
    and then reindex everything;  the "brains" will then have that
    attribute.  This option gives better performance, because the
    page doesn't need to "wake up" the Link objects in order to render.

  - Use the "brain" to get to the underlying object, using its
    'getObject' method;  this will run slower, because 'getObject'
    "wakes up" the underlying object.

Tres.
-- 
===============================================================
Tres Seaver                                tseaver@zope.com
Zope Corporation      "Zope Dealers"       http://www.zope.com