Rails - Apr 2007 - Stumped on RXML Template

Hi all,

I have a bit of a problem and don''t know how to proceed:

I have the following RXML Template that:

---------------------------------------
xml.instruct!
xml.articles do
  for article in @articles
    xml.article do
      xml.id(article.id, :type => ''integer'')
      xml.created_at(article.created_at.xmlschema, :type =>
''datetime'')
      xml.title(article.title)
      xml.author do
        xml.id(author.id, :type => ''integer'')
        xml.first_name(author.first_name)
        xml.last_name(author.last_name)
      end
    end
  end
end
---------------------------------------

Some articles have an author and some do not.  In this case I get an
error complaining about author being null when accessing author.id.

I can''t figure out how to conditionally include the author tag in the
XML only if article.author is not nil.


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Robert Walker wrote:
> xml.instruct!
> xml.articles do
>   for article in @articles
>     xml.article do
>       xml.id(article.id, :type => ''integer'')
>       xml.created_at(article.created_at.xmlschema, :type =>
> ''datetime'')
>       xml.title(article.title)
>       xml.author do
>         xml.id(author.id, :type => ''integer'')
>         xml.first_name(author.first_name)
>         xml.last_name(author.last_name)
>       end
>     end
>   end
> end
> 
> I can''t figure out how to conditionally include the author tag in
the
> XML only if article.author is not nil.
Try

...
       xml.author do
         xml.id(article.author.id, :type => ''integer'')
         xml.first_name(article.author.first_name)
         xml.last_name(article.author.last_name)
       end if article.author
...



b



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