thr3ads.net - Rails - RSS Generation Problem [Apr 2005]

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Myles Grant

2005-Apr-26 17:02 UTC

RSS Generation Problem

My controller (app/controllers/comments_controller.rb):

class CommentsController < ApplicationController
  caches_page :index, :list, :show, :rss

[snip...]

  def rss
    @headers["Content-Type"] = "text/xml; charset=utf-8"
    @comments = Comment.find_all nil, "date DESC", 20
  end
end

My view (app/controllers/comments_controller.rb):

xml.rss("version" => "2.0") do
  xml.channel do
    xml.title("What They Said: Recent comments")
    xml.link("http://www.whattheysaid.net/comments/")
    xml.description "Recent comments posted to What They Said"
    xml.language "en-us"
    xml.ttl "40"

    for comment in @comments
      xml.item do
        xml.title(comment.body)
        xml.description(comment.body)
        xml.pubDate(comment.date)
       
xml.link(''http://www.whattheysaid.net/quotations/show/'' +
comment.quotation_id + '''')
      end
    end
  end
end

The error:

Processing CommentsController#rss (for 127.0.0.1 at Tue Apr 26 16:52:55 
GMT 2005)
  Parameters: {"action"=>"rss",
"id"=>"nil",
"controller"=>"comments"}
  Comment Load (0.000389)   SELECT * FROM comments ORDER BY date DESC 
LIMIT 20
Rendering comments/rss (200 OK)
  Comment Columns (0.000374)   SHOW FIELDS FROM comments


ActionView::TemplateError (cannot convert Fixnum into String) on line #1 
of /comments/rss.rxml:
1: xml.rss("version" => "2.0") do
2:   xml.channel do
3:     xml.title("What They Said: Recent comments")
4:     xml.link("http://www.whattheysaid.net/comments/")

    /gems/actionpack-1.8.1/lib/action_view/base.rb:278:in `+''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:278:in
`evaluate_locals''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:274:in `call''
    
/gems/actionpack-1.8.1/lib/action_view/vendor/builder/xmlbase.rb:138:in 
`_nested_structures''
    
/gems/actionpack-1.8.1/lib/action_view/vendor/builder/xmlbase.rb:60:in 
`method_missing''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:274:in
`evaluate_locals''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:273:in `each''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:273:in
`evaluate_locals''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:266:in `call''
    
/gems/actionpack-1.8.1/lib/action_view/vendor/builder/xmlbase.rb:138:in 
`_nested_structures''
    
/gems/actionpack-1.8.1/lib/action_view/vendor/builder/xmlbase.rb:60:in 
`method_missing''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:266:in
`evaluate_locals''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:265:in `call''
    
/gems/actionpack-1.8.1/lib/action_view/vendor/builder/xmlbase.rb:138:in 
`_nested_structures''
    
/gems/actionpack-1.8.1/lib/action_view/vendor/builder/xmlbase.rb:60:in 
`method_missing''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:265:in
`evaluate_locals''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:265:in
`evaluate_locals''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:283:in `rxml_render''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:201:in `send''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:201:in
`render_template''
    /gems/actionpack-1.8.1/lib/action_view/base.rb:181:in `render_file''
    /gems/actionpack-1.8.1/lib/action_controller/base.rb:458:in 
`render_file''
    /gems/actionpack-1.8.1/lib/action_controller/base.rb:440:in 
`render_without_layout''
    /gems/actionpack-1.8.1/lib/action_controller/layout.rb:211:in 
`render_without_benchmark''
    /gems/actionpack-1.8.1/lib/action_controller/benchmarking.rb:23:in 
`render''
    /gems/actionpack-1.8.1/lib/action_controller/benchmarking.rb:23:in 
`measure''
    /gems/actionpack-1.8.1/lib/action_controller/benchmarking.rb:23:in 
`render''
    /gems/actionpack-1.8.1/lib/action_controller/base.rb:709:in 
`perform_action_without_filters''
    /gems/actionpack-1.8.1/lib/action_controller/filters.rb:294:in 
`perform_action_without_benchmark''
    /gems/actionpack-1.8.1/lib/action_controller/benchmarking.rb:37:in 
`perform_action_without_rescue''
    /gems/actionpack-1.8.1/lib/action_controller/benchmarking.rb:37:in 
`measure''
    /gems/actionpack-1.8.1/lib/action_controller/benchmarking.rb:37:in 
`perform_action_without_rescue''
    /gems/actionpack-1.8.1/lib/action_controller/rescue.rb:79:in 
`perform_action''
    /gems/actionpack-1.8.1/lib/action_controller/base.rb:330:in `send''
    /gems/actionpack-1.8.1/lib/action_controller/base.rb:330:in
`process''
    /gems/actionpack-1.8.1/lib/action_controller/base.rb:273:in
`process''
    /gems/rails-0.12.1/lib/dispatcher.rb:32:in `dispatch''
    /var/www/whattheysaid/public/dispatch.fcgi:20
    /var/www/whattheysaid/public/dispatch.fcgi:18:in `each_cgi''
    /usr/lib/ruby/site_ruby/1.8/fcgi.rb:597:in `each''
    /usr/lib/ruby/site_ruby/1.8/fcgi.rb:597:in `each_cgi''
    /var/www/whattheysaid/public/dispatch.fcgi:18

Any ideas?  This is almost identical to the example on the main page of 
http://ap.rubyonrails.com/ (line #1 is exactly identical), so I''m at a 
bit of a loss.

Thanks,
Myles

Simon Willison

2005-Apr-26 17:10 UTC

head link

Re: RSS Generation Problem

On 26 Apr 2005, at 18:02, Myles Grant wrote:> ActionView::TemplateError (cannot convert Fixnum into String) on line 
> #1 of /comments/rss.rxml:
Ruby is strongly typed, which means it won''t let you add an integer to 
a string (for example). You need to do this:

xml.link(''http://www.whattheysaid.net/quotations/show/'' + 
comment.quotation_id.to_s)

The .to_s converts the integer (the quotation_id) to a string, which 
can then be added to the other string without Ruby complaining.

Hope that helps!

Simon Willison
http://simon.incutio.com/

Myles Grant

2005-Apr-26 17:16 UTC

head link

Re: RSS Generation Problem

Simon Willison wrote:
>
> On 26 Apr 2005, at 18:02, Myles Grant wrote:
>
>> ActionView::TemplateError (cannot convert Fixnum into String) on line 
>> #1 of /comments/rss.rxml:
>
>
> Ruby is strongly typed, which means it won''t let you add an
integer to
> a string (for example). You need to do this:
>
> xml.link(''http://www.whattheysaid.net/quotations/show/'' +
> comment.quotation_id.to_s)
>
> The .to_s converts the integer (the quotation_id) to a string, which 
> can then be added to the other string without Ruby complaining.
>
> Hope that helps!
>
> Simon Willison
> http://simon.incutio.com/
>
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
Simon,

Thanks!  I  was stuck looking up on line #1 (xml.rss("version" =>
"2.0")
do), because that''s what I thought the error message indicated.

-Myles

Rails - Apr 2005 - RSS Generation Problem

RSS Generation Problem

Re: RSS Generation Problem

Re: RSS Generation Problem