thr3ads.net - Rails - Strange NoMethodError exception with EDGE Rails [Mar 2007]

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András Tarsoly

2007-Mar-06 10:52 UTC

Strange NoMethodError exception with EDGE Rails

Hi guys,

I''ve encountered a strange exception which I can just not understand
why is
it happening (tried to trace it back to the rails source, but I''m not
an
expert, so it proved no results).

The situation is the following:

I have a simple module ported from acts_as_authenticated, modified here and
there. I have 2 methods, namely logged_in? and superuser? defined as below:

# module AuthenticatedSystem
module AuthenticatedSystem

  protected

    # Preloads @current_user with the user model if they''re logged in.
    def logged_in?
     current_user != :false
    end

   # Return true if current_user is root (superuser)
   def superuser?
    return false unless logged_in?
     current_user.roles.detect { |role| role.rights.detect { |right|
right.controller == "*" && right.action == "*"}}
   end

...

end


The problem occurs in the views: I can use logged_in? just fine everywhere
in the views, yet when using superuser? it throws a NoMethodError exception.

A sample view:

# _navigation.erb

<ul id="fsNav">
  <li><%= link_to "Posts", posts_url %></li>

  <% if superuser? %>
    <li><a href="#"
onclick="toggleAdminMode();">Administration</a></li>
  <% end %>

  <% unless logged_in? %>
    <li><a href="#">Register Now!</a></li>
  <% else %>
    <li><%= link_to "Logout", logout_users_url
%></li>
  <% end %>
</ul>



What I can''t understand is why logged_in? working and why superuser? is
not,
when they defined by the same means and at the same place.

Any advice would be welcome where should I look for solving this as I''m
totally clueless already and just can''t read rails source well enough
to
debug it myself.

Thanks in advance,
András



--

And the exception and it''s full trace.
NoMethodError in Index#index

Showing *app/views/shared/_navigation.erb* where line *#7* raised:

undefined method `superuser?'' for
#<#<Class:0x7f061a60>:0x7f061a38>

 Extracted source (around line *#7*):

7:   <% if superuser? %>
8:     <li><a href="#"
onclick="toggleAdminMode();">Administration</a></li>
9:   <% end %>

 Trace of template inclusion: /app/views/layouts/index.erb

RAILS_ROOT: /home/tybalt/fs/config/..
Application Trace <http://localhost:3000/#> | Framework
Trace<http://localhost:3000/#>| Full
Trace <http://localhost:3000/#>

#{RAILS_ROOT}/app/views/shared/_navigation.erb:7:in
`_run_erb_47app47views47shared47_navigation46erb''
#{RAILS_ROOT}/app/views/layouts/index.erb:12:in
`_run_erb_47app47views47layouts47index46erb''
#{RAILS_ROOT}/app/controllers/index_controller.rb:7:in `index''
/usr/bin/mongrel_rails:16:in `load''
/usr/bin/mongrel_rails:16

#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:328:in
`send''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:328:in
`compile_and_render_template''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:303:in
`render_template''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:263:in
`render_file''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:278:in
`render''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/partials.rb:59:in
`render_partial''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:26:in
`benchmark''
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure''
/usr/lib/ruby/1.8/benchmark.rb:307:in `realtime''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:26:in
`benchmark''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/partials.rb:58:in
`render_partial''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:289:in
`render''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:328:in
`send''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:328:in
`compile_and_render_template''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:303:in
`render_template''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:263:in
`render_file''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/layout.rb:256:in
`render_without_benchmark''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:50:in
`render''
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:50:in
`render''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:1150:in
`send''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:1150:in
`perform_action_without_filters''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:632:in
`call_filter''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:638:in
`call_filter''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:438:in
`call''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:637:in
`call_filter''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:638:in
`call_filter''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:438:in
`call''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:637:in
`call_filter''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:619:in
`perform_action_without_benchmark''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:66:in
`perform_action_without_rescue''
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:66:in
`perform_action_without_rescue''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/rescue.rb:125:in
`perform_action_without_caching''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/caching.rb:625:in
`perform_action''
#{RAILS_ROOT}/vendor/rails/activerecord/lib/active_record/query_cache.rb:99:in
`cache''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/caching.rb:624:in
`perform_action''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:473:in
`send''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:473:in
`process_without_filters''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:624:in
`process_without_session_management_support''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/session_management.rb:122:in
`process''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:326:in
`process''
#{RAILS_ROOT}/vendor/rails/railties/lib/dispatcher.rb:39:in `dispatch''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:78:in
`process''
/usr/lib/ruby/1.8/thread.rb:135:in `synchronize''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:76:in
`process''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:618:in
`process_client''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:617:in `each''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:617:in
`process_client''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in `run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in
`initialize''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in `new''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in `run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:in
`initialize''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:in `new''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:in `run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:271:in
`run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:270:in
`each''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:270:in
`run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:127:in
`run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/command.rb:211:in
`run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:243

#{RAILS_ROOT}/app/views/shared/_navigation.erb:7:in
`_run_erb_47app47views47shared47_navigation46erb''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:328:in
`send''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:328:in
`compile_and_render_template''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:303:in
`render_template''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:263:in
`render_file''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:278:in
`render''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/partials.rb:59:in
`render_partial''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:26:in
`benchmark''
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure''
/usr/lib/ruby/1.8/benchmark.rb:307:in `realtime''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:26:in
`benchmark''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/partials.rb:58:in
`render_partial''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:289:in
`render''
#{RAILS_ROOT}/app/views/layouts/index.erb:12:in
`_run_erb_47app47views47layouts47index46erb''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:328:in
`send''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:328:in
`compile_and_render_template''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:303:in
`render_template''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:263:in
`render_file''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/layout.rb:256:in
`render_without_benchmark''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:50:in
`render''
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:50:in
`render''
#{RAILS_ROOT}/app/controllers/index_controller.rb:7:in `index''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:1150:in
`send''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:1150:in
`perform_action_without_filters''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:632:in
`call_filter''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:638:in
`call_filter''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:438:in
`call''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:637:in
`call_filter''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:638:in
`call_filter''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:438:in
`call''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:637:in
`call_filter''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:619:in
`perform_action_without_benchmark''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:66:in
`perform_action_without_rescue''
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:66:in
`perform_action_without_rescue''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/rescue.rb:125:in
`perform_action_without_caching''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/caching.rb:625:in
`perform_action''
#{RAILS_ROOT}/vendor/rails/activerecord/lib/active_record/query_cache.rb:99:in
`cache''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/caching.rb:624:in
`perform_action''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:473:in
`send''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:473:in
`process_without_filters''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:624:in
`process_without_session_management_support''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/session_management.rb:122:in
`process''
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:326:in
`process''
#{RAILS_ROOT}/vendor/rails/railties/lib/dispatcher.rb:39:in `dispatch''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:78:in
`process''
/usr/lib/ruby/1.8/thread.rb:135:in `synchronize''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:76:in
`process''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:618:in
`process_client''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:617:in `each''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:617:in
`process_client''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in `run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in
`initialize''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in `new''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in `run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:in
`initialize''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:in `new''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:in `run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:271:in
`run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:270:in
`each''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:270:in
`run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:127:in
`run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/command.rb:211:in
`run''
/usr/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:243
/usr/bin/mongrel_rails:16:in `load''
/usr/bin/mongrel_rails:16

Request

*Parameters*:

None

 Show session dump <http://localhost:3000/#>

---
:return_to: /
flash: !map:ActionController::Flash::FlashHash {}


Response

*Headers*:

{"Status"=>"200 OK",
 "cookie"=>[],
 "Cache-Control"=>"no-cache"}




-- 
András Tarsoly
tarsolya-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org

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Jean-François Trân

2007-Mar-06 11:22 UTC

head link

Re: Strange NoMethodError exception with EDGE Rails

Hi András,
> I have a simple module ported from acts_as_authenticated,
> modified here and there. I have 2 methods, namely logged_in?
> and superuser? defined as below:
>
> # module AuthenticatedSystem
> module AuthenticatedSystem
[...]>    # Return true if current_user is root (superuser)
>    def superuser?
>     return false unless logged_in?
>      current_user.roles.detect { |role| role.rights.detect { |right|
> right.controller == "*" && right.action ==
"*"}}
>    end
> ...
> end
[...]> What I can''t understand is why logged_in? working and why
> superuser? is not, when they defined by the same means
> and at the same place.
If you''ve taken the code from AuthenticatedSystem,
you must have this method defined :

def self.included(base)
  base.send :helper_method, :current_user, :logged_in?
end

change it to :

def self.included(base)
  base.send :helper_method, :current_user, :logged_in?, superuser?
end

  -- Jean-François.

-- 
Ruby ( http://www.rubyfrance.org ) on Rails ( http://www.railsfrance.org )

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Rails - Mar 2007 - Strange NoMethodError exception with EDGE Rails

Strange NoMethodError exception with EDGE Rails

Re: Strange NoMethodError exception with EDGE Rails