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

  • <%= link_to "Posts", posts_url %>
  • <% if superuser? %>

  • Administration

  • <% end %>

    <% unless logged_in? %>

  • Register Now!

  • <% else %>
  • <%= link_to “Logout”, logout_users_url %>

  • <% 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.

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:

  • Administration

  • 9: <% end %>

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

    RAILS_ROOT: /home/tybalt/fs/config/…
    Application Trace http://localhost:3000/# | Framework
    Tracehttp://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:inload’
    /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:incompile_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:inrender_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:inrender_partial’
    #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:26:in
    benchmark' /usr/lib/ruby/1.8/benchmark.rb:293:inmeasure’
    /usr/lib/ruby/1.8/benchmark.rb:307:in realtime' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:26:inbenchmark’
    #{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:inrender’
    #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:328:in
    send' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:328:incompile_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:inrender_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:inrender’
    /usr/lib/ruby/1.8/benchmark.rb:293:in measure' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:50:inrender’
    #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:1150:in
    send' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:1150:inperform_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:incall_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:incall_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:incall’
    #{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:inperform_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:inmeasure’
    #{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:inperform_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:incache’
    #{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:insend’
    #{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:inprocess_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:inprocess’
    #{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:inprocess’
    /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:inprocess’
    /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:ineach’
    /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:inrun’
    /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:innew’
    /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:ininitialize’
    /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:inrun’
    /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:ineach’
    /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:inrun’
    /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:insend’
    #{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:inrender_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:inrender’
    #{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:inbenchmark’
    /usr/lib/ruby/1.8/benchmark.rb:293:in measure' /usr/lib/ruby/1.8/benchmark.rb:307:inrealtime’
    #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:26:in
    benchmark' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/partials.rb:58:inrender_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:incompile_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:inrender_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:inrender’
    /usr/lib/ruby/1.8/benchmark.rb:293:in measure' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:50:inrender’
    #{RAILS_ROOT}/app/controllers/index_controller.rb:7:in index' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:1150:insend’
    #{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:incall_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:incall’
    #{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:incall_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:incall_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:inperform_action_without_rescue’
    /usr/lib/ruby/1.8/benchmark.rb:293:in measure' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:66:inperform_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:inperform_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:inperform_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:inprocess_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:inprocess’
    #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:326:in
    process' #{RAILS_ROOT}/vendor/rails/railties/lib/dispatcher.rb:39:indispatch’
    /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:insynchronize’
    /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:inprocess_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:inprocess_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:ininitialize’
    /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:inrun’
    /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:innew’
    /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:inrun’
    /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:inrun’
    /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:inrun’
    /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
    [email protected]

    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.


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