Rails NameError

AUG 20 2006

Filed under programming, rails, ruby, and web.

If you’re getting NameError (uninitialized constant UnknownAction) using UnknownAction in the ‘rescue_action_in_public’ method, try
to use the full reference (::ActionController::UnknownAction) instead of ActionController::UnknownAction.

For example :

	
class ApplicationController < ActionController::Base	
<span class="k">class</span> <span class="nc">ApplicationController</span> <span class="o">&lt;</span> <span class="no">ActionController</span><span class="o">::</span><span class="no">Base</span>
attr_accessor :auth_err
#——————————————————————
# rescue_action_in_public()
def rescue_action_in_public(exception)
case exception
when ActiveRecord::RecordNotFound
unauthorised_action RecordNotFoundError
when ::ActionController::UnknownAction
unauthorised_action PageNotFoundError
else
log_error(exception)
redirect_to('/500.html')
end
end
#——————————————————————

  # unauthorised_action()

  def unauthorised_action(details=nil)

    # If one unauthorised_action has already occurred, don't need to log the rest

    return false if self.auth_err
# Log the unauthorised_action
user = "Unknown user"
user = "User '"  @session[:user].login  "'" if @session[:user]
msg = user  " denied access to '"  controller_name  "/"  action_name + "'"
msg = " ("  details + ")" if details
logger.error(msg)
self.auth_err = true
redirect_to('/404.html') and return false
rescue
self.auth_err = true
return false
end
end