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The Exception Logger (forgive the horrible name) logs your Rails exceptions in the database and provides a funky web interface to manage them.
First you need to generate the migration:
./script/generate exception_migration
Next, you'll need to include the ExceptionLoggable module into ApplicationController. Once that's done you might want to modify key methods to customize the logging:
render_404(exception) - Shows the 404 template.
render_500(exception) - Shows the 500 template.
log_exception(exception) - Logs the actual exception in the database.
rescue_action_in_public(exception) - Does not log these exceptions: ActiveRecord::RecordNotFound, ActionController::UnknownController, ActionController::UnknownAction
After that, visit /logged_exceptions in your application to manage the exceptions.
It's understandable that you may want to require authentication. Add this to your config/environments/production.rb:
# config/environments/production.rb
config.after_initialize do
require_dependency 'application'
LoggedExceptionsController.class_eval do
# set the same session key as the app
session :session_key => '_beast_session_id'
# include any custom auth modules you need
include AuthenticationSystem
before_filter :login_required
# optional, sets the application name for the rss feeds
self.application_name = "Beast"
# only allow admins
# this obviously depends on how your auth system works
def authorized?
# assume app's login required doesn't use http basic
def login_required_with_basic
respond_to do |accepts|
# alias_method_chain will alias the app's login_required to login_required_without_basic
accepts.html { login_required_without_basic }
# access_denied_with_basic_auth is defined in LoggedExceptionsController
# get_auth_data returns back the user/password pair
accepts.rss do
access_denied_with_basic_auth unless self.current_user = User.authenticate(*get_auth_data)
alias_method_chain :login_required, :basic
The exact code of course depends on the specific needs of your application.
You can use ActionController::Base.filter_parameter_logging in the LoggedExceptionsController.
In the code given above, do something like
LoggedExceptionsController.class_eval do
filter_parameter_logging :password
When viewing a logged exception, parameters whose name has "password" as a substring
will show their values as "[FILTERED]". There is a link to toggle this filtering, in
case you really must have a look.
Note that GET parameters will still be shown unfiltered within the logged URL.
Jamis Buck - original exception_notification plugin
Rick Olson - model/controller code
Josh Goebel - design
Chris Wanstrath - use will_paginate
Henrik Nyh (DanceJam) - log exceptions in dev, linkable exceptions, parameter filtering etc