Show attribute of form object via logger in rails - ruby-on-rails

Question

I want to debug my application and check what values are submitted on the form object in my controller class via logger ? How can it be done? Is there any better practice to debug rails application?

Answer 1

Your rails log (eg log/development.log) should already show everything that the form submitted, in the "Parameters". It will look like this:
Processing MusicServiceAdmin::UsersController#edit (for 127.0.0.1 at 2014-07-31 10:34:16) [GET]
Session ID: 3c0cfbe7ff23f8f718f6626748a4a
Parameters: {"id"=>"35363"}

Answer 2

Params
Each request in Rails is tracked using the console - you should examine the params which come through from there:
Started POST "/admin/login" for 127.0.0.1 at 2014-04-26 16:25:34 +0100
Processing by Admin::Users::SessionsController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"+I1TKfc1YDuil7EI1frrFIoerNg5uonB1CIiujJO0jo=", "user"=>{"email"=>"*********", "password"=>"[FILTERED]", "remember_me"=>"0"}, "commit"=>"Sign In"}
[1m[36mUser Load (482.0ms)[0m [1mSELECT `users`.* FROM `users` WHERE `users`.`email` = 'rpeck#frontlineutilities.co.uk' ORDER BY `users`.`id` ASC LIMIT 1[0m
[1m[35m (435.0ms)[0m BEGIN
[1m[36mSQL (439.0ms)[0m [1mUPDATE `users` SET `current_sign_in_at` = '2014-04-26 15:25:35', `last_sign_in_at` = '2014-04-04 12:08:45', `sign_in_count` = 51, `updated_at` = '2014-04-26 15:25:36' WHERE `users`.`id` = 2[0m
[1m[35m (448.0ms)[0m COMMIT
[1m[36mOption Load (404.0ms)[0m [1mSELECT `options`.* FROM `options` WHERE `options`.`name` = 'site_robots' LIMIT 1[0m
[1m[35mOption Load (357.0ms)[0m SELECT `options`.* FROM `options` WHERE `options`.`name` = 'site_title' LIMIT 1
[1m[36mOption Load (428.0ms)[0m [1mSELECT `options`.* FROM `options` WHERE `options`.`name` = 'site_description' LIMIT 1[0m
Redirected to http://lvh.me:3000/****
Completed 302 Found in 3165ms (ActiveRecord: 2993.2ms)
If you want to "debug", you just have to examine the various params / actions which are rendered in the console. Alternatively, you may also wish to the use the Rails.logger.info method for specific data:
#app/controllers/your_controller.rb
Class YourController < ApplicationController
def index
Rails.logger.info("Test")
end
end