Improved show_model script

I’ve fixed some bugs and added model class whitelisting to the excellent show_model script from the thoughtbot guys. For the uninitiated, show_model is a slick little script that will show you a ton of information about the models in your Rails applications. Here’s an example run:

aria:~/near-time/near-time.net-trunk blake$ ./script/show_model ControllerPermission
ControllerPermission < Permission < ActiveRecord::Base
  Class Methods:
    controller_class_for
  Associations:
    has_many Roles
  DB Columns:
    action           (string)
    controller_class (string)
    created_at       (datetime)
    id               (integer)
    model_class      (string)
    tab_title        (string)
    type             (string)
    verb             (string)

My updated version will not ‘hide’ models that are loaded by your environment and avoids some nil object errors I ran into.

This is an invaluable tool, I highly recommend adding it to all your Rails projects!

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