jonatw/shortUrl — comment on commit 7318bfe6aaa5a5cf688379756ad7cdaa1002e376
File: db/migrate/20111227194032_create_url_data.rb line 3
By marsz:

should use under score format as column name
the following are examples
column & variable name: product_name, product_type
class name: ProductCat
constant variable: PRODUCT_TYPES