Rails Ruby on Rails

This may fall under the "why would you want to" category, but the validates_confirmation_of validation does not properly validate decimal (BigDecimal) columns. Example:

create_table :payments do |t|

t.decimal :amount, :precision => 10, :scale => 2

end

class Payment < ActiveRecord::Base

validates_confirmation_of :amount

end

1. Lets make believe this is string form data

script/console

>> p = Payment.new(:amount => "0.25", :amount_confirmation => "0.25")

>> p.save

=> false

>> p.errors.full_messages

=> ["Amount doesn't match confirmation"]

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This appears to be due to the fact that the amount_confirmation value is not being cast to a BigDecimal like the amount value is. Adding this hack to the Payment model fixes the issue

def amount_confirmation

column_for_attribute(:amount).type_cast(@amount_confirmation)

end