Question

I have:

AMOUNT = { '$ 0.50' => 0.5, '$ 1' => 1, '$ 2' => 2, '$ 5' => 5, '$ 10' => 10 }

Isn’t:

validates :amount, :inclusion => { :in => %w(0.5 1 2 5 10), :message => '%{value} is not a valid amount' }

the same thing as:

validates :amount, :inclusion => { :in => AMOUNT.values, :message => '%{value} is not a valid amount' }

With the former, everything works. With the latter, every time I submit, I get the validation message…

Answer 1

In the first one:

:in => %w(0.5 1 2 5 10)

your :in is an array of Strings. In your second one:

:in => AMOUNT.values

your :in is an array of Floats and Fixnums. Apparently your amount is a String during validation and 10 != '10' is true.

Try changing the values in your AMOUNT to Strings or do the conversion when you build :in:

:in => AMOUNT.values.map(&:to_s)