From: Greg Hauptmann <greg.hauptmann.ruby@...>
Date: 2009-03-05T16:13:54+09:00
Subject: with YAML can I retrieve the class type back???

--001636ed63f46c913e046459eef8
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

Hi,
If I wanted to persist different Ruby types (e.g. float, BigDecimal,
integer, string) to a database based table (e.g. column names KEY and
VALUE), if I use the "to_yaml" method to serialize their values and store
them as strings, what's the easiest way to retrieve them back to a Ruby
variable such that they are of the original type (i.e. not a YAML type).

E.g. Want to be able to do things such as (assume I have a model called
Config):

Config.create!(:key => "interest_rate", :value =>
BigDecimal('12.12').to_yaml)
Config.create!(:key => "age", :value => 12.to_yaml)

and then later

ir = Config.find_by_key('interest_rate")   # and the variable should be of
type BigDecimal
ir = Config.find_by_key('age")   # and the variable should be of type
Integer
etc




-- 
Greg
http://blog.gregnet.org/

--001636ed63f46c913e046459eef8--