User = Meta.new do
coerces :age, :to => :number
end
    # ==> User
user = User.create!(:name => "yrashk", :age => "26")
    # ==> #<User age: 26, name: "yrashk", uuid: "32a37c12-52c0-400e-ba70-9271da3b5852", version: 9c44...>
user.age
    # ==> 26
user.age.class
    # ==> Fixnum