>> u = User.new(:email => "foo@bar.com")
=> #<User @id=nil @password=nil @salt=nil @first_name=nil @last_name=nil @email="foo@bar.com" @birthday=nil>
>> u.inspect
=> "#<User @id=nil @password=nil @salt=nil @first_name=nil @last_name=nil @email=\"foo@bar.com\" @birthday=nil>"
>> u.valid?
=> true
>> u.saved?
=> false
>> u
=> #<User @id=nil @password=nil @salt=nil @first_name=nil @last_name=nil @email="foo@bar.com" @birthday=nil>
>> u.save
 ~ (0.116362) SET backslash_quote = off
 ~ (0.115933) SET standard_conforming_strings = on
 ~ (0.115910) SET client_min_messages = warning
 ~ (0.121758) INSERT INTO "users" DEFAULT VALUES RETURNING "id"
=> true
>> u
=> #<User @id=4 @password=nil @salt=nil @first_name=nil @last_name=nil @email="foo@bar.com" @birthday=nil>
>> User.get(4)
 ~ (0.118055) SELECT "id", "password", "salt", "first_name", "last_name", "email", "birthday" FROM "users" WHERE "id" = 4 LIMIT 1
=> #<User @id=4 @password=nil @salt=nil @first_name=nil @last_name=nil @email=nil @birthday=nil>
>>