If i have a User object say user, i.e

>> user = User.find(1)
=> #<User id: 1, login: "james.warner", email: "james.warner@evontech.com",created_at: "2013-11-18 07:12:45", updated_at: "2014-02-03 10:51:02", designation: "Programmer">

Now if i want to see which class does this user object belongs to , i can write

>> user.class
=> User(id: integer, login: string, email: string, created_at: datetime, updated_at: datetime, designation: string)

It tell us that the user object belongs to the User class having the specified set of attributes.

And to print the contents of this user object we have the following 2 methods :

1) .inspect method

>> puts user.inspect
=> #<User id: 1, login: "james.warner", email: "james.warner@evontech.com",created_at: "2013-11-18 07:12:45", updated_at: "2014-02-03 10:51:02", designation: "Programmer">

2) .to_yaml

>> puts user.to_yaml
--- !ruby/object:User 
attributes: 
  login: james.warner
  updated_at: 2014-02-03 10:51:02
  id: "1"
  designation: Programmer
  email: james.warner@evontech.com
  created_at: 2013-11-18 07:12:45
attributes_cache: {}