Q:

How to abandon/rollback the modifications done into a model entity?

I changed some value of an entity from the db, but now I want to discard all the changes. How can I do this?
I tried following:
    u = User.find(1)
    u.nick = "dddd"

    u.abandon?  #i didn't want rollback the chage of the u 

A:

try 
u.reload

It'll reload the entity from the database.

