Update syntax on ruby [closed]

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How do I update in ruby?

My database is: Books width: Id, Title and Date

To create I would do:

@book = Book.create   
@book.id = 1 
@book.Title = "HP: Last One"
@book.Date = "2011-01-01"
@book.save   

Now, if I want to update the Book with Id = 1, what to do?

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If you use Active Record (for example through Rails), provided that you have model Book that derives from ActiveRecord::Base and that book is an instance of it (for example: book = Book.find(1) will find you a book with id of 1), it would be something like: book.update_attributes(:title=>"new title", :date=>new_date); or book.title = "new title"; book.date = new_date; book.save.

No idea about other object-relational mappings, though.