tags:

views:

52

answers:

2
Q: 

How to know whether a model is new or not? 

class Post < ActiveRecord::Base
end

post = Post.new

How do I judge whether the 'post' is a new model which is not pulled from the database?

+2  A:  
post.new_record?
Faisal  2010-07-26 08:59:28
+10  A: 

ActiveRecord's new_record? method returns true if the object hasn't been saved yet.

John Topley  2010-07-26 08:59:57

related questions

Best place to get Ruby on Vista up and running as dev environment
How can I encode xml files to xfdl (base64-gzip)?
What is the best way to learn Ruby?
Learning Ruby on Rails any good for Grails?
How to sell Python to a client/boss/person with lots of cash
How do I create a Class using the Singleton Design Pattern in Ruby?
How do I update Ruby Gems from behind a Proxy (ISA-NTLM)
Why Should I Learn Ruby?
How do I create a new Ruby on Rails application using MySQL instead of SQLite?
How do I rake tasks within a ruby script?
Ruby On Rails with Windows Vista - Best Setup?
Mapping values from two array in Ruby
Reverse DNS in Ruby?
Text Editor For Linux (Besides Vi)?
What is good forum software to add to an existing Rails application?
Calling Bash Commands From Ruby
How can I modify .xfdl files? (Update #1)
How do I use (n)curses in Ruby?
Open Source Ruby Projects
How do I fix 'Unprocessed view path found' error with ExceptionNotifier plugin in rails 2.1?
When to use lambda, when to use Proc.new?
Frequent SystemExit in Ruby when making HTTP calls
Implementation of "Remember me" in a Rails application.
.NET Migrations Engine
How do I add existing comments to RDoc in Ruby?