What's the significance of named scope in Rails?

Question

Before going for details.

Question 1:-- What\'s the meaning of scope here (ie named **scope)?**

what\'s the benefits of using named

Answer 1

we get shorter, chainable, and more readable code:

orders = Orders.checks.last_n_days(7)

is much more readable, shorter and not chainable than

orders = Orders.all :conditions => ["updated < ? and pay_type='check'", 7]

In Rails3 the advantage will be even greater, because of arel. For more information I recommend watching the Railscasts:

1. 108 named_scope (some basics in rails 2)
2. 202 Active Record Queries in Rails 3 (some basics in rails 3)
3. 215 Advanced Queries in Rails 3 (some advanced topics in rails 3)