with_exclusive_scope

The example Ramon gave works within the model itself, i.e.

class Article
def closed
  with_exclusive_scope { find(:all) }
end
end

However, from what I can see, this approach does not work within a controller. You may be wanting to use

Article.with_exclusive_scope { find(:all) }  #=> "SELECT * FROM 'articles'

But it will error out about find(:all) not existing on ArticlesController. To get around this, you must now do

Article.with_exclusive_scope { Article.find(:all) }  #=> "SELECT * FROM 'articles'

In otherwards, find(:all) isn't being executed in the scope of the model, but in the controller in which its called.

Took me a minute or two to find out, so I thought I'd let others know.

The +with_exclusive_scope+ examples no longer work in Rails3 because +with_exclusive_scope+ is now a protected method which can and should not be used in a controller. Use the new +unscoped+ method instead:

Article.unscoped

For mor details and examples have a look at: http://github.com/rails/rails/commit/bd1666ad1de88598ed6f04ceffb8488a77be4385.

=== Code example Article.with_exclusive_scope { find(:all) } #=> "SELECT * FROM 'articles'

from http://ryandaigle.com/articles/2008/11/18/what-s-new-in-edge-rails-default-scoping