#223 named_scope that composes other named_scopes - Ruby on Rails

Type	To find
responsible:me	tickets assigned to you
tagged:"@high"	tickets tagged @high
milestone:next	tickets in the upcoming milestone
state:invalid	tickets with the state invalid
created:"last week"	tickets created last week
sort:number, importance, updated	tickets sorted by #, importance or updated
Combine keywords for powerful searching.
Use advanced searching »

This project is archived and is in readonly mode.

#223 ✓wontfix

named_scope that composes other named_scopes

Reported by Henrik Nyh | May 19th, 2008 @ 05:32 PM

It would be very useful if you could do e.g.

named_scope :published, ...
named_scope :japanese, ...
named_scope :popular, :conditions => ..., :compose => :published
named_scope :big_in_japan, :compose => [:japanese, :popular]

so that

Post.big_in_japan

will incorporate the "published", "japanese" and "popular" conditions etc in a DRY way. I love named_scope, but I sometimes end up with chains that are too long for comfort.

Comments and changes to this ticket

You flagged this item as spam.
Ryan Bates May 20th, 2008 @ 06:15 PM
That's a pretty cool idea. It's similar to ticket #57.
I'm wondering if the :include option might be a good spot for this. Currently it's just used to manage associations, but what if you could include named scopes? This has the side benefit that you can use it in any "find" call as well as the named scope. It also would allow you to include named scopes through associations. For example:
```
class Category
  has_many :products
  named_scope :visible, :conditions => { :hidden => false }
end

class Product
  belongs_to :category
  named_scope :released, :conditions => "products.released_at IS NOT NULL"
  named_scope :visible, :include => [:released, {:category => :visible}]
end
```
Okay, probably just a crazy idea that would be ridiculously complicated to implement. But a fun thought none-the-less.
josh July 17th, 2008 @ 01:50 AM
- Assigned user set to “Pratik”
- Tag set to “activerecord, enhancement, named_scope”
Pratik July 18th, 2008 @ 03:26 AM
- State changed from “new” to “wontfix”
Closing until we have a patch. Also looks like a duplicate of #57 which has a patch.
Thanks.