Comments on: More Named Scope Awesomeness

By: Mobile WebSite

Mobile WebSite — Wed, 07 Jul 2010 06:23:21 +0000

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By: Tomasz Mazur

Tomasz Mazur — Mon, 08 Jun 2009 17:11:35 +0000

I’ve wrote something similiar,
http://github.com/tomaszmazur/trixy_scopes/tree

By: Pathfinder Development » A Look Back At Past Posts

Pathfinder Development » A Look Back At Past Posts — Tue, 16 Dec 2008 17:26:22 +0000

[...] project that included integrated design drafts, named-scope based reporting, and aggressive markup in the helpers had it’s post-mortem this week. It was interesting to see how [...]

By: Pathfinder Development » I’m Cranky Because I’m Not Getting Enough REST

Fri, 22 Aug 2008 21:02:44 +0000

[...] that triggers an overlay, you can sort the columns. The advanced search is the flexible one I mention here, so it’s got several Ajax calls associated with it as [...]

By: Fredrik W

Fredrik W — Wed, 16 Jul 2008 08:43:20 +0000

Here’s some code that I came up with a week ago.

http://pastie.org/231954

Is basically takes an array of different scopes you wish to apply and injects them into the the model. I haven’t thought of AND/OR joins yet though.

By: jtoy

jtoy — Fri, 04 Jul 2008 11:59:25 +0000

There seems to be a bug in the code, if I do a :
Model.some_scoped_proxy.search_by(@searches)
search_by will ignore the previous named_scopes.
but if I do
Model.search_by(@searches).some_scoped_proxy
that will generate the proper sql.

Also I had a seperate question, I tried making my own simple example based off your code. I want a order named_proxy on all AR models, but my code doesn’t work because when it calls column_names the lambda thinks its calling it on ActiveRecord::Base instead of the subclassed model. Why does this not work?

class ActiveRecord::Base
named_scope rder, lambda {|column|
if column_names.include? column
{:order => column}
end
}

end

Also one other thing I noticed about scopes is that they dont override previous scopes, so for example Car.order(‘a’).order(‘b’)
I would think that following the “ruby way” of least suprise, the order would on b, but its actually on a

By: Noel Rappin

Noel Rappin — Thu, 03 Jul 2008 22:26:42 +0000

James and Ben — in the actual version of this, the user is limited to a specific subset (I think delete_all is excluded because it’ll cause an error when composed with other scopes), plus there are some additional scopes tacked on to all the searches to limit users to objects that they have access to see. Although I probably could do a tighter job of limiting the searches.

Tammer — thanks for the kind words, we use a lot of thoughtbot tools on a daily basis here..

By: Nick Kallen

Nick Kallen — Tue, 01 Jul 2008 05:42:32 +0000

Love the articles. Inject is great:

all_criteria.inject(scoped({})) do |scope, criterion|
scope.scoped(search_by_criteria(*criterion).proxy_options)
end

By: Ben Nolan

Ben Nolan — Sun, 29 Jun 2008 00:48:52 +0000

I’m guessing you check that the operators are from a valid subset – so that people can’t ask for the delete_all operator?

By: David

David — Sat, 28 Jun 2008 13:26:09 +0000

Nice, I’m just learning named_scope and used it in a project this week. I figured there was a way to generate anonymous scopes on the fly to simplify all my crazy conditional logic. This example really helps alot. cheers mate.