Ok, got this working, got some stuff ported. This post is just for
others' benefit.
In AR, named_scope can take a lambda{} which allows you to pass args
or do delayed eval:
class Account < ActiveRecord::Base
named_scope :of_type, lambda { |type_id|
{ :conditions => { :account_type_id => type_id } }
}
named_scope :recent, lambda { { :conditions => ['created_at > ?',
1.week.ago] } }
end
And then:
Account.of_type(ADMIN)
Account.of_type(USER).recent
See also:
http://ryandaigle.com/articles/2008/3/24/what-s-new-in-edge-rails-has-finder-functionality
http://apidock.com/rails/ActiveRecord/NamedScope/ClassMethods/named_scope
In Sequel this is possible as well. You can't use the subset()
shortcut though, you have to use def_dataset_method.
To pass args, simply make sure you tell def_dataset_method that your
do..end block needs an |arg|
class Account < Sequel::Model
def_dataset_method(:of_type) do |type_id|
filter(:account_type_id => type_id)
end
def_dataset_method(:recent) do
filter(:created_at => 1.week.ago)
end
end
And then:
Account.of_type(ADMIN).all
Account.of_type(USER).recent.all
Remember you need the .all explicitly, unlike ActiveRecord.
-Nate
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