The subset_conditions plugin creates an additional *_conditions method for every subset created, which returns the filter conditions the subset uses. This can be useful if you want to use the conditions for a separate filter or combine them with OR.
Usage:
# Add subset_conditions in the Album class Album.plugin :subset_conditions # This will now create a published_conditions method Album.subset :published, :published => true Album.where(Album.published_conditions).sql # SELECT * FROM albums WHERE (published IS TRUE) Album.exclude(Album.published_conditions).sql # SELECT * FROM albums WHERE (published IS NOT TRUE) Album.where(Sequel.|(Album.published_conditions, :ready=>true)).sql # SELECT * FROM albums WHERE ((published IS TRUE) OR (ready IS TRUE))
# File lib/sequel/plugins/subset_conditions.rb, line 27 def self.apply(mod, &block) mod.instance_exec do @dataset_module_class = Class.new(@dataset_module_class) do include DatasetModuleMethods end end end