A really evil trick to get at the wrapped AR model in a class method

evil.rb

def initialize(base_or_relation, opts = {})
  @relation = base_or_relation.scoped
  @base = @relation.klass
  @search_key = opts[:search_key] ? opts[:search_key].to_s : 'search'
  @join_dependency = build_join_dependency
  @search_attributes = {}
  @errors = ActiveModel::Errors.new(self)

  singleton_class.instance_eval "def base; #{@base} end"
end

# We need the base at the singleton_class level to play nice with i18n.
# If anyone's got a less evil solution than this, I'm all ears.
def class
  singleton_class
end

90 days is enough to think about what you've done and how you can do it better. No one deserves a permanent condemnation.