**Simple Searchable Concern** To use, simply drop this in `app/models/concerns`, include it in the model you want to search (`include Searchable`) and declare which fields are searchable with `searchable_on`. The query currently performed is a simple conjoined `ilike`, but it could be easily extended to more robust queries.

searchable.rb

module Searchable
  extend ActiveSupport::Concern
  
  included do
    cattr_accessor :_searchable_fields
  end
  
  module ClassMethods
    def searchable_on(*fields)
      self._searchable_fields = fields
    end
    
    def search(term)
      if term && _searchable_fields
        query = _searchable_fields.collect { |field| "#{field} ilike :term" }.join(" or ")
        where(query, term: "%#{term}%")
      else
        scoped
      end
    end
  end
end