module Ransack::Constants

def escape_wildcards(unescaped)
  case ActiveRecord::Base.connection.adapter_name
  when "Mysql2".freeze
    # Necessary for MySQL
    unescaped.to_s.gsub(/([\\%_])/, '\\\\\\1')
  when "PostgreSQL".freeze
    # Necessary for PostgreSQL
    unescaped.to_s.gsub(/([\\%_.])/, '\\\\\\1')
  else
    unescaped
  end
end