```ruby
require "active_record"

module PgSearch
  def self.included(base)
    base.send(:extend, ClassMethods)
  end

  module ClassMethods
    def pg_search_scope(name)
      named_scope(name)
    end
  end
end
```

Remove deprecation warning for ActiveRecord 3
user
```ruby
require "active_record"

module PgSearch
  def self.included(base)
    base.send(:extend, ClassMethods)
  end

  module ClassMethods
    def pg_search_scope(name)
      scope_method = if self.respond_to?(:scope) && !protected_methods.include?('scope')
                       :scope
                     else
                       :named_scope
                     end
      send(scope_method, name)
    end
  end
end
```
assistant