def find!( *args )
      raise_not_found_error_was = Mongoid.raise_not_found_error
      begin
        Mongoid.raise_not_found_error = true
        self.find( *args )
      ensure
        Mongoid.raise_not_found_error = raise_not_found_error_was
      end
    end
def find!( *args )
      raise_not_found_error_was = Mongoid.raise_not_found_error
      begin
        Mongoid.raise_not_found_error = true
        self.find( *args )
      ensure
        Mongoid.raise_not_found_error = raise_not_found_error_was
      end
    end
Finds document by id.
 Raises error if document is not found.