I'm guessing you don't want to the mode to be changed except by methods of the class. If so, make a "private" writer. 

has mode => (
   reader   => 'mode',
   writer   => '_set_mode',
   isa      => 'Str',
   required => 1,
);

sub creaLog {
   my $self = shift;
   $self->_set_mode('changed');
}

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In reply to Re: Moose: problem with accessor by ikegami
in thread Moose: problem with accessor by saintex

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