With a Moose object I am passing the value of an object attribute to the execute method of a DBI statement handle, i.e. something like: 

  $sth = $dbh->prepare(...);
  $sth->execute($obj->now);

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where $obj is a Moose object. I've been told by my DBAs that the bind parameter is being treated as a string instead of a number which is causing my query to run slowly. I could fix this by writing: 
  $sth->execute(0+$obj->now);

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However, I'm using $obj->now in many places.

Question: How can I declare the 'now' attribute of $obj so that on gets it will ensure that the value returned is a number (or undef). Currently, 'now' is simply defined as: 

has now => ( is => 'rw' );

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In reply to Moose - ensuring a getter returns a number by perl5ever

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