DustyDB::Key - mark an attribute as being part of the primary key

version 0.06

  package MyModel;
  use DustyDB::Object;

  has key name => ( is => 'rw', isa => 'Str' );
  has description => ( is => 'rw', isa => 'Str' );

This is a basic marker role that just notifies DustyDB that the attribute should be used to define the primary key (one of the attributes that uniquely identifies it) for the object.

This may be defined as a reference to a subroutine to be used to translate a non-scalar attribute into a scalar key value. For example, if you want to use a date via DateTime as a key, you could do:

  has key timestamp => (
     is => 'rw',
     isa => 'DateTime',
     stringify => sub { $_->iso8601 },
  );

This is a helper for executing the code reference in the stringify attribute correctly.