Mojo::Base - Minimal Base Class For Mojo Projects
package Car;
use base 'Mojo::Base';
__PACKAGE__->attr('driver');
__PACKAGE__->attr('doors', default => 2);
__PACKAGE__->attr([qw/passengers seats/],
chained => 0,
default => sub { 2 }
);
__PACKAGE__->attr('trailer', weak => 1);
package main;
use Car;
my $bmw = Car->new;
print $bmw->doors;
print $bmw->passengers(5)->doors;
my $mercedes = Car->new(driver => 'Sebastian');
print $mercedes->passengers(7)->passengers;
$mercedes->trailer(Trailer->new);
Mojo::Base is a minimalistic base class for Mojo projects. For debugging you can set the MOJO_BASE_DEBUG environment variable.
new my $instance = BaseSubClass->new;
my $instance = BaseSubClass->new(name => 'value');
my $instance = BaseSubClass->new({name => 'value'});
This class provides a standard object constructor. You can pass arguments to it either as a hash or as a hashref, and they will be set in the object's internal hash reference.
attr __PACKAGE__->attr('name');
__PACKAGE__->attr([qw/name1 name2 name3/]);
__PACKAGE__->attr('name', chained => 0, default => 'foo');
__PACKAGE__->attr(name => (chained => 0, default => 'foo'));
__PACKAGE__->attr('name', {chained => 0, default => 'foo'});
__PACKAGE__->attr([qw/name1 name2 name3/] => {
chained => 0,
default => 'foo'}
);
The attr method generates one or more accessors, depending on the number of arguments, which work as both getters and setters. You can modify the accessor behavior by passing arguments to attr either as a hash or a hashref.
Currently there are three options supported.
chained: Whenever you call an attribute with arguments the instance
is returned instead of the value. (This will be activated by
default and can be deactivated by setting chained to false)
default: Default value for the attribute, can be a coderef or constant
value. (Not a normal reference!)
Note that the default value is "lazy", which means it only
gets assigned to the instance when the attribute has been
called.
weak: Weakens the attribute value, use to avoid memory leaks with
circular references.
