1
我無法用MooseX::Declare
覆蓋角色中已聲明的屬性。使用駝鹿角色時覆蓋默認屬性
use MooseX::Declare;
role Person {
has 'name' => (
is => 'ro',
isa => 'Str',
default => 'John',
);
}
class Me with Person {
has '+name' => (
default => 'Michael',
);
}
這是由執行代碼報告的錯誤:
Could not find an attribute by the name of 'name' to inherit from in Me at /usr/lib/perl5/Moose/Meta/Class.pm line 711
Moose::Meta::Class::_process_inherited_attribute('Moose::Meta::Class=HASH(0x2b20628)', 'name', 'default', 'Michael', 'definition_context', 'HASH(0x114fd38)') called at /usr/lib/perl5/Moose/Meta/Class.pm line 694
Moose::Meta::Class::_process_attribute('Moose::Meta::Class=HASH(0x2b20628)', '+name', 'default', 'Michael', 'definition_context', 'HASH(0x114fd38)') called at /usr/lib/perl5/Moose/Meta/Class.pm line 566
Moose::Meta::Class::add_attribute('Moose::Meta::Class=HASH(0x2b20628)', '+name', 'default', 'Michael', 'definition_context', 'HASH(0x114fd38)') called at /usr/lib/perl5/Moose.pm line 79
Moose::has('Moose::Meta::Class=HASH(0x2b20628)', '+name', 'default', 'Michael') called at /usr/lib/perl5/Moose/Exporter.pm line 370
Moose::has('+name', 'default', 'Michael') called at Test.pm line 12
main::__ANON__() called at /usr/share/perl5/MooseX/Declare/Syntax/MooseSetup.pm line 81
MooseX::Declare::Syntax::MooseSetup::__ANON__('CODE(0x2b0be20)') called at Test.pm line 21
這工作,但它不是基於角色:
class Person {
has 'name' => (
is => 'ro',
isa => 'Str',
default => 'John',
);
}
class Me extends Person {
has '+name' => (
default => 'Michael',
);
}
使用角色時有什麼錯我的代碼?有沒有可能重寫屬性行爲?
請將您自己的答案作爲下面的實際答案發布,而不是編輯您的問題,並接受它。這有助於其他人找到它,並且您的問題不再顯示爲未答覆。 – simbabque 2013-03-27 15:08:07
當定時器不見時,我會做,我不能回答我自己的問題。我認爲發佈已經找到的解決方案會很有幫助,否則人們會試圖幫助解決已經解決的問題。 – mino 2013-03-27 15:17:59
我現在修好了:) – mino 2013-03-28 12:14:58