3

鉴于以下情况：

  • 哞2.001001;
  • 面包::板 0.34;
  • 一个Bread::Board容器
  • Foo具有属性str和around修饰符的基类forstr
  • 子类Bar扩展Foo

问题：

  • [GOOD] 从 plain 实例化对象时Bar，Foo::str执行修饰符；
  • [BAD] 从容器服务为 实例化对象时Bar，Foo::str不执行修饰符；
  • 在 [BAD] 发生后 [WORSE]，从普通实例化Bar也不再有效；

代码示例：

#!/usr/qlc/apps/common/perl_5.18.2/bin/perl -w

package Foo;

use Moo;

has str => ( is => 'rw', default => '' );

sub BUILD {
    my ($self, $args) = @_;

    $self->str($self->str);
}

around str => sub {
    my ($orig, $self, $val) = @_;

    return $self->$orig unless defined $val;

    $self->$orig('prefix_'.$val);
};
# end of Foo



package Bar;

use Moo;

extends 'Foo';
# end of Bar



package main;

use 5.010;
use strictures 2;

use Bread::Board;

my $c = container 'MyApp' => as {
    service 'foo' => ( class => 'Foo', parameters => { str => { optional => 1 } } );
    service 'bar' => ( class => 'Bar', parameters => { str => { optional => 1 } } );
};


my $foo_plain = Foo->new({ str => 'foo_plain' });
say "foo_plain = ".$foo_plain->str;

my $foo_bb = $c->resolve( service => 'foo', parameters => { str => 'foo_bb' } );
say "foo_bb = ".$foo_bb->str;

$foo_bb->str('foo_bb_setter');
say "foo_bb_setter = ".$foo_bb->str;

my $foo_plain_after_bb = Foo->new({ str => 'foo_plain_after_bb' });
say "foo_plain_after_bb = ".$foo_plain_after_bb->str;


my $bar_plain = Bar->new({ str => 'bar_plain' });
say "bar_plain = ".$bar_plain->str;

my $bar_bb = $c->resolve( service => 'bar', parameters => { str => 'bar_bb' } );
say "bar_bb = ".$bar_bb->str;

$bar_bb->str('bar_bb_setter');
say "bar_bb_setter = ".$bar_bb->str;

my $bar_plain_after_bb = Bar->new({ str => 'bar_plain_after_bb' });
say "bar_plain_after_bb = ".$bar_plain_after_bb->str;


die;

输出：

foo_plain = prefix_foo_plain
foo_bb = prefix_foo_bb
foo_bb_setter = prefix_foo_bb_setter
foo_plain_after_bb = prefix_foo_plain_after_bb
bar_plain = prefix_bar_plain
bar_bb = bar_bb
bar_bb_setter = bar_bb_setter
bar_plain_after_bb = bar_plain_after_bb

请注意输出bar_bb，bar_bb_setter并且bar_plain_after_bb不包含prefix_字符串。

为什么？

4

1 回答 1

0

这是 Bread::Board 中的错误。

在此提交中修复。

谢谢@Yanick。

于 2017-08-07T12:29:02.670 回答