哪些推荐的 Perl 模块可以序列化 Moose 对象? [英] Which recommended Perl modules can serialize Moose objects?

问题描述

我通常使用 Storable 和 nstore，但现在我有一个 模块 具有 CODE 并且显然 Storable 不喜欢那样.

I was usually using Storable with nstore, but now I have a module that has CODE and apparently Storable doesn't like that.

我发现了 YAML(和 YAML::XS，我真的不能开始工作).我还对 MooseX::Storage 进行了一些试验，但没有取得多大成功.

I found YAML (and YAML::XS which I can't really get to work). I also experimented a bit with MooseX::Storage without much success.

还有其他选择吗?你会推荐什么?

Are there other alternatives? What would you recommend?

推荐答案

您可以使用 Data::Dumper 将 $Data::Dumper::Deparse 设置为真值后，但这仅用于调试目的，而不用于序列化.

You can dump a coderef with Data::Dumper after setting $Data::Dumper::Deparse to a true value, but this is only intended for debugging purposes, not for serialization.

我建议你回去看看为什么 MooseX::Storage 不适合你，因为作者真的很努力地为 Moose 对象序列化提供了一个抽象的、健壮的解决方案.

I would suggest you go back to looking at why MooseX::Storage isn't working out for you, as the authors tried really hard to present a well-abstracted and robust solution for Moose object serialization.

更新:看起来您在序列化 _offset_sub 属性时遇到了问题，如 这个问题.由于该属性有一个构建器，并且它的构造相当简单(它只查看另一个属性的当前值)，因此您根本不需要序列化它——当您反序列化您的对象并想再次使用它时，构建器将在您第一次调用 $this->offset 时被调用.因此，您应该能够将其标记为不序列化":

Update: it looks like you are running into issues serializing the _offset_sub attribute, as described in this question. Since that attribute has a builder, and its construction is fairly trivial (it just looks at the current value of another attribute), you shouldn't need to serialize it at all -- when you deserialize your object and want to use it again, the builder will be invoked the first time you call $this->offset. Consequently, you should just be able to mark it as "do not serialize":

use MooseX::Storage;

has '_offset_sub' => (
    is       => 'ro',
    isa      => 'CodeRef',
    traits   => [ 'DoNotSerialize' ],
    lazy     => 1,
    builder  => '_build_offset_sub',
    init_arg => undef,
);

最后，这有点正交，但你可以折叠 offset 和_offset_sub 使用原生属性 'Code' trait 将属性组合在一起:

Lastly, this is somewhat orthogonal, but you can fold the offset and _offset_sub attributes together by using the native attribute 'Code' trait:

has offset => (
    is          => 'bare',
    isa         => 'CodeRef',
    traits      => [ qw(Code DoNotSerialize) ],
    lazy        => 1,
    builder     => '_build_offset',
    init_arg    => undef,
    handles     => {
        offset  => 'execute_method',
    },
);

sub _build_offset {
    my ($self) = @_;

    # same as previous _build_offset_sub...
}

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