{"id":45742,"date":"2023-03-29T16:43:35","date_gmt":"2023-12-29T03:22:26","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45742-2\/"},"modified":"2024-04-29T21:02:26","modified_gmt":"2024-04-29T13:02:26","slug":"45742-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45742-2\/","title":{"rendered":""},"content":{"rendered":"<h1>\u306f\u3058\u3081\u306b<\/h1>\n<p>LIFULL\u305d\u306e2 Advent Calendar 2020 &#8211; Qiita\u306e12\u65e5\u76ee\u306e\u8a18\u4e8b\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\nRust\u3067Clean Architecture\u3067Web Application\u3092\u4f5c\u308d\u3046\u3068\u3057\u307e\u3057\u305f\u304c\u3001\u6295\u7a3f\u306b\u9045\u523b\u3057\u3066\u3044\u308b\u306e\u3067(13\u65e5\u306b\u66f8\u3044\u3066\u308b)\u59a5\u5354\u3057\u3066ValueObject\u3092\u4f7f\u3046\u306b\u3042\u305f\u3063\u3066\u8abf\u67fb\u3057\u305f\u3053\u3068\u3092\u8a18\u4e8b\u306b\u3057\u3088\u3046\u3068\u601d\u3044\u307e\u3059\u6c57<br \/>\n\u8a18\u4e8b\u3092\u65e9\u304f\u4f5c\u308b\u305f\u3081\u7b87\u6761\u66f8\u304d\u3092\u591a\u7528\u3057\u3066\u307e\u3059\u3002<\/p>\n<h1>\u5148\u884c\u5b9f\u88c5<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5de8\u4eba\u306e\u80a9\u306b\u4e57\u308b\u305f\u3081\u3001\u3059\u3067\u306b\u3053\u308c\u306b\u3064\u3044\u3066\u306e\u5148\u884c\u5b9f\u88c5\u3092\u8abf\u3079\u307e\u3057\u305f\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u3042\u307e\u308a\u30d2\u30c3\u30c8\u3059\u308b\u3082\u306e\u306f\u306a\u304b\u3063\u305f\u3082\u306e\u306e\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u304c\u975e\u5e38\u306b\u826f\u304b\u3063\u305f\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>DDD\u306e\u30d1\u30bf\u30fc\u30f3\u3092Rust\u3067\u8868\u73fe\u3059\u308b ~ Value Object\u7de8 ~ &#8211; CADDi Tech Blog<\/p>\n<p>ddd-in-rust\/chapter02_value_object\/src at master \u00b7 kuwana-kb\/ddd-in-rust<\/p>\n<h1>\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4ee5\u4e0b\u306e\u90e8\u5206\u306b\u3064\u3044\u3066\u8003\u3048\u3066\u307f\u305f\u3053\u3068\u3092\u5217\u6319\u3057\u3066\u307f\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u4f8b\u3068\u3057\u3066\u306fUser\u3092\u984c\u6750\u306b\u3057\u307e\u3059\u3002<\/ul>\n<h2>\u4f55\u3082\u8003\u3048\u305a\u3068\u308a\u3042\u3048\u305a\u7bb1\u3092\u3064\u304f\u308b<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">pub<\/span> <span class=\"k\">struct<\/span> <span class=\"n\">User<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">mail<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">impl<\/span> <span class=\"n\">User<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">,<\/span> <span class=\"n\">mail<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Self<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">Self<\/span> <span class=\"p\">{<\/span> <span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"n\">name<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">(),<\/span> <span class=\"n\">mail<\/span><span class=\"p\">:<\/span> <span class=\"n\">mail<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">()<\/span> <span class=\"p\">};<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"nd\">#[test]<\/span>\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">new_test<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">user<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">User<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u30e6\u30fc\u30b6\u540d\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"hoge@example.com\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">assert<\/span><span class=\"o\">!<\/span><span class=\"p\">(<\/span><span class=\"n\">user<\/span><span class=\"py\">.name<\/span> <span class=\"o\">==<\/span> <span class=\"s\">\"\u30e6\u30fc\u30b6\u540d\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">assert<\/span><span class=\"o\">!<\/span><span class=\"p\">(<\/span><span class=\"n\">user<\/span><span class=\"py\">.mail<\/span> <span class=\"o\">==<\/span> <span class=\"s\">\"hoge@example.com\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<p>class\u306f\u306a\u3044\u306e\u3067struct\u3068impl\u3092\u3064\u304b\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n\u307e\u305f(1)struct\u306e\u307b\u3046\u3067\u306fString\u3067\u53d7\u3051\u53d6\u3063\u3066\u3001(2)new\u3067\u306f&amp;str\u3067\u53d7\u3051\u53d6\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>(1)\u306b\u3057\u3066\u3044\u308b\u306e\u306f\u3001\u6587\u5b57\u5217\u306e\u64cd\u4f5c\u3067String\u306b\u306e\u307b\u3046\u304c\u306a\u3093\u3084\u304b\u3093\u3084\u67d4\u8edf\u306b\u4f7f\u3048\u308b\u304b\u3089\u3001\u3068\u3044\u3046\u7406\u7531\u3067\u3059\u3002<br \/>\n(2)\u306b\u3057\u3066\u3044\u308b\u306e\u306fnew\u3092\u3059\u308b\u969b\u306b\u6bce\u56de&#8221;text&#8221;.to_string()\u3068\u66f8\u304f\u306e\u304c\u30c0\u30eb\u3044\u304b\u3089\u3067\u3059\u3002<\/p>\n<h3>\u554f\u984c\u70b9<\/h3>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u3053\u306e\u307e\u307e\u3060\u3068\u3001validation\u3092\u3069\u3046\u66f8\u3051\u3070\u3044\u3044\u304b\u308f\u304b\u3089\u306a\u3044\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">email\u304c\u4e0d\u6b63\u306a\u5024\u3060\u3063\u305f\u3089new\u306e\u4e2d\u3067\u305d\u306e\u51e6\u7406\u66f8\u304d\u305f\u3044\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u66f8\u3044\u305f\u3068\u3057\u3066\u305d\u306e\u4e2d\u3067panic\u3092\u8d77\u3053\u3055\u305b\u308b\u3053\u3068\u3057\u304b\u3067\u304d\u306a\u3044\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u6b63\u3057\u3044\u5024\u3067\u306f\u306a\u304b\u3063\u305f\u3089\u3001\u4f55\u304b\u3057\u3089\u306e\u624b\u6bb5\u3067Application\u306b\u30a8\u30e9\u30fc\u3092\u6e21\u3057\u305f\u3044\u3067\u3059\u3002<\/ul>\n<h2>new\u306e\u8fd4\u308a\u5024\u306bOption\u3092\u3064\u304b\u3046<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">pub<\/span> <span class=\"k\">struct<\/span> <span class=\"n\">User<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">mail<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">impl<\/span> <span class=\"n\">User<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">,<\/span> <span class=\"n\">mail<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">Option<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">Self<\/span><span class=\"o\">&gt;<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"c\">\/\/ from https:\/\/qiita.com\/sakuro\/items\/1eaa307609ceaaf51123<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">re<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">Regex<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"s\">r#\"^[a-zA-Z0-9.!#$%&amp;'*+\/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\\.[a-zA-Z0-9-]+)*$\"#<\/span><span class=\"p\">)<\/span>\r\n            <span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n        <span class=\"c\">\/\/ validation for params<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">name<\/span><span class=\"nf\">.len<\/span><span class=\"p\">()<\/span> <span class=\"o\">&lt;=<\/span> <span class=\"mi\">0<\/span> <span class=\"p\">||<\/span> <span class=\"n\">name<\/span><span class=\"nf\">.len<\/span><span class=\"p\">()<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"mi\">30<\/span> <span class=\"p\">||<\/span> <span class=\"o\">!<\/span><span class=\"n\">re<\/span><span class=\"nf\">.is_match<\/span><span class=\"p\">(<\/span><span class=\"n\">mail<\/span><span class=\"p\">)<\/span>  <span class=\"p\">{<\/span>\r\n            <span class=\"k\">return<\/span> <span class=\"nb\">None<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nf\">Some<\/span><span class=\"p\">(<\/span><span class=\"n\">Self<\/span> <span class=\"p\">{<\/span> <span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"n\">name<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">(),<\/span> <span class=\"n\">mail<\/span><span class=\"p\">:<\/span> <span class=\"n\">mail<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">()<\/span> <span class=\"p\">});<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"nd\">#[test]<\/span>\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">new_test<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">op_user<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">User<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u30e6\u30fc\u30b6\u540d\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"hoge@example.com\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">assert<\/span><span class=\"o\">!<\/span><span class=\"p\">(<\/span><span class=\"n\">op_user<\/span> <span class=\"o\">!=<\/span> <span class=\"nb\">None<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">user<\/span> <span class=\"o\">=<\/span> <span class=\"n\">op_user<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"k\">assert<\/span><span class=\"o\">!<\/span><span class=\"p\">(<\/span><span class=\"n\">user<\/span><span class=\"py\">.name<\/span> <span class=\"o\">==<\/span> <span class=\"s\">\"\u30e6\u30fc\u30b6\u540d\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">assert<\/span><span class=\"o\">!<\/span><span class=\"p\">(<\/span><span class=\"n\">user<\/span><span class=\"py\">.mail<\/span> <span class=\"o\">==<\/span> <span class=\"s\">\"hoge@example.com\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>new\u304cNone\u304bSome(T)\u3067\u8fd4\u5374\u3055\u308c\u308b\u3053\u3068\u306b\u3088\u3063\u3066ValueObject\u751f\u6210\u306e\u6210\u5426\u3092\u691c\u77e5\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3002<br \/>\n\u751f\u6210\u5f8c\u3001\u5224\u5b9a\u3092\u6b63\u3057\u304f\u884c\u3046\u5834\u5408\u3001match\u3092\u4f7f\u3046\u304b\u3001unwrap\u3084unwrap_or\u306a\u3069\u3092\u4f7f\u3046\u304b\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u306f?\u3092\u4f7f\u3046\u306e\u3082\u3042\u308a\u3067\u3059\u306d<\/p>\n<p>std::option::Option &#8211; Rust<br \/>\n?\u306b\u3088\u308bOption\u306e\u30a2\u30f3\u30d1\u30c3\u30af &#8211; Rust By Example \u65e5\u672c\u8a9e\u7248<\/p>\n<h3>\u6c17\u306b\u306a\u308b\u70b9<\/h3>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u6bce\u56de\u751f\u6210\u304c\u6b63\u3057\u3044\u304b\u3001\u751f\u6210\u304c\u6210\u529f\u3057\u305f\u304b\u5224\u5b9a\u3092\u3057\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u305f\u3081\u3001ValueObject\u3092\u5927\u91cf\u306b\u751f\u6210\u3059\u308b\u5834\u5408\u3001\u306e\u3044\u3044\u30a2\u30a4\u30c7\u30a3\u30a2\u304c\u306a\u3044\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>trait ValueObject\u3092\u4f5c\u3063\u3066\u3044\u3044\u611f\u3058\u306b\u307e\u3068\u3081\u3066\u751f\u6210\u3068\u304b\u8003\u3048\u3088\u3046\u3068\u3057\u307e\u3057\u305f\u304c\u3001\u77e5\u8b58\u4e0d\u8db3\u3082\u76f8\u307e\u3063\u3066\u30d1\u30f3\u30af\u3057\u307e\u3057\u305f\u3002<br \/>\n\u305f\u3060\u3057\u5fc5\u8981\u306a\u51e6\u7406\u3060\u3068\u601d\u3046\u306e\u3067\u3001\u5927\u304d\u306a\u30c7\u30e1\u30ea\u30c3\u30c8\u3068\u306f\u601d\u3044\u307e\u305b\u3093\u3002<\/p>\n<p>None\u304c\u6e21\u3055\u308c\u305f\u3068\u304d\u3001\u4f55\u304c\u9593\u9055\u3063\u3066None\u304c\u8fd4\u3055\u308c\u305f\u306e\u304b\u308f\u304b\u3089\u306a\u3044<\/p>\n<h2>new\u306e\u8fd4\u308a\u5024\u306bResult&lt;Self, E&gt;\u3092\u3064\u304b\u3046<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">use<\/span> <span class=\"nn\">regex<\/span><span class=\"p\">::<\/span><span class=\"n\">Regex<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">pub<\/span> <span class=\"k\">struct<\/span> <span class=\"n\">MyError<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">message<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">impl<\/span> <span class=\"n\">MyError<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Self<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">Self<\/span> <span class=\"p\">{<\/span> <span class=\"n\">message<\/span><span class=\"p\">:<\/span> <span class=\"n\">name<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">()<\/span> <span class=\"p\">};<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">pub<\/span> <span class=\"k\">struct<\/span> <span class=\"n\">MyUser<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">mail<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">impl<\/span> <span class=\"n\">MyUser<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ MyError\u306f\u81ea\u5206\u3067\u5b9a\u7fa9\u3057\u305f\u3082\u306e\u3068\u8aad\u307f\u66ff\u3048\u3066\u304f\u3060\u3055\u3044<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">,<\/span> <span class=\"n\">mail<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Result<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">Self<\/span><span class=\"p\">,<\/span> <span class=\"n\">MyError<\/span><span class=\"o\">&gt;<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"c\">\/\/ from https:\/\/qiita.com\/sakuro\/items\/1eaa307609ceaaf51123<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">re<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">Regex<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"s\">r#\"^[a-zA-Z0-9.!#$%&amp;'*+\/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\\.[a-zA-Z0-9-]+)*$\"#<\/span><span class=\"p\">)<\/span>\r\n            <span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n        <span class=\"c\">\/\/ validation for params<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">name<\/span><span class=\"nf\">.len<\/span><span class=\"p\">()<\/span> <span class=\"o\">&lt;=<\/span> <span class=\"mi\">0<\/span> <span class=\"p\">||<\/span> <span class=\"n\">name<\/span><span class=\"nf\">.len<\/span><span class=\"p\">()<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"mi\">30<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">return<\/span> <span class=\"nf\">Err<\/span><span class=\"p\">(<\/span><span class=\"nn\">MyError<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u540d\u524d\u306f0\u6587\u5b57\u4ee5\u4e0a30\u6587\u5b57\u4ee5\u4e0b\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\"<\/span><span class=\"p\">));<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"o\">!<\/span><span class=\"n\">re<\/span><span class=\"nf\">.is_match<\/span><span class=\"p\">(<\/span><span class=\"n\">mail<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">return<\/span> <span class=\"nf\">Err<\/span><span class=\"p\">(<\/span><span class=\"nn\">MyError<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"s\">\"email\u304c\u4e0d\u6b63\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3059\"<\/span><span class=\"p\">));<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nf\">Ok<\/span><span class=\"p\">(<\/span><span class=\"n\">Self<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"n\">name<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">(),<\/span>\r\n            <span class=\"n\">mail<\/span><span class=\"p\">:<\/span> <span class=\"n\">mail<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">(),<\/span>\r\n        <span class=\"p\">});<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nd\">#[test]<\/span>\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">test<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">usr1<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">MyUser<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u30e6\u30fc\u30b6\u540d\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"hoge@example.com\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">assert<\/span><span class=\"o\">!<\/span><span class=\"p\">(<\/span><span class=\"n\">usr1<\/span><span class=\"nf\">.is_ok<\/span><span class=\"p\">());<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">user<\/span> <span class=\"o\">=<\/span> <span class=\"n\">usr1<\/span><span class=\"nf\">.ok<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"nd\">assert_eq!<\/span><span class=\"p\">(<\/span><span class=\"n\">user<\/span><span class=\"py\">.name<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"\u30e6\u30fc\u30b6\u540d\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nd\">assert_eq!<\/span><span class=\"p\">(<\/span><span class=\"n\">user<\/span><span class=\"py\">.mail<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"hoge@example.com\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">usr2<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">MyUser<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"s\">\"\u30e6\u30fc\u30b6\u540d\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"hoge\/example.com\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">assert<\/span><span class=\"o\">!<\/span><span class=\"p\">(<\/span><span class=\"n\">usr2<\/span><span class=\"nf\">.is_err<\/span><span class=\"p\">());<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"k\">let<\/span> <span class=\"nf\">Err<\/span><span class=\"p\">(<\/span><span class=\"n\">err<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"n\">usr2<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">assert_eq!<\/span><span class=\"p\">(<\/span><span class=\"n\">err<\/span><span class=\"py\">.message<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"email\u304c\u4e0d\u6b63\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3059\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4eca\u56de\u306f\u4f7f\u3063\u3066\u306a\u3044\u3067\u3059\u304c\u3001error\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u5468\u308a\u306f\u306f\u73fe\u5728thiserror\u3067Error\u3092\u81ea\u4f5c\u3057\u3066\u3001anyhow\u3067\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u3092\u304b\u304f\u3068\u826f\u3044\u305d\u3046\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>Rust\u306e\u30a8\u30e9\u30fc\u51e6\u7406 &#8211; Qiita<br \/>\ndtolnay\/thiserror: derive(Error) for struct and enum error types<br \/>\ndtolnay\/anyhow: Flexible concrete Error type built on std: :Error<br \/>\n\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u4f8b<\/p>\n<p>ddd-in-rust\/lib.rs at master \u00b7 kuwana-kb\/ddd-in-rust<\/p>\n<p>https:\/\/github.com\/kuwana-kb\/ddd-in-rust\/blob\/master\/chapter02_value_object\/src\/a3_all_vo.rs#L38<\/p>\n<h3>\u6c17\u306b\u306a\u308b\u70b9<\/h3>\n<p>Option\u3092\u4f7f\u3046\u5834\u5408\u3082\u540c\u69d8\u306b\u66f8\u304d\u307e\u3057\u305f\u304c\u3001\u5927\u91cf\u306bValueObject\u3092\u751f\u6210\u3059\u308b\u969b\u306b\u5de5\u592b\u3057\u306a\u3044\u3068\u30b3\u30fc\u30c9\u304c\u304d\u305f\u306a\u304f\u306a\u308a\u305d\u3046\u3067\u3059\u3002<br \/>\n\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u3057\u3063\u304b\u308a\u53d6\u308c\u308b\u3068\u3053\u308d\u306f\u3044\u3044\u3067\u3059\u306d\u3002<\/p>\n<h1>\u307e\u3068\u3081<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5c11\u306a\u3044\u3067\u3059\u304c\u3001\u4e00\u65e6\u3053\u3053\u3089\u3078\u3093\u7d42\u308f\u308a\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u79c1\u898b\u3067\u3059\u304c\u3001\u4eca\u5217\u6319\u3057\u305f\u4e2d\u3067\u306f\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u3057\u3063\u304b\u308a\u66f8\u304f\u306a\u3089Result\u3067\u3001\u6210\u5426\u306e\u30a8\u30e9\u30fc\u3092\u3072\u3068\u307e\u3068\u3081\u306b\u6271\u3046\u3001\u3068\u304b\u306a\u3089Option\u3067\u3044\u3044\u306e\u304b\u306a\u3001\u3068\u304a\u3082\u3063\u305f\u308a\u3057\u307e\u3057\u305f\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>\u305f\u3060\u3057\u3001Rust\u306e\u304a\u4f5c\u6cd5\u3068\u3057\u3066\u3001\u3082\u3063\u3068\u3044\u3044\u66f8\u304d\u65b9\u3042\u308a\u305d\u3046\u306a\u6c17\u3082\u3059\u308b\u306e\u3067\u81ea\u4fe1\u306f\u306a\u3044\u3067\u3059\u3002<br \/>\n\u30b5\u30af\u30c3\u3068\u4f5c\u308b\u306a\u3089Option\u3001\u3057\u3063\u304b\u308a\u3064\u304f\u308b\u306a\u3089Result\u3067\u3059\u304b\u306d\u3002<\/p>\n<p>\u4f59\u8ac7\u3067\u3059\u304c\u3001Rust\u306e\u6a19\u6e96\u306b\u7528\u610f\u3055\u308c\u3066\u3044\u308b\u95a2\u6570\u304c\u975e\u5e38\u306b\u591a\u304f\u3066\u9a5a\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u307e\u3060\u8a66\u3057\u3066\u3044\u306a\u3044\u95a2\u6570\u306a\u3069\u3082\u3042\u308b\u306e\u3067\u3001\u8272\u3005\u8a66\u884c\u932f\u8aa4\u3057\u305f\u3044\u3067\u3059\u3002<\/p>\n<p>owari<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u306f\u3058\u3081\u306b LIFULL\u305d\u306e2 Advent Calendar 2020 &#8211; Qiita\u306e12\u65e5\u76ee\u306e [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45742","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/45742-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u306f\u3058\u3081\u306b LIFULL\u305d\u306e2 Advent Calendar 2020 &#8211; Qiita\u306e12\u65e5\u76ee\u306e [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45742-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-12-29T03:22:26+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-29T13:02:26+00:00\" \/>\n<meta name=\"author\" content=\"\u79d1, \u96c5\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u79d1, \u96c5\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/45742-2\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/45742-2\/\",\"name\":\"- 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Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/45742-2\/","og_locale":"zh_CN","og_type":"article","og_description":"\u306f\u3058\u3081\u306b LIFULL\u305d\u306e2 Advent Calendar 2020 &#8211; Qiita\u306e12\u65e5\u76ee\u306e [&hellip;]","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/45742-2\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-12-29T03:22:26+00:00","article_modified_time":"2024-04-29T13:02:26+00:00","author":"\u79d1, \u96c5","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u79d1, \u96c5","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"2 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/45742-2\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/45742-2\/","name":"- Blog - Silicon 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