{"id":45505,"date":"2023-06-11T22:40:30","date_gmt":"2023-09-21T03:27:44","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45505-2\/"},"modified":"2024-04-30T08:28:09","modified_gmt":"2024-04-30T00:28:09","slug":"45505-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45505-2\/","title":{"rendered":""},"content":{"rendered":"<p>\u3053\u3061\u3089\u306f Fusic Advent Calendar 2019 &#8211; Qiita 6\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<br \/>\n\u6628\u65e5\u306f @tsukabo \u306b\u3088\u308b \u793e\u5185\u57fa\u5e79\u30b7\u30b9\u30c6\u30e0\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u306b\u6311\u3093\u3060\u8a71 \u3067\u3057\u305f\u3002<br \/>\n\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u306f\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u5bbf\u547d\u3067\u3082\u3042\u308a\u307e\u3059\u3088\u306d\u3002\u79c1\u3082\u76f4\u8fd1\u3001\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u6848\u4ef6\u304c\u63a7\u3048\u3066\u3044\u308b\u306e\u3067\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f\u3001Rails\u306e\u5927\u5bb9\u91cf\u306eCSV\u30a4\u30f3\u30dd\u30fc\u30c8\u51e6\u7406\u3092Rust\u3067\u66f8\u3044\u3066\u307f\u305f\u4ef6\u3067\u3059\u3002<\/p>\n<h2>\u305f\u3060\u305f\u3060\u3001Rust\u3092\u66f8\u3044\u3066\u307f\u305f\u3044<\/h2>\n<p>Tech\u7cfb\u306e\u30d6\u30ed\u30b0\u3084\u8a18\u4e8b\u3092\u898b\u3066\u308b\u3068\u3001Rust\u3092\u76ee\u306b\u3059\u308b\u6a5f\u4f1a\u304c\u591a\u304f\u306a\u3063\u3066\u304d\u307e\u3057\u305f\u3002\u66f8\u3044\u3066\u307f\u305f\u304f\u306a\u3063\u305f\u306e\u3067\u3001CSV\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u3066DB\u306b\u633f\u5165\u3059\u308b\u51e6\u7406\u3092Rust\u3067\u66f8\u304f\u3068\u3044\u3046\u304a\u984c\u76ee\u3092\u8a2d\u5b9a\u3057\u307e\u3057\u305f\u3002<\/p>\n<h2>\u524d\u63d0<\/h2>\n<p>Rails\u3067\u3001Article\u3068\u3044\u3046\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u3057\u3066\u3001\u7d042\u4e07\u884c\u306eCSV\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3093\u3067\u633f\u5165\u3059\u308b\u3068\u3044\u3046\u30bf\u30b9\u30af\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u3059\u3067\u306bPostgresl\u3067DB\u304c\u3042\u308a\u3001Article\u3068\u3044\u3046\u30c6\u30fc\u30d6\u30eb\u3082\u5b58\u5728\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\nArticle \u306f\u4ee5\u4e0b\u306eschema\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>\r\n<span class=\"n\">create_table<\/span> <span class=\"s2\">\"articles\"<\/span><span class=\"p\">,<\/span> <span class=\"ss\">force: :cascade<\/span> <span class=\"k\">do<\/span> <span class=\"o\">|<\/span><span class=\"n\">t<\/span><span class=\"o\">|<\/span>\r\n    <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">string<\/span> <span class=\"s2\">\"title\"<\/span> <span class=\"c1\"># \u30bf\u30a4\u30c8\u30eb<\/span>\r\n    <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">string<\/span> <span class=\"s2\">\"body\"<\/span> <span class=\"c1\"># \u672c\u6587<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>\u4eca\u56de\u306f\u305d\u306e\u51e6\u7406\u3092Rust\u3067\u66f8\u3044\u3066\u307f\u307e\u3059\u3002<\/p>\n<h2>CSV\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u3066\u3001\u305f\u3060\u8868\u793a\u3059\u308b<\/h2>\n<p>\u307e\u305a\u306fCSV\u30a4\u30f3\u30dd\u30fc\u30c8\u3067\u3059\u304c\u3001Cargo\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u304c\u3042\u308b\u306e\u3067\u305d\u308c\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>[dependencies]\r\ncsv = \"1.1\"\r\n<\/code><\/pre>\n<p>\u6b21\u306b\u3001CSV\u3092\u8aad\u307f\u8fbc\u3093\u3067\u8868\u793a\u3059\u308b\u51e6\u7406\u3067\u3059\u3002\uff08https:\/\/docs.rs\/csv\/ \u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u306e\u901a\u308a\uff09<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">extern<\/span> <span class=\"n\">crate<\/span> <span class=\"n\">rust<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">use<\/span> <span class=\"k\">self<\/span><span class=\"p\">::<\/span><span class=\"nn\">rust<\/span><span class=\"p\">::<\/span><span class=\"o\">*<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"n\">io<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"n\">process<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">read<\/span><span class=\"p\">()<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Result<\/span><span class=\"o\">&lt;<\/span><span class=\"p\">(),<\/span> <span class=\"nb\">Box<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">dyn<\/span> <span class=\"n\">Error<\/span><span class=\"o\">&gt;&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">rdr<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">csv<\/span><span class=\"p\">::<\/span><span class=\"nn\">Reader<\/span><span class=\"p\">::<\/span><span class=\"nf\">from_reader<\/span><span class=\"p\">(<\/span><span class=\"nn\">io<\/span><span class=\"p\">::<\/span><span class=\"nf\">stdin<\/span><span class=\"p\">());<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">result<\/span> <span class=\"n\">in<\/span> <span class=\"n\">rdr<\/span><span class=\"nf\">.records<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">record<\/span> <span class=\"o\">=<\/span> <span class=\"n\">result<\/span><span class=\"o\">?<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">title<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">record<\/span><span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">];<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">body<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">record<\/span><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">];<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"title: {}\"<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">title<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"body: {}\"<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">body<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nf\">Ok<\/span><span class=\"p\">(())<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/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=\"nf\">read<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"error running read: {}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"nn\">process<\/span><span class=\"p\">::<\/span><span class=\"nf\">exit<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5b9f\u884c<\/p>\n<pre class=\"post-pre\"><code>$ cargo run --bin show_csv &lt; sample.csv\r\n\r\ntitle: AAAAAA\r\nbody: BBBBB\r\n<\/code><\/pre>\n<h2>Diesel\u3092\u4f7f\u3063\u3066DB\u3078\u30a2\u30af\u30bb\u30b9\u3059\u308b<\/h2>\n<p>\u6b21\u306b\u3001DB\u3078\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002<br \/>\nRust\u304b\u3089DB\u3078\u30a2\u30af\u30bb\u30b9\u3059\u308b\u65b9\u6cd5\u306f\u3044\u308d\u3044\u308d\u3042\u308a\u307e\u3059\u304c\u3001\u4eca\u56de\u306f\u5c11\u3057\u3067\u3082Rails\u306b\u8fd1\u3044\u611f\u3058\u306b\u3059\u308b\u305f\u3081\u3001ORM\u306e Diesel \u3092\u4f7f\u3044\u307e\u3057\u305f\u3002<\/p>\n<p>\u4ee5\u4e0b\u306f\u3057\u3070\u3089\u304f\u3001 https:\/\/diesel.rs\/guides\/getting-started\/ \u306b\u66f8\u304b\u308c\u3066\u3044\u308b\u901a\u308a\u306e\u8a2d\u5b9a\u304c\u7d9a\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>[dependencies]\r\ndiesel = { version = \"1.0.0\", features = [\"postgres\"] }\r\n<\/code><\/pre>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u63a5\u7d9a\u8a2d\u5b9a\u3092\u74b0\u5883\u5909\u6570\u306b\u30bb\u30c3\u30c8\u3057\u3001\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ echo DATABASE_URL=postgres:\/\/username:password@localhost\/yama_sample &gt; .env\r\n$ diesel setup\r\n<\/code><\/pre>\n<p>\u4f7f\u7528\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u306emigrate\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ diesel migration generate create_articles\r\n<\/code><\/pre>\n<p>\u3059\u308b\u3068migrations\u30d5\u30a9\u30eb\u30c0\u4ee5\u4e0b\u306b\u3001\u30c6\u30fc\u30d6\u30eb\u4f5c\u6210\u3068\u524a\u9664\u7528\u306eSQL\u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3055\u308c\u308b\u306e\u3067\u3001\u9069\u5b9c\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>CREATE TABLE articles (\r\n  id SERIAL PRIMARY KEY,\r\n  title TEXT,\r\n  body TEXT\r\n)\r\n<\/code><\/pre>\n<p>Model\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">use<\/span> <span class=\"nn\">super<\/span><span class=\"p\">::<\/span><span class=\"nn\">schema<\/span><span class=\"p\">::<\/span><span class=\"n\">articles<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nd\">#[derive(Queryable)]<\/span>\r\n<span class=\"k\">pub<\/span> <span class=\"k\">struct<\/span> <span class=\"n\">Article<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"n\">id<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i64<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"n\">title<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"n\">body<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001 id: i32 \u306b\u306a\u3063\u3066\u3044\u307e\u3057\u305f\u304c\u3001Rails\u3067\u4f5c\u3063\u305f\u30c6\u30fc\u30d6\u30eb\u306fBigInt\u3060\u3063\u305f\u305f\u3081\u3001 i64 \u3078\u5909\u66f4\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Schema\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">table!<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nf\">articles<\/span> <span class=\"p\">(<\/span><span class=\"n\">id<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">id<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">BigInt<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">title<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Text<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">body<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Text<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u3061\u3089\u3082id\u3092 Integer\u304b\u3089BigInt\u3078\u5909\u66f4\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u3067\u6700\u4f4e\u9650\u306e\u8a2d\u5b9a\u306f\u5b8c\u4e86\u3067\u3059\u3002<\/p>\n<h2>CSV\u3067\u8aad\u307f\u8fbc\u3093\u3060\u30c7\u30fc\u30bf\u3092\u30c6\u30fc\u30d6\u30eb\u306b\u633f\u5165<\/h2>\n<p>\u3044\u3088\u3044\u3088\u672c\u4e38\u3067\u3059\u3002<br \/>\n\u307e\u305a\u3001Insert\u7528\u306e\u69cb\u9020\u4f53\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">#[derive(Insertable)]<\/span>\r\n<span class=\"nd\">#[table_name=<\/span><span class=\"s\">\"articles\"<\/span><span class=\"nd\">]<\/span>\r\n<span class=\"k\">pub<\/span> <span class=\"k\">struct<\/span> <span class=\"n\">NewArticle<\/span><span class=\"o\">&lt;<\/span><span class=\"nv\">'a<\/span><span class=\"o\">&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"n\">title<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"nb\">str<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"n\">body<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"nb\">str<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6b21\u306b\u3001Insert\u7528\u306e\u95a2\u6570\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"n\">create_article<\/span><span class=\"o\">&lt;<\/span><span class=\"nv\">'a<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">(<\/span><span class=\"n\">conn<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">PgConnection<\/span><span class=\"p\">,<\/span> <span class=\"n\">title<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"nb\">str<\/span><span class=\"p\">,<\/span> <span class=\"n\">body<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"nb\">str<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Article<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">use<\/span> <span class=\"nn\">schema<\/span><span class=\"p\">::<\/span><span class=\"n\">articles<\/span><span class=\"p\">;<\/span>\r\n\r\n    <span class=\"k\">let<\/span> <span class=\"n\">new_article<\/span> <span class=\"o\">=<\/span> <span class=\"n\">NewArticle<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">title<\/span><span class=\"p\">:<\/span> <span class=\"n\">title<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">body<\/span><span class=\"p\">:<\/span> <span class=\"n\">body<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"p\">};<\/span>\r\n\r\n    <span class=\"nn\">diesel<\/span><span class=\"p\">::<\/span><span class=\"nf\">insert_into<\/span><span class=\"p\">(<\/span><span class=\"nn\">articles<\/span><span class=\"p\">::<\/span><span class=\"n\">table<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"nf\">.values<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">new_article<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"nf\">.get_result<\/span><span class=\"p\">(<\/span><span class=\"n\">conn<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"nf\">.expect<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Error saving new article\"<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6700\u5f8c\u306b\u3001CSV\u3092\u8aad\u307f\u8fbc\u307f\u3001\u305d\u306e\u30c7\u30fc\u30bf\u3092DB\u3078Insert\u3059\u308b\u30ed\u30b8\u30c3\u30af\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>\r\n<span class=\"k\">extern<\/span> <span class=\"n\">crate<\/span> <span class=\"n\">rust<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">extern<\/span> <span class=\"n\">crate<\/span> <span class=\"n\">diesel<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">use<\/span> <span class=\"k\">self<\/span><span class=\"p\">::<\/span><span class=\"nn\">rust<\/span><span class=\"p\">::<\/span><span class=\"o\">*<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">error<\/span><span class=\"p\">::<\/span><span class=\"n\">Error<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"n\">io<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"n\">process<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">create<\/span><span class=\"p\">()<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Result<\/span><span class=\"o\">&lt;<\/span><span class=\"p\">(),<\/span> <span class=\"nb\">Box<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">dyn<\/span> <span class=\"n\">Error<\/span><span class=\"o\">&gt;&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">connection<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">establish_connection<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">rdr<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">csv<\/span><span class=\"p\">::<\/span><span class=\"nn\">Reader<\/span><span class=\"p\">::<\/span><span class=\"nf\">from_reader<\/span><span class=\"p\">(<\/span><span class=\"nn\">io<\/span><span class=\"p\">::<\/span><span class=\"nf\">stdin<\/span><span class=\"p\">());<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">result<\/span> <span class=\"n\">in<\/span> <span class=\"n\">rdr<\/span><span class=\"nf\">.records<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">record<\/span> <span class=\"o\">=<\/span> <span class=\"n\">result<\/span><span class=\"o\">?<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">title<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">record<\/span><span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">];<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">body<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">record<\/span><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">];<\/span>\r\n\r\n        <span class=\"k\">let<\/span> <span class=\"n\">article<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">create_article<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">connection<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">title<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">body<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nf\">Ok<\/span><span class=\"p\">(())<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/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=\"nf\">create<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"error running create: {}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"nn\">process<\/span><span class=\"p\">::<\/span><span class=\"nf\">exit<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5b9f\u884c\u3059\u308b\u3068\u3001CSV\u306e\u30c7\u30fc\u30bf\u304c1\u884c\u305a\u3064\u30c6\u30fc\u30d6\u30eb\u306bInsert\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>Rust\u306b\u4efb\u305b\u308b\u306e\u3082\u4e00\u624b<\/h2>\n<p>\u8a73\u7d30\u306b\u691c\u8a3c\u3059\u308b\u3068\u6570\u5024\u304c\u305a\u308c\u308b\u3068\u306f\u601d\u3044\u307e\u3059\u304c\u3001\u901f\u5831\u5024\u3068\u3057\u3066\u3001<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u540c\u3058\u51e6\u7406\u3092Rails\u306e\u307e\u307e\u3067\u3084\u308b: 2\u52067\u79d2<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Rust: 30\u79d2<\/ul>\n<p>\u3068\u3044\u3046\u7d50\u679c\u3067\u3057\u305f\u3002\u3082\u3061\u308d\u3093\u3001Rails\u306e\u65b9\u3067bulk insert\u3092\u4f7f\u3046\u306a\u3069\u3057\u3066\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u3057\u3001\u5358\u7d14\u306b\u6bd4\u8f03\u3059\u308b\u3082\u306e\u3067\u3082\u306a\u3044\u3068\u601d\u3044\u307e\u3059\u3002<br \/>\n\u4eca\u56de\u306f\u3001Rust\u3067\u3084\u3063\u305f\u3089\u3069\u3046\u306a\u308b\u304b\u3068\u3044\u3046\u597d\u5947\u5fc3\u304b\u3089\u5b9f\u88c5\u3057\u307e\u3057\u305f\u304c\u3001Diesel\u3068\u3044\u3046\u5f37\u529b\u306aORM\u3082\u3042\u308b\u3053\u3068\u3067\u3059\u3057\u3001\u3053\u306e\u51e6\u7406\u3092Rust\u306b\u4efb\u305b\u308b\u3068\u3044\u3046\u306e\u306f\u9078\u629e\u80a2\u3068\u3057\u3066\u3042\u308a\u3046\u308b\u306e\u304b\u306a\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u6b21\u306f @kawano-fusic \u306e\u300cS3\u00d7Lambda\u00d7Cloudwatch Events\u3067\u3001\u30d0\u30c3\u30c1\u51e6\u7406\u306e\u76e3\u8996\u6a5f\u69cb\u3092\u7c21\u5358\u306b\u5c0e\u5165\u3059\u308b\u300d\u3067\u3059\u3002<br \/>\n\u306f\u308a\u304d\u3063\u3066\u3069\u3046\u305e\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u3061\u3089\u306f Fusic Advent Calendar 2019 &#8211; Qiita 6\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002 [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45505","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\/45505-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u3053\u3061\u3089\u306f Fusic Advent Calendar 2019 &#8211; Qiita 6\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45505-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-09-21T03:27:44+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-30T00:28:09+00:00\" \/>\n<meta name=\"author\" content=\"\u5b87, \u534e\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta 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