{"id":398,"date":"2020-04-23T15:38:18","date_gmt":"2020-04-23T06:38:18","guid":{"rendered":"https:\/\/technologyagency.net\/wordpress\/?p=398"},"modified":"2020-04-23T16:31:47","modified_gmt":"2020-04-23T07:31:47","slug":"jpa%e3%81%ae%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%b3%e3%82%b9%e6%94%b9%e5%96%84","status":"publish","type":"post","link":"https:\/\/technologyagency.net\/wordpress\/2020\/04\/23\/jpa%e3%81%ae%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%b3%e3%82%b9%e6%94%b9%e5%96%84\/","title":{"rendered":"JPA\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584"},"content":{"rendered":"\n<p>\u4f7f\u3044\u65b9\u306b\u3088\u3063\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5927\u304d\u304f\u5909\u308f\u308b\u3002\u3053\u3046\u3044\u3046\u4f7f\u3044\u65b9\u304c\u99c4\u76ee\u3068\u3044\u3046\u308f\u3051\u3067\u306f\u306a\u304f\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u5225\u306e\u65b9\u6cd5\u3092\u8a66\u3057\u305f\u65b9\u304c\u826f\u3044\u3068\u3044\u3046\u4f8b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\uff11\uff0e\u554f\u984c\u70b9<\/h2>\n\n\n\n<p>\u300c<a href=\"https:\/\/technologyagency.net\/wordpress\/2020\/03\/31\/yomou-crawler-%e7%ac%ac2%e5%9b%9e-%e3%82%af%e3%83%a9%e3%82%b9%e5%9b%b3%e3%81%ae%e4%bd%9c%e6%88%90\/\">[YOMOU CRAWLER] \u7b2c2\u56de \u30af\u30e9\u30b9\u56f3\u306e\u4f5c\u6210<\/a>\u300d\u306b\u3042\u308b\u901a\u308aNovel\u306b\u306f\u8907\u6570\u306eHistory\u304c\u3042\u3063\u3066\u3001\u66f4\u65b0\u306e\u3042\u308b\u5ea6\u306b\u8ffd\u52a0\u4fdd\u5b58\u3057\u3066\u3044\u308b\u3002<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: java; title: ; notranslate\" title=\"\">\n\/\/ \uff11\uff0eNovel\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\npublic class Novel extends BaseObject implements Serializable {\n\n    \/** \u5c0f\u8aac\u306e\u66f4\u65b0\u5c65\u6b74\u30bb\u30c3\u30c8 *\/\n    @OneToMany(fetch = FetchType.LAZY, mappedBy = &quot;novel&quot;, cascade = CascadeType.ALL, orphanRemoval = true)\n    private Set&lt;NovelHistory&gt; novelHistories = new HashSet&lt;&gt;();\n\n    public void addNovelHistory(NovelHistory novelHistory) {\n        novelHistories.add(novelHistory);\n        novelHistory.setNovel(this);\n    }\n<\/pre><\/div>\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: java; title: ; notranslate\" title=\"\">\n\/\/ \uff12\uff0eNovel\u306e\u66f4\u65b0\u5c65\u6b74\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\npublic class NovelHistory extends BaseObject implements Serializable {\n\n    \/** \u5c0f\u8aac *\/\n    @ManyToOne(fetch = FetchType.LAZY)\n    @JoinColumn(name = &quot;novel_id&quot;)\n    private Novel novel;\n<\/pre><\/div>\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: java; title: ; notranslate\" title=\"\">\n\/\/ \uff13\uff0e\u4f7f\u7528\u7b87\u6240\n\/\/ Novel\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u6c38\u7d9a\u5316\u6e08\u307f\nif (novelHistory != null) {\n    \/\/ \u5c0f\u8aac\u306e\u66f4\u65b0\u5c65\u6b74\u304c\u4f5c\u6210\u3055\u308c\u305f\u5834\u5408\n    novel.addNovelHistory(novelHistory);\n}\n<\/pre><\/div>\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u6c38\u7d9a\u5316\u3055\u308c\u305f\u72b6\u614b\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306bAdd\u3059\u308b\u3060\u3051\u3067\u81ea\u52d5\u7684\u306bInsert\u6587\u304c\u767a\u884c\u3055\u308c\u308b\u305f\u3081\u3001Java\u306e\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u958b\u767a\u306b\u96c6\u4e2d\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u3002\u901a\u5e38\u306f\u3053\u308c\u3067\u554f\u984c\u306a\u3044\u306e\u3060\u304c\u3001NovelHistory\u306b\u65e2\u306b\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u304c\u4fdd\u5b58\u3055\u308c\u3066\u3044\u308b\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u554f\u984c\u306b\u306a\u308b\u3002<\/p>\n\n\n\n<p>FetchType.LAZY\u3092\u6307\u5b9a\u3057\u3066\u3044\u308b\u305f\u3081\u3001novelHistories.add(novelHistory)\u3092\u5b9f\u884c\u3059\u308b\u3068\u304d\u306b\u95a2\u9023\u3059\u308bHistory\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089Select\u3055\u308c\u3001novelHistories\u5909\u6570\u306b\u683c\u7d0d\u3055\u308c\u308b\u3002\u4e0a\u8a18\u306e\u4f8b\u3067\u306fInsert\u524d\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306aSQL\u304c\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: sql; gutter: false; title: ; notranslate\" title=\"\">\nselect \u7701\u7565 from novel_history where novel_id = ?;\n<\/pre><\/div>\n\n\n<p>\u3064\u307e\u308a\u30011\u4ef6\u8ffd\u52a0\u3057\u305f\u3044\u3060\u3051\u306a\u306e\u306b\u95a2\u9023\u3059\u308b\u5168\u3066\u306eHistory\u3092Select\u3057\u3066\u3057\u307e\u3063\u3066\u3044\u308b\u3002\u4f55\u5343\u4ef6\u3082History\u304c\u3042\u308c\u3070\u305d\u308c\u3060\u3051\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u60aa\u5316\u3059\u308b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\uff12\uff0e\u56de\u907f\u7b56<\/h2>\n\n\n\n<p>\u4eca\u56de\u306f\u4ee5\u4e0b\u306e\u69d8\u306b\u4fee\u6b63\u3057\u3066\u3053\u306e\u554f\u984c\u3092\u56de\u907f\u3057\u305f\u3002<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: java; title: ; notranslate\" title=\"\">\n\/\/ \uff13\u2019\uff0e\u4f7f\u7528\u7b87\u6240\nif (novelHistory != null) {\n    \/\/ \u5c0f\u8aac\u306e\u66f4\u65b0\u5c65\u6b74\u304c\u4f5c\u6210\u3055\u308c\u305f\u5834\u5408\n    novelHistory.setNovel(novel);\n}\n<\/pre><\/div>\n\n\n<p>novelHistory\u306f\u6c38\u7d9a\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u305f\u3081\u3001\u9069\u5207\u306a\u7b87\u6240\u3067save\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304c\u3001\u3053\u3046\u3059\u308c\u3070\u5358\u7d14\u306bInsert\u6587\u306e\u307f\u767a\u884c\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u3044\u65b9\u306b\u3088\u3063\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5927\u304d\u304f\u5909\u308f\u308b\u3002\u3053\u3046\u3044\u3046\u4f7f\u3044\u65b9\u304c\u99c4\u76ee\u3068\u3044\u3046\u308f\u3051\u3067\u306f\u306a\u304f\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u5225\u306e\u65b9\u6cd5\u3092\u8a66\u3057\u305f\u65b9\u304c\u826f\u3044\u3068\u3044\u3046\u4f8b\u3002 \uff11\uff0e\u554f\u984c\u70b9 \u300c[YOMOU CRAWLER] \u7b2c2\u56de \u30af\u30e9\u30b9\u56f3\u306e\u4f5c\u6210\u300d\u306b\u3042\u308b\u901a\u308aNov &hellip; <a href=\"https:\/\/technologyagency.net\/wordpress\/2020\/04\/23\/jpa%e3%81%ae%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%b3%e3%82%b9%e6%94%b9%e5%96%84\/\" class=\"more-link\"><span class=\"screen-reader-text\">&#8220;JPA\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584&#8221; \u306e<\/span>\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[36,33],"class_list":["post-398","post","type-post","status-publish","format-standard","hentry","category-java","tag-hibernate","tag-java-persistence-api"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>JPA\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584 - I want to lead an easy life.<\/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:\/\/technologyagency.net\/wordpress\/2020\/04\/23\/jpa\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JPA\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584 - I want to lead an easy life.\" \/>\n<meta property=\"og:description\" content=\"\u4f7f\u3044\u65b9\u306b\u3088\u3063\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5927\u304d\u304f\u5909\u308f\u308b\u3002\u3053\u3046\u3044\u3046\u4f7f\u3044\u65b9\u304c\u99c4\u76ee\u3068\u3044\u3046\u308f\u3051\u3067\u306f\u306a\u304f\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u5225\u306e\u65b9\u6cd5\u3092\u8a66\u3057\u305f\u65b9\u304c\u826f\u3044\u3068\u3044\u3046\u4f8b\u3002 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