{"version":"1.0","height":"190","blog_title":"A Memorandum","author_name":"Naotsugu","categories":[],"provider_name":"Hatena Blog","width":"100%","published":"2026-02-15 00:00:00","description":"Jakarta EE 12 \u306e Jakarta Persistence 4.0 \u3067\u306f @OneToOne @ManyToOne \u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u30d5\u30a7\u30c3\u30c1\u30bf\u30a4\u30d7\u306e\u6307\u5b9a\u304c\u5909\u66f4\u3055\u308c\u305f\u3002 Issue \u3068 pull request \u306f\u4ee5\u4e0b\u3002 https://github.com/jakartaee/persistence/issues/409 https://github.com/jakartaee/persistence/pull/455 @OneToOne \u3068 @ManyToOne \u306e FetchType \u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u306f FetchType.EAGER \u3067\u3042\u308a\u3001 \u3053\u308c\u306f\u3001N + 1 \u9078\u629e\u3092\u8a98\u2026","author_url":"https://blog.hatena.ne.jp/Naotsugu/","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog1.mammb.com%2Fentry%2F2026%2F02%2F15%2F000000\" title=\"Jakarta Persistence 4.0 - @OneToOne @ManyToOne \u95a2\u9023\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u30d5\u30a7\u30c3\u30c1\u30bf\u30a4\u30d7\u6307\u5b9a - - A Memorandum\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://blog1.mammb.com/entry/2026/02/15/000000","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/N/Naotsugu/20251217/20251217180124.png","type":"rich","blog_url":"https://blog1.mammb.com/","title":"Jakarta Persistence 4.0 - @OneToOne @ManyToOne \u95a2\u9023\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u30d5\u30a7\u30c3\u30c1\u30bf\u30a4\u30d7\u6307\u5b9a -"}