{"id":364,"date":"2022-02-22T19:48:36","date_gmt":"2022-02-22T10:48:36","guid":{"rendered":"https:\/\/tako.nakano.net\/blog\/?p=364"},"modified":"2022-02-22T19:48:36","modified_gmt":"2022-02-22T10:48:36","slug":"use_composite_id_using_entity_with_jpa","status":"publish","type":"post","link":"https:\/\/tako.nakano.net\/blog\/2022\/02\/use_composite_id_using_entity_with_jpa\/","title":{"rendered":"Java JPA \u3067\u3001Entity \u3092 CompositeId \u3068\u3059\u308b"},"content":{"rendered":"<p><a href=\"https:\/\/stackoverflow.com\/questions\/50102605\/nesting-idclass-working-up-to-3rd-level\">https:\/\/stackoverflow.com\/questions\/50102605\/nesting-idclass-working-up-to-3rd-level<\/a><\/p>\n<p>\u3092\u898b\u3066\u3084\u3063\u3068\u308f\u304b\u3063\u305f<\/p>\n<pre><code class=\"language-java\">@Entity\npublic class Foo{\n\n  @Id\n  private Integer FooNumber;\n\n  private boolean available;\n  public Foo(){}\n}<\/code><\/pre>\n<pre><code class=\"language-java\">@Entity\n@IdClass(Bar.BarId.class)\npublic class Bar{\n\n  @Id\n  private Integer barNumber;\n\n  @Id\n  @ManyToOne(cascade = {CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH, CascadeType.DETACH})\n  private Foo foo;\n\n  public Bar(){}\n\n  \/\/removed getters setters\n\n  static class BarId  implements Serializable {\n\n        private Integer barNumber;\n        private Integer foo;\n\n        public BarId() {\n           \/\/JPA\n        } \/\/removed getters setters\n    }}<\/code><\/pre>\n<p>\u3068\u3042\u308b\u3088\u3046\u306b\u3001<code>private Foo foo;<\/code> \u3068\u3044\u3046\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u6301\u3063\u3066\u3044\u308b\u3068\u304d\u306b\u3001id \u7528\u306e\u5b50\u30af\u30e9\u30b9\u3067\u3042\u308b <code>BarId<\/code> \u306e <code>foo<\/code> \u3068\u3044\u3046\u300c\u540c\u3058\u30d7\u30ed\u30d1\u30c6\u30a3\u540d\u300d\u3092\u7d50\u3073\u4ed8\u3051\u3066\u3042\u3052\u308b\u2026\u3068\u3044\u3046\u3053\u3068\u304c\u5927\u4e8b\u3060\u3063\u305f\u3088\u3046\u3060\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>https:\/\/stackoverflow.com\/questions\/50102605\/nesting-idclass-working-up-to-3rd-level \u3092\u898b\u3066\u3084\u3063\u3068\u308f\u304b\u3063\u305f @Entity public [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-364","post","type-post","status-publish","format-standard","hentry","category-misc"],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p4dIdP-5S","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/tako.nakano.net\/blog\/wp-json\/wp\/v2\/posts\/364","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tako.nakano.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tako.nakano.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tako.nakano.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tako.nakano.net\/blog\/wp-json\/wp\/v2\/comments?post=364"}],"version-history":[{"count":2,"href":"https:\/\/tako.nakano.net\/blog\/wp-json\/wp\/v2\/posts\/364\/revisions"}],"predecessor-version":[{"id":366,"href":"https:\/\/tako.nakano.net\/blog\/wp-json\/wp\/v2\/posts\/364\/revisions\/366"}],"wp:attachment":[{"href":"https:\/\/tako.nakano.net\/blog\/wp-json\/wp\/v2\/media?parent=364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tako.nakano.net\/blog\/wp-json\/wp\/v2\/categories?post=364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tako.nakano.net\/blog\/wp-json\/wp\/v2\/tags?post=364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}