{"id":1526,"date":"2020-12-23T19:34:53","date_gmt":"2020-12-23T10:34:53","guid":{"rendered":"https:\/\/www.skyer9.pe.kr\/wordpress\/?p=1526"},"modified":"2020-12-24T22:11:35","modified_gmt":"2020-12-24T13:11:35","slug":"a-different-object-with-the-same-identifier-value-was-already-associated-with-the-session","status":"publish","type":"post","link":"https:\/\/www.skyer9.pe.kr\/wordpress\/?p=1526","title":{"rendered":"A different object with the same identifier value was already associated with the session"},"content":{"rendered":"<h1>A different object with the same identifier value was already associated with the session<\/h1>\n<h2>\uc6d0\uc778<\/h2>\n<p>\ud558\ub098\uc758 \uc138\uc158(\ub7f0\ud0c0\uc784) \ub3d9\uc548 \ub3d9\uc77c\ud55c PK \uc758 \uc5d4\ud130\ud2f0\uac00 \ub450\uac1c \uc774\uc0c1 \uc874\uc7ac\ud560 \ub54c \ubc1c\uc0dd\ud55c\ub2e4.<\/p>\n<p>\uc77c\ubc18\uc801\uc73c\ub85c\ub294 \ub3d9\uc77c\ud55c PK \uc758 \uc5d4\ud130\ud2f0\ub97c 2\ud68c \uc774\uc0c1 \uc870\ud68c\ud574\ub3c4 <code>a == b<\/code> \uac00 \ub418\uc5b4 \ubb38\uc81c\ub418\uc9c0 \uc54a\uc9c0\ub9cc, \ucf54\ub4dc\uac00 \ubcf5\uc7a1\ud574\uc9c0\uba74 <code>a != b<\/code> \uc778 \uc0c1\ud0dc\uac00 \ub418\uace0 \uc608\uc678\ub97c \ubc1c\uc0dd\uc2dc\ud0a8\ub2e4.<\/p>\n<h2>\ud574\uacb0\ucc45<\/h2>\n<p>\uac00\uc7a5 \uc88b\uc740 \ubc29\ubc95\uc740 \ud558\ub098\uc758 \uc5d4\ud130\ud2f0\ub294 \ud55c\ubc88\ub9cc \uc870\ud68c\ud558\ub294\uac83\uc774 \uac00\uc7a5 \uc88b\ub2e4.<\/p>\n<p>\ud558\uc9c0\ub9cc \uadf8\ub807\uac8c \ud558\uc9c0 \ubabb\ud560 \uacbd\uc6b0 \uac04\ub2e8\ud55c \ubc29\ubc95\uc740 \uc544\ub798\uc640 \uac19\uc774 <code>compareTo()<\/code> \ub97c \uad6c\ud604\ud574 \uc8fc\ub294 \uac83\uc774\ub2e4.<\/p>\n<p><strong>\ud558\uc9c0\ub9cc \uc774 \ubc29\ubc95\uc740 <code>JPA<\/code> \uc5d0\uc11c \ubcf4\uc7a5\ud558\ub358 \uc601\uc18d\uc131\uc744 \uc2a4\uc2a4\ub85c \uae68\ub294 \ubc29\ubc95\uc774\uace0, <code>a, b<\/code> \ub450\uac1c\uc758 \uc5d4\ud130\ud2f0\uc5d0 \uc11c\ub85c \ub2e4\ub978 \uc5c5\ub370\uc774\ud2b8\uac00 \ubc1c\uc0dd\ud588\uc744 \ub54c, \uc5b4\ub5a4 \ub0b4\uc6a9\uc774 \uc800\uc7a5\ub418\ub294\uc9c0\ub97c \uc608\uce21\ud560 \uc218 \uc5c6\uc5b4, \uc9c0\uc591\ub418\uc5b4\uc57c \ud560 \ubc29\ubc95\uc785\ub2c8\ub2e4.<\/strong><\/p>\n<pre><code class=\"language-java\">@Setter\n@Getter\n@NoArgsConstructor\n@Entity\n@Table(name = &quot;tbl_ipgo_master&quot;, catalog = &quot;db_storage&quot;)\npublic class IpgoMaster implements Comparable&lt;IpgoMaster&gt; {\n\n    \/\/ ......\n\n    @Override\n    public int compareTo(IpgoMaster o) {\n        if(this == o) return 0;\n        return this.getIpgoId().compareTo(o.getIpgoId());\n    }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>A different object with the same identifier value was already associated with the session \uc6d0\uc778 \ud558\ub098\uc758 \uc138\uc158(\ub7f0\ud0c0\uc784) \ub3d9\uc548 \ub3d9\uc77c\ud55c PK \uc758 \uc5d4\ud130\ud2f0\uac00 \ub450\uac1c \uc774\uc0c1 \uc874\uc7ac\ud560 \ub54c \ubc1c\uc0dd\ud55c\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c\ub294 \ub3d9\uc77c\ud55c PK \uc758 \uc5d4\ud130\ud2f0\ub97c 2\ud68c \uc774\uc0c1 \uc870\ud68c\ud574\ub3c4 a == b \uac00 \ub418\uc5b4 \ubb38\uc81c\ub418\uc9c0 \uc54a\uc9c0\ub9cc, \ucf54\ub4dc\uac00 \ubcf5\uc7a1\ud574\uc9c0\uba74 a != b \uc778 \uc0c1\ud0dc\uac00 \ub418\uace0 \uc608\uc678\ub97c \ubc1c\uc0dd\uc2dc\ud0a8\ub2e4. \ud574\uacb0\ucc45 \uac00\uc7a5 \uc88b\uc740\u2026 <span class=\"read-more\"><a href=\"https:\/\/www.skyer9.pe.kr\/wordpress\/?p=1526\">Read More &raquo;<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,1],"tags":[],"class_list":["post-1526","post","type-post","status-publish","format-standard","hentry","category-spring-boot-2-1","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1526","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1526"}],"version-history":[{"count":3,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1526\/revisions"}],"predecessor-version":[{"id":1530,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1526\/revisions\/1530"}],"wp:attachment":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1526"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1526"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}