{"id":21346,"date":"2024-01-02T07:51:26","date_gmt":"2024-01-02T07:51:26","guid":{"rendered":"https:\/\/server.hk\/blog\/21346\/"},"modified":"2024-11-14T10:36:18","modified_gmt":"2024-11-14T02:36:18","slug":"how-to-fix-postgresql-error-code-23505-unique_violation","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21346\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a23505 &#8211; unique_violation"},"content":{"rendered":"<h1 id=\"how-to-fix-postgresql-error-code-23505-unique_violation-waJKtItmEB\">\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a23505 &#8211; unique_violation<\/h1>\n<p>PostgreSQL \u662f\u4e00\u6b3e\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u5f0f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5f0f\u3002\u7136\u800c\uff0c\u8207\u5176\u4ed6\u8edf\u9ad4\u4e00\u6a23\uff0c\u5b83\u4e5f\u7121\u6cd5\u907f\u514d\u932f\u8aa4\u7684\u767c\u751f\u3002\u5176\u4e2d\u4e00\u500b\u5e38\u898b\u7684\u932f\u8aa4\u662f PostgreSQL \u4f7f\u7528\u8005\u53ef\u80fd\u9047\u5230\u7684 unique_violation \u932f\u8aa4\uff0c\u5c0d\u61c9\u932f\u8aa4\u4ee3\u78bc\u70ba 23505\u3002\u9019\u500b\u932f\u8aa4\u767c\u751f\u5728\u9055\u53cd\u552f\u4e00\u7d04\u675f\uff08unique constraint\uff09\u6642\uff0c\u610f\u5473\u8457\u5617\u8a66\u63d2\u5165\u6216\u66f4\u65b0\u4e00\u689d\u8a18\u9304\u6642\uff0c\u5176\u503c\u5728\u5df2\u5177\u6709\u552f\u4e00\u7d04\u675f\u7684\u6b04\u4f4d\u4e2d\u5df2\u7d93\u5b58\u5728\u3002<\/p>\n<h2 id=\"understanding-the-unique_violation-error-waJKtItmEB\">\u7406\u89e3 unique_violation \u932f\u8aa4<\/h2>\n<p>\u7576\u60a8\u5728 PostgreSQL \u4e2d\u9047\u5230 unique_violation \u932f\u8aa4\u6642\uff0c\u8868\u793a\u60a8\u6b63\u5617\u8a66\u63d2\u5165\u6216\u66f4\u65b0\u4e00\u689d\u9055\u53cd\u552f\u4e00\u7d04\u675f\u7684\u8a18\u9304\u3002\u552f\u4e00\u7d04\u675f\u78ba\u4fdd\u6bcf\u500b\u6b04\u4f4d\u4e2d\u7684\u503c\u662f\u552f\u4e00\u7684\uff0c\u5f9e\u800c\u9632\u6b62\u91cd\u8907\u7684\u689d\u76ee\u3002\u6b64\u932f\u8aa4\u53ef\u80fd\u7531\u591a\u7a2e\u539f\u56e0\u9020\u6210\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u5617\u8a66\u63d2\u5165\u4e00\u689d\u5728\u5177\u6709\u552f\u4e00\u7d04\u675f\u7684\u6b04\u4f4d\u4e2d\u5df2\u5b58\u5728\u7684\u503c\u7684\u8a18\u9304\u3002<\/li>\n<li>\u7528\u4e00\u500b\u8207\u5177\u6709\u552f\u4e00\u7d04\u675f\u7684\u6b04\u4f4d\u4e2d\u73fe\u6709\u503c\u885d\u7a81\u7684\u503c\u4f86\u66f4\u65b0\u4e00\u689d\u8a18\u9304\u3002<\/li>\n<li>\u4e26\u767c\u554f\u984c\uff0c\u7576\u591a\u500b\u4ea4\u6613\u5617\u8a66\u540c\u6642\u63d2\u5165\u6216\u66f4\u65b0\u5177\u6709\u885d\u7a81\u503c\u7684\u8a18\u9304\u3002<\/li>\n<\/ul>\n<h2 id=\"resolving-the-unique_violation-error-waJKtItmEB\">\u89e3\u6c7a unique_violation \u932f\u8aa4<\/h2>\n<p>\u9762\u5c0d unique_violation \u932f\u8aa4\u6642\uff0c\u60a8\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\u4f86\u89e3\u6c7a\u5b83\uff1a<\/p>\n<h3 id=\"1-identify-the-affected-table-and-column-waJKtItmEB\">1. \u78ba\u8a8d\u53d7\u5f71\u97ff\u7684\u8868\u683c\u548c\u6b04\u4f4d<\/h3>\n<p>\u7b2c\u4e00\u6b65\u662f\u627e\u51fa\u5f15\u8d77 unique_violation \u932f\u8aa4\u7684\u8868\u683c\u548c\u6b04\u4f4d\u3002\u932f\u8aa4\u4fe1\u606f\u901a\u5e38\u6703\u63d0\u4f9b\u9019\u4e9b\u8cc7\u8a0a\u3002\u8209\u4f8b\u4f86\u8aaa\uff1a<\/p>\n<pre><code>ERROR:  duplicate key value violates unique constraint \"table_column_key\"\r\nDETAIL:  Key (column)=(value) already exists.\r\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u201ctable_column_key\u201d\u6307\u7684\u662f\u552f\u4e00\u7d04\u675f\u7684\u540d\u7a31\uff0c\u201ccolumn\u201d\u6307\u7684\u662f\u5177\u6709\u552f\u4e00\u7d04\u675f\u7684\u6b04\u4f4d\uff0c\u800c\u201cvalue\u201d\u5247\u6307\u7684\u662f\u5df2\u5b58\u5728\u7684\u503c\u3002<\/p>\n<h3 id=\"2-check-existing-data-waJKtItmEB\">2. \u6aa2\u67e5\u73fe\u6709\u6578\u64da<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u60a8\u61c9\u8a72\u6aa2\u67e5\u53d7\u5f71\u97ff\u7684\u8868\u683c\u548c\u6b04\u4f4d\u4e2d\u7684\u73fe\u6709\u6578\u64da\uff0c\u4ee5\u78ba\u4fdd\u6c92\u6709\u91cd\u8907\u7684\u503c\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528 SQL \u67e5\u8a62\u4f86\u8b58\u5225\u4efb\u4f55\u885d\u7a81\u7684\u8a18\u9304\u3002\u8209\u4f8b\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column FROM table WHERE column = 'value';\r\n<\/code><\/pre>\n<p>\u5982\u679c\u67e5\u8a62\u8fd4\u56de\u4efb\u4f55\u7d50\u679c\uff0c\u9019\u610f\u5473\u8457\u8a72\u6b04\u4f4d\u4e2d\u5b58\u5728\u91cd\u8907\u7684\u503c\u3002\u60a8\u53ef\u4ee5\u7136\u5f8c\u6c7a\u5b9a\u5982\u4f55\u8655\u7406\u9019\u4e9b\u91cd\u8907\uff0c\u5982\u522a\u9664\u6216\u66f4\u65b0\u885d\u7a81\u7684\u8a18\u9304\u3002<\/p>\n<h3 id=\"3-modify-the-data-waJKtItmEB\">3. \u4fee\u6539\u6578\u64da<\/h3>\n<p>\u5982\u679c\u60a8\u5df2\u8b58\u5225\u51fa\u885d\u7a81\u7684\u8a18\u9304\uff0c\u60a8\u53ef\u4ee5\u4fee\u6539\u6578\u64da\u4ee5\u89e3\u6c7a unique_violation \u932f\u8aa4\u3002\u9019\u53ef\u80fd\u6d89\u53ca\u66f4\u65b0\u73fe\u6709\u8a18\u9304\u6216\u522a\u9664\u5b83\u5011\uff0c\u5177\u9ad4\u53d6\u6c7a\u65bc\u60a8\u7684\u9700\u6c42\u3002<\/p>\n<h3 id=\"4-adjust-constraints-waJKtItmEB\">4. \u8abf\u6574\u7d04\u675f\u689d\u4ef6<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u8abf\u6574\u552f\u4e00\u7d04\u675f\u4ee5\u5bb9\u8a31\u6240\u9700\u6578\u64da\u3002\u9019\u53ef\u80fd\u6d89\u53ca\u4fee\u6539\u7d04\u675f\u672c\u8eab\u6216\u5b8c\u5168\u522a\u9664\u5b83\u3002\u4e0d\u904e\uff0c\u522a\u9664\u7d04\u675f\u6642\u61c9\u8a72\u8b39\u614e\uff0c\u56e0\u70ba\u5b83\u5011\u5728\u7dad\u8b77\u6578\u64da\u5b8c\u6574\u6027\u65b9\u9762\u767c\u63ee\u4e86\u91cd\u8981\u4f5c\u7528\u3002<\/p>\n<h3 id=\"5-handle-concurrency-issues-waJKtItmEB\">5. \u8655\u7406\u4e26\u767c\u554f\u984c<\/h3>\n<p>\u5982\u679c unique_violation \u932f\u8aa4\u662f\u7531\u65bc\u4e26\u767c\u554f\u984c\u9020\u6210\u7684\uff0c\u5373\u591a\u500b\u4ea4\u6613\u5617\u8a66\u540c\u6642\u63d2\u5165\u6216\u66f4\u65b0\u885d\u7a81\u503c\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u5be6\u65bd\u4e26\u767c\u63a7\u5236\u6a5f\u5236\u3002\u9019\u53ef\u80fd\u5305\u62ec\u4f7f\u7528\u9396\u3001\u4ea4\u6613\u6216\u5176\u4ed6\u6280\u8853\uff0c\u4ee5\u78ba\u4fdd\u885d\u7a81\u64cd\u4f5c\u4e0d\u6703\u540c\u6642\u767c\u751f\u3002<\/p>\n<h2 id=\"summary-waJKtItmEB\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL \u4e2d\u7684 unique_violation \u932f\u8aa4\u4ee3\u78bc 23505 \u767c\u751f\u5728\u9055\u53cd\u552f\u4e00\u7d04\u675f\u6642\u3002\u8981\u4fee\u5fa9\u6b64\u932f\u8aa4\uff0c\u60a8\u9700\u8981\u78ba\u8a8d\u53d7\u5f71\u97ff\u7684\u8868\u683c\u548c\u6b04\u4f4d\uff0c\u6aa2\u67e5\u73fe\u6709\u7684\u91cd\u8907\u6578\u64da\uff0c\u5728\u5fc5\u8981\u6642\u4fee\u6539\u6578\u64da\uff0c\u8abf\u6574\u7d04\u675f\uff0c\u4e26\u8655\u7406\u4e26\u767c\u554f\u984c\u3002\u901a\u904e\u9075\u5faa\u9019\u4e9b\u6b65\u9a5f\uff0c\u60a8\u53ef\u4ee5\u89e3\u6c7a unique_violation \u932f\u8aa4\uff0c\u78ba\u4fdd\u60a8\u7684 PostgreSQL \u6578\u64da\u5eab\u7684\u5b8c\u6574\u6027\u3002<\/p>\n<p>\u5982\u9700\u53ef\u9760\u4e14\u9ad8\u6548\u80fd\u7684 VPS \u8a17\u7ba1\u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8003\u616e <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002\u901a\u904e\u6211\u5011\u9802\u5c16\u7684 VPS \u8a17\u7ba1\u670d\u52d9\uff0c\u60a8\u53ef\u4ee5\u9ad4\u9a57\u5230\u865b\u64ec\u79c1\u4eba\u4f3a\u670d\u5668\u5728 PostgreSQL \u53ca\u5176\u4ed6\u6578\u64da\u5eab\u9700\u6c42\u4e0a\u7684\u5f37\u5927\u8207\u9748\u6d3b\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u4fee\u5fa9 PostgreSQL &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-21346","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21346","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=21346"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21346\/revisions"}],"predecessor-version":[{"id":24151,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21346\/revisions\/24151"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}