{"id":178814,"date":"2024-11-08T21:07:21","date_gmt":"2024-11-08T13:07:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178814\/"},"modified":"2024-11-08T21:07:21","modified_gmt":"2024-11-08T13:07:21","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a23502-not_null_violation%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178814\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a23502 &#8211; not_null_violation\uff1f"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a23502-not_null_violation-AHFtVagZha\">\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a23502 &#8211; not_null_violation<\/h1>\n<p>\u5728\u4f7f\u7528PostgreSQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f23502\u932f\u8aa4\uff0c\u9019\u500b\u932f\u8aa4\u4ee3\u78bc\u8868\u793a\u201cnot null violation\u201d\u3002\u9019\u610f\u5473\u8457\u5728\u63d2\u5165\u6216\u66f4\u65b0\u6578\u64da\u6642\uff0c\u67d0\u500b\u5b57\u6bb5\u88ab\u8a2d\u7f6e\u70ba\u4e0d\u5141\u8a31\u70baNULL\uff0c\u4f46\u5be6\u969b\u4e0a\u537b\u5617\u8a66\u63d2\u5165NULL\u503c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u8b58\u5225\u548c\u4fee\u5fa9\u9019\u4e00\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e7%90%86%e8%a7%a3not-null%e7%b4%84%e6%9d%9f-AHFtVagZha\">\u7406\u89e3not null\u7d04\u675f<\/h2>\n<p>\u5728PostgreSQL\u4e2d\uff0cnot null\u7d04\u675f\u662f\u4e00\u7a2e\u7528\u65bc\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u7684\u7d04\u675f\u3002\u7576\u4e00\u500b\u5b57\u6bb5\u88ab\u8a2d\u7f6e\u70banot null\u6642\uff0c\u9019\u610f\u5473\u8457\u8a72\u5b57\u6bb5\u5728\u6bcf\u4e00\u884c\u4e2d\u90fd\u5fc5\u9808\u6709\u4e00\u500b\u6709\u6548\u7684\u503c\u3002\u9019\u5c0d\u65bc\u67d0\u4e9b\u95dc\u9375\u6578\u64da\uff08\u4f8b\u5982\u7528\u6236\u540d\u3001\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u7b49\uff09\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc23502%e7%9a%84%e5%b8%b8%e8%a6%8b%e6%83%85%e6%b3%81-AHFtVagZha\">\u932f\u8aa4\u4ee3\u78bc23502\u7684\u5e38\u898b\u60c5\u6cc1<\/h2>\n<p>\u7576\u4f60\u5728\u57f7\u884cINSERT\u6216UPDATE\u8a9e\u53e5\u6642\uff0c\u5982\u679c\u67d0\u500bnot null\u5b57\u6bb5\u7684\u503c\u70baNULL\uff0cPostgreSQL\u5c07\u8fd4\u56de\u932f\u8aa4\u4ee3\u78bc23502\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u5728\u63d2\u5165\u65b0\u8a18\u9304\u6642\uff0c\u672a\u63d0\u4f9bnot null\u5b57\u6bb5\u7684\u503c\u3002<\/li>\n<li>\u5728\u66f4\u65b0\u73fe\u6709\u8a18\u9304\u6642\uff0c\u5c07not null\u5b57\u6bb5\u7684\u503c\u8a2d\u7f6e\u70baNULL\u3002<\/li>\n<li>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u968e\u6bb5\uff0c\u672a\u6b63\u78ba\u8a2d\u7f6e\u5b57\u6bb5\u7684\u7d04\u675f\u689d\u4ef6\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9not-null-violation%e9%8c%af%e8%aa%a4-AHFtVagZha\">\u5982\u4f55\u4fee\u5fa9not null violation\u932f\u8aa4<\/h2>\n<p>\u4fee\u5fa9not null violation\u932f\u8aa4\u7684\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5sql%e8%aa%9e%e5%8f%a5-AHFtVagZha\">1. \u6aa2\u67e5SQL\u8a9e\u53e5<\/h3>\n<pre><code>INSERT INTO users (username, email) VALUES (NULL, 'example@example.com');<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0cusername\u5b57\u6bb5\u88ab\u8a2d\u7f6e\u70baNULL\uff0c\u9019\u5c07\u5c0e\u81f423502\u932f\u8aa4\u3002\u78ba\u4fdd\u5728\u63d2\u5165\u6216\u66f4\u65b0\u6642\u63d0\u4f9b\u6240\u6709not null\u5b57\u6bb5\u7684\u6709\u6548\u503c\u3002<\/p>\n<h3 id=\"2-%e6%aa%a2%e6%9f%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b5%90%e6%a7%8b-AHFtVagZha\">2. \u6aa2\u67e5\u6578\u64da\u5eab\u7d50\u69cb<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u6aa2\u67e5\u8868\u7684\u7d50\u69cb\uff0c\u78ba\u4fddnot null\u7d04\u675f\u6b63\u78ba\u8a2d\u7f6e\uff1a<\/p>\n<pre><code>SELECT column_name, is_nullable \nFROM information_schema.columns \nWHERE table_name = 'users';<\/code><\/pre>\n<p>\u9019\u5c07\u986f\u793ausers\u8868\u4e2d\u6bcf\u500b\u5b57\u6bb5\u7684\u53ef\u7a7a\u6027\u3002\u5982\u679c\u67d0\u500b\u5b57\u6bb5\u61c9\u8a72\u662fnot null\uff0c\u4f46\u986f\u793a\u70ba\u53ef\u7a7a\uff0c\u5247\u9700\u8981\u4fee\u6539\u8868\u7d50\u69cb\u3002<\/p>\n<h3 id=\"3-%e4%bf%ae%e6%94%b9%e8%a1%a8%e7%b5%90%e6%a7%8b-AHFtVagZha\">3. \u4fee\u6539\u8868\u7d50\u69cb<\/h3>\n<p>\u5982\u679c\u9700\u8981\u66f4\u6539\u5b57\u6bb5\u7684\u7d04\u675f\uff0c\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u3002\u4f8b\u5982\uff0c\u5c07username\u5b57\u6bb5\u8a2d\u7f6e\u70banot null\uff1a<\/p>\n<pre><code>ALTER TABLE users \nALTER COLUMN username SET NOT NULL;<\/code><\/pre>\n<h3 id=\"4-%e8%99%95%e7%90%86%e7%8f%be%e6%9c%89%e6%95%b8%e6%93%9a-AHFtVagZha\">4. \u8655\u7406\u73fe\u6709\u6578\u64da<\/h3>\n<p>\u5982\u679c\u8868\u4e2d\u5df2\u7d93\u5b58\u5728NULL\u503c\uff0c\u5247\u5728\u8a2d\u7f6enot null\u7d04\u675f\u4e4b\u524d\uff0c\u5fc5\u9808\u5148\u8655\u7406\u9019\u4e9b\u6578\u64da\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u67e5\u627eNULL\u503c\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE username IS NULL;<\/code><\/pre>\n<p>\u7136\u5f8c\uff0c\u6839\u64da\u696d\u52d9\u9700\u6c42\u66f4\u65b0\u9019\u4e9b\u8a18\u9304\uff0c\u78ba\u4fdd\u6240\u6709not null\u5b57\u6bb5\u90fd\u6709\u6709\u6548\u503c\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-AHFtVagZha\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u7684\u932f\u8aa4\u4ee3\u78bc23502 &#8211; not null violation\u901a\u5e38\u662f\u7531\u65bc\u672a\u63d0\u4f9bnot null\u5b57\u6bb5\u7684\u503c\u800c\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5SQL\u8a9e\u53e5\u3001\u6578\u64da\u5eab\u7d50\u69cb\u4ee5\u53ca\u73fe\u6709\u6578\u64da\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u8b58\u5225\u548c\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u78ba\u4fdd\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\u5408\u7406\u8a2d\u7f6e\u7d04\u675f\u689d\u4ef6\uff0c\u4ee5\u907f\u514d\u672a\u4f86\u51fa\u73fe\u985e\u4f3c\u554f\u984c\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u7db2\u7ad9\u6258\u7ba1\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc23502 &#8211; not_null_violation\uff0c\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\uff0c\u907f\u514d\u7a7a\u503c\u554f\u984c\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-178814","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178814","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=178814"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178814\/revisions"}],"predecessor-version":[{"id":178815,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178814\/revisions\/178815"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178814"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178814"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178814"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}