{"id":41671,"date":"2023-09-06T17:51:08","date_gmt":"2023-12-26T00:35:39","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/grails%e5%85%b3%e4%ba%8epostgresql%e7%9a%84%e5%ba%8f%e5%88%97%e8%af%b4%e6%98%8e\/"},"modified":"2024-04-30T21:46:44","modified_gmt":"2024-04-30T13:46:44","slug":"grails%e5%85%b3%e4%ba%8epostgresql%e7%9a%84%e5%ba%8f%e5%88%97%e8%af%b4%e6%98%8e","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/grails%e5%85%b3%e4%ba%8epostgresql%e7%9a%84%e5%ba%8f%e5%88%97%e8%af%b4%e6%98%8e\/","title":{"rendered":"[Grails]\u5173\u4e8ePostgreSQL\u7684\u5e8f\u5217\u8bf4\u660e"},"content":{"rendered":"<p>\u8bf7\u53c2\u8003\u4ee5\u4e0b\u94fe\u63a5\uff1a<br \/>\n<iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" title=\"Grails\u306eGORM\u3068ID\u7ba1\u7406\u3068PostgreSQL\u306e\u30b7\u30fc\u30b1\u30f3\u30b9 - \u8c46\u7121\u65e5\u8a18\" src=\"https:\/\/hatenablog-parts.com\/embed?url=http%3A%2F%2Fnobeans.hatenablog.com%2Fentry%2F20091030%2F1256896937#?secret=eAsl3ODl9j\" data-secret=\"eAsl3ODl9j\" scrolling=\"no\" frameborder=\"0\"><\/iframe><br \/>\nhttp:\/\/stackoverflow.com\/questions\/2822623\/how-to-set-up-an-insert-to-a-grails-created-file-with-next-sequence-number<\/p>\n<p>\u5982\u679c\u5728Grails\u4e2d\u4f7f\u7528PostgreSQL\uff0c\u6839\u636e\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4e0d\u4f1a\u4f7f\u7528PostgreSQL\u7684sequence\u3002\u901a\u8fc7\u6309\u7167\u4e0b\u9762\u7684\u65b9\u5f0f\uff0c\u5728\u6bcf\u4e2a\u57df\u4e2d\u5b9a\u4e49\u81ea\u5df1\u7684sequence\u53ef\u4ee5\u5b9e\u73b0\u4f7f\u7528\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kn\">package<\/span> <span class=\"nn\">hoge<\/span>\r\n\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">Test<\/span><span class=\"o\">{<\/span>\r\n\r\n    <span class=\"n\">String<\/span> <span class=\"n\">word<\/span>\r\n    <span class=\"kd\">static<\/span> <span class=\"n\">constraints<\/span> <span class=\"o\">=<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"o\">}<\/span>\r\n    <span class=\"kd\">static<\/span> <span class=\"n\">mapping<\/span> <span class=\"o\">=<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"n\">id<\/span> <span class=\"nl\">generator:<\/span><span class=\"s1\">'sequence'<\/span><span class=\"o\">,<\/span> <span class=\"nl\">params:<\/span> <span class=\"o\">[<\/span><span class=\"nl\">sequence:<\/span><span class=\"s1\">'test_id_seq'<\/span><span class=\"o\">]<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u7136\u800c\uff0c\u8fd9\u79cd\u65b9\u5f0f\u5b9e\u9645\u4e0a\u5b58\u5728\u9677\u9631\uff0c\u5f53Grails\u5904\u4e8eCreateDrop\u6a21\u5f0f\u65f6\uff0c\u5b83\u4f1a\u81ea\u52a8\u521b\u5efa\u5305\u62ec\u4e0a\u8ff0\u5e8f\u5217\u5728\u5185\u7684\u6240\u6709\u8868\uff0c\u4f46\u662f\u8868\u7684id\u5c5e\u6027\u6ca1\u6709\u6307\u5b9a\u4e3a\u8be5\u5e8f\u5217\u7684nextval\u3002<br \/>\n\u56e0\u6b64\uff0c\u5982\u679c\u5728\u539f\u59cb\u7684SQL\u4e2d\u7701\u7565id\uff0c\u90a3\u4e48id\u4e0d\u80fd\u4e3anull\uff01\u8fd9\u662f\u7406\u6240\u5f53\u7136\u7684\u9519\u8bef\u3002<\/p>\n<p>\u5728Grails\u4e2d\u6839\u636e\u4ee5\u4e0b\u6761\u4ef6\u81ea\u52a8\u751f\u6210\u7684\u8868\u5b9a\u4e49\u662f\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">-- \u3053\u3063\u3061\u304c\u30c6\u30fc\u30d6\u30eb<\/span>\r\n<span class=\"n\">mydb<\/span><span class=\"o\">=#<\/span> <span class=\"err\">\\<\/span><span class=\"n\">d<\/span> <span class=\"n\">test<\/span>\r\n     <span class=\"n\">Tabelle<\/span> <span class=\"k\">public<\/span><span class=\"p\">.<\/span><span class=\"n\">test<\/span>\r\n <span class=\"n\">Spalte<\/span>  <span class=\"o\">|<\/span>          <span class=\"n\">Typ<\/span>           <span class=\"o\">|<\/span> <span class=\"n\">Attribute<\/span>\r\n<span class=\"c1\">---------+------------------------+-----------<\/span>\r\n <span class=\"n\">id<\/span>      <span class=\"o\">|<\/span> <span class=\"nb\">bigint<\/span>                 <span class=\"o\">|<\/span> <span class=\"k\">not<\/span> <span class=\"k\">null<\/span>\r\n <span class=\"k\">version<\/span> <span class=\"o\">|<\/span> <span class=\"nb\">bigint<\/span>                 <span class=\"o\">|<\/span> <span class=\"k\">not<\/span> <span class=\"k\">null<\/span>\r\n <span class=\"n\">word<\/span>    <span class=\"o\">|<\/span> <span class=\"nb\">character<\/span> <span class=\"nb\">varying<\/span><span class=\"p\">(<\/span><span class=\"mi\">255<\/span><span class=\"p\">)<\/span> <span class=\"o\">|<\/span> <span class=\"k\">not<\/span> <span class=\"k\">null<\/span>\r\n<span class=\"n\">Indexe<\/span><span class=\"p\">:<\/span>\r\n    <span class=\"nv\">\"test_pkey\"<\/span> <span class=\"k\">PRIMARY<\/span> <span class=\"k\">KEY<\/span><span class=\"p\">,<\/span> <span class=\"n\">btree<\/span> <span class=\"p\">(<\/span><span class=\"n\">id<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"c1\">-- \u3053\u3063\u3061\u304csequence<\/span>\r\n<span class=\"n\">mydb<\/span><span class=\"o\">=#<\/span> <span class=\"err\">\\<\/span><span class=\"n\">d<\/span> <span class=\"n\">test_id_seq<\/span>\r\n     <span class=\"n\">Sequenz<\/span> <span class=\"k\">public<\/span><span class=\"p\">.<\/span><span class=\"n\">test_id_seq<\/span>\r\n    <span class=\"n\">Spalte<\/span>     <span class=\"o\">|<\/span>   <span class=\"n\">Typ<\/span>   <span class=\"o\">|<\/span>           <span class=\"n\">Wert<\/span>\r\n<span class=\"c1\">---------------+---------+---------------------------<\/span>\r\n <span class=\"n\">sequence_name<\/span> <span class=\"o\">|<\/span> <span class=\"n\">name<\/span>    <span class=\"o\">|<\/span> <span class=\"n\">test_id_seq<\/span>\r\n <span class=\"n\">last_value<\/span>    <span class=\"o\">|<\/span> <span class=\"nb\">bigint<\/span>  <span class=\"o\">|<\/span> <span class=\"mi\">4<\/span>\r\n <span class=\"n\">start_value<\/span>   <span class=\"o\">|<\/span> <span class=\"nb\">bigint<\/span>  <span class=\"o\">|<\/span> <span class=\"mi\">1<\/span>\r\n <span class=\"n\">increment_by<\/span>  <span class=\"o\">|<\/span> <span class=\"nb\">bigint<\/span>  <span class=\"o\">|<\/span> <span class=\"mi\">1<\/span>\r\n <span class=\"n\">max_value<\/span>     <span class=\"o\">|<\/span> <span class=\"nb\">bigint<\/span>  <span class=\"o\">|<\/span> <span class=\"mi\">9223372036854775807<\/span>\r\n <span class=\"n\">min_value<\/span>     <span class=\"o\">|<\/span> <span class=\"nb\">bigint<\/span>  <span class=\"o\">|<\/span> <span class=\"mi\">1<\/span>\r\n <span class=\"n\">cache_value<\/span>   <span class=\"o\">|<\/span> <span class=\"nb\">bigint<\/span>  <span class=\"o\">|<\/span> <span class=\"mi\">1<\/span>\r\n <span class=\"n\">log_cnt<\/span>       <span class=\"o\">|<\/span> <span class=\"nb\">bigint<\/span>  <span class=\"o\">|<\/span> <span class=\"mi\">32<\/span>\r\n <span class=\"n\">is_cycled<\/span>     <span class=\"o\">|<\/span> <span class=\"nb\">boolean<\/span> <span class=\"o\">|<\/span> <span class=\"n\">f<\/span>\r\n <span class=\"n\">is_called<\/span>     <span class=\"o\">|<\/span> <span class=\"nb\">boolean<\/span> <span class=\"o\">|<\/span> <span class=\"n\">t<\/span>\r\n<\/code><\/pre>\n<p>\u7531\u4e8e\u672a\u5bf9id\u7684Attribute\u6307\u5b9anextval\uff0c\u56e0\u6b64\u4ee5\u4e0b\u7684SQL\u5c06\u62a5\u9519\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">INSERT<\/span> <span class=\"k\">INTO<\/span> <span class=\"n\">test<\/span> <span class=\"p\">(<\/span><span class=\"k\">version<\/span><span class=\"p\">,<\/span><span class=\"n\">word<\/span><span class=\"p\">)<\/span> <span class=\"k\">VALUES<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"s1\">'aaa'<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>Grails\u81ea\u8eab\u77e5\u9053\u5728\u57df\u4e2d\u6307\u5b9a\u7684sequence\u4fe1\u606f\uff0c\u56e0\u6b64\u53ef\u4ee5\u4f7f\u7528\u751f\u6210\u7684sequence\u3002\u7136\u800c\uff0cPostgreSQL\u672c\u8eab\u65e0\u6cd5\u81ea\u52a8\u4f7f\u7528sequence\uff0c\u56e0\u4e3a\u5982\u4e0a\u9762\u7684\u8868\u5b9a\u4e49\u6240\u793a\uff0ctest\u8868\u7684id\u5bf9\u5e94\u7684sequence\u4fe1\u606f\u6ca1\u6709\u4efb\u4f55\u5730\u65b9\u5199\u660e\uff0c\u6240\u4ee5\u5728INSERT\u65f6\u5982\u679c\u7701\u7565id\uff0c\u65e0\u6cd5\u81ea\u52a8\u4f7f\u7528sequence\u3002<\/p>\n<p>\u9700\u8981\u539f\u672c\u7684\u8868\u5b9a\u4e49\u5982\u4e0b\u3002\u5982\u679c\u7701\u7565 id \uff0cPostgreSQL \u5c06\u81ea\u52a8\u4f7f\u7528 nextval \u6307\u5b9a\u7684\u5e8f\u5217\u3002<\/p>\n<pre class=\"post-pre\"><code>                          Tabelle public.test2\r\n Spalte |   Typ   |                       Attribute\r\n--------+---------+--------------------------------------------------------\r\n id     | integer | not null Vorgabewert nextval('test2_id_seq'::regclass)\r\n name   | text    |\r\n\r\n<\/code><\/pre>\n<p>\u4f7f\u7528Grails\u63d0\u4f9b\u7684\u529f\u80fd\u6765\u4f7f\u7528\u6570\u636e\u5e93\uff0c\u65e0\u8bba\u662f\u4f7f\u7528sequence\u8fd8\u662f\u5176\u4ed6\u65b9\u6cd5\uff0c\u5e76\u6ca1\u6709\u4ec0\u4e48\u7279\u522b\u95ee\u9898\u3002<br \/>\n\u95ee\u9898\u51fa\u73b0\u5728\u5f53\u81ea\u5df1\u7f16\u5199\u5e76\u6267\u884cSQL\u7684INSERT\u8bed\u53e5\u65f6\u3002<\/p>\n<p>\u4f5c\u4e3a\u5bf9\u7b56\uff0c\u6709\u4ee5\u4e0b2\u70b9\uff1a<br \/>\n1. \u624b\u52a8\u751f\u6210\u6240\u6709\u7684\u8868\u548c\u5e8f\u5217\uff0c\u6216\u8005\u540e\u7eed\u6dfb\u52a0nextval\u3002<br \/>\n2. \u5728\u76f4\u63a5\u6267\u884cSQL\u65f6\uff0c\u8981\u786e\u4fdd\u6b63\u786e\u6307\u5b9aid\u3002<\/p>\n<p>\u7b2c\u4e8c\u79cd\u60c5\u51b5\u4f1a\u53d8\u6210\u4ee5\u4e0b\u7684\u6837\u5b50\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kt\">def<\/span> <span class=\"n\">query<\/span> <span class=\"o\">=<\/span> <span class=\"s2\">\"INSERT INTO test (id,version,word) VALUES(nextval('test_id_seq'),?,?)\"<\/span>\r\n<span class=\"n\">sql<\/span><span class=\"o\">.<\/span><span class=\"na\">executeInsert<\/span><span class=\"o\">(<\/span><span class=\"n\">query<\/span><span class=\"o\">,<\/span> <span class=\"o\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span><span class=\"s2\">\"test-data-a\"<\/span><span class=\"o\">])<\/span>\r\n<\/code><\/pre>\n<p>\u987a\u4fbf\u8bf4\u4e00\u4e0b\uff0c\u5728\u8fd9\u9879\u670d\u52a1\u4e2d\uff0c\u53ef\u4ee5\u76f4\u63a5\u6267\u884cSQL\u5e76\u987a\u5229\u8fdb\u884c\u56de\u6eda\u64cd\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8bf7\u53c2\u8003\u4ee5\u4e0b\u94fe\u63a5\uff1a http:\/\/stackoverflow.com\/questions\/2822623\/how [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-41671","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Grails]\u5173\u4e8ePostgreSQL\u7684\u5e8f\u5217\u8bf4\u660e - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/grails\u5173\u4e8epostgresql\u7684\u5e8f\u5217\u8bf4\u660e\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Grails]\u5173\u4e8ePostgreSQL\u7684\u5e8f\u5217\u8bf4\u660e\" \/>\n<meta property=\"og:description\" content=\"\u8bf7\u53c2\u8003\u4ee5\u4e0b\u94fe\u63a5\uff1a http:\/\/stackoverflow.com\/questions\/2822623\/how [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/grails\u5173\u4e8epostgresql\u7684\u5e8f\u5217\u8bf4\u660e\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-12-26T00:35:39+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-30T13:46:44+00:00\" \/>\n<meta name=\"author\" content=\"\u6587, \u7fd4\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6587, \u7fd4\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 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