{"id":43238,"date":"2024-12-01T11:35:06","date_gmt":"2024-12-01T03:35:06","guid":{"rendered":"https:\/\/fwq.ai\/blog\/43238\/"},"modified":"2024-12-01T11:35:06","modified_gmt":"2024-12-01T03:35:06","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8%e8%bf%9e%e6%8e%a5%e5%85%b3%e9%97%ad%e6%97%b6%e7%bb%88%e6%ad%a2%e6%ad%a3%e5%9c%a8%e8%bf%90%e8%a1%8c%e7%9a%84%e6%9f%a5%e8%af%a2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/43238\/","title":{"rendered":"\u5982\u4f55\u5728\u8fde\u63a5\u5173\u95ed\u65f6\u7ec8\u6b62\u6b63\u5728\u8fd0\u884c\u7684\u67e5\u8be2"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u5728\u8fde\u63a5\u5173\u95ed\u65f6\u7ec8\u6b62\u6b63\u5728\u8fd0\u884c\u7684\u67e5\u8be2<\/span><\/p>\n

\u5982\u4f55\u5728\u8fde\u63a5\u5173\u95ed\u65f6\u7ec8\u6b62\u6b63\u5728\u8fd0\u884c\u7684\u67e5\u8be2<\/h1>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-05-01 10:00:37<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u76ee\u524d\u7c73\u4e91\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u5173\u4e8eGolang<\/span>\u7684\u6587\u7ae0\u4e86\uff0c\u81ea\u5df1\u5728\u521d\u6b21\u9605\u8bfb\u8fd9\u4e9b\u6587\u7ae0\u4e2d\uff0c\u4e5f\u89c1\u8bc6\u5230\u4e86\u5f88\u591a\u5b66\u4e60\u601d\u8def\uff1b\u90a3\u4e48\u672c\u6587\u300a\u5982\u4f55\u5728\u8fde\u63a5\u5173\u95ed\u65f6\u7ec8\u6b62\u6b63\u5728\u8fd0\u884c\u7684\u67e5\u8be2\u300b<\/span>\uff0c\u4e5f\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u5982\u679c\u9605\u8bfb\u5b8c\u540e\u771f\u7684\u5bf9\u4f60\u5b66\u4e60Golang<\/span>\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u52a8\u52a8\u624b\u6307\uff0c\u8bc4\u8bba\u7559\u8a00\u5e76\u5206\u4eab~<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u4eec\u5728\u540e\u7aef\u4f7f\u7528 https:\/\/github.com\/go-gorm\/gorm\/ ORM \u548c\u811a\u672c\u6765\u8fde\u63a5\u5230\u6211\u4eec\u7684 PostgreSQL \u6570\u636e\u5e93\u3002<\/p>\n

\u6709\u65f6\uff0c\u5f53\u811a\u672c\u6b63\u5728\u8fdb\u884c\u65f6\uff0c\u6211\u4eec\u4f1a\u901a\u8fc7\u5728\u672c\u5730\u6309 Ctrl + C<\/code> \u6216\u5728\u751f\u4ea7\u4e2d\u7ec8\u6b62 pod\/\u8fdb\u7a0b\u6765\u624b\u52a8\u7ec8\u6b62\u4f5c\u4e1a\u3002\u6211\u4eec\u5728\u6240\u6709\u811a\u672c\u4e2d\u786e\u5b9e\u6709\u4e00\u4e2a defer DB.Close()<\/code>\uff0c\u6211\u8fd8\u6dfb\u52a0\u4e86\u5904\u7406 SIGINT \/ SIGTERM \u4fe1\u53f7\u4ee5\u5728\u7ec8\u6b62\u65f6\u6267\u884c DB.Close()<\/code> \u3002<\/p>\n

\u95ee\u9898\u662f\uff0c\u5373\u4f7f\u5173\u95ed\u8fde\u63a5\u540e\uff0c\u4efb\u4f55\u5df2\u7ecf\u8fd0\u884c\u7684\u73b0\u6709\u67e5\u8be2\u4e5f\u4e0d\u4f1a\u88ab\u7ec8\u6b62\u5e76\u7ee7\u7eed\u5360\u7528\u6570\u636e\u5e93\u8d44\u6e90\u3002\u6709\u6ca1\u6709\u529e\u6cd5\u5728\u76f4\u63a5\u4ece gorm \u6216\u901a\u8fc7\u5176\u4ed6\u4e00\u4e9b hack \u9000\u51fa\u4e4b\u524d\u7ec8\u6b62\u6b64\u8fde\u63a5\u6c60\u542f\u52a8\u7684\u4efb\u4f55\u67e5\u8be2\u3002<\/p>\n

\u8003\u8651\u4f7f\u7528 pg_backend_pid()<\/code> \u5e76\u4f7f\u7528 pg_stat_activity<\/code> \u7ec8\u6b62\u67e5\u8be2\uff0c\u4f46\u662f\u6211\u4eec\u5728\u8fd0\u884c\u65b0\u7684 pg_backend_pid()<\/code> \u65f6\u83b7\u5f97\u7684 pid \u5c06\u4e0e\u6b63\u5728\u8fd0\u884c\u7684\u4e0d\u4e00\u6837\u3002<\/p>\n

\u7248\u672c<\/strong>\uff1ajinzhu\/gorm v1.9.2<\/code><\/p>\n

<\/p>\n

\u89e3\u51b3\u65b9\u6848<\/h2>\n

<\/p>\n

\u60a8\u53ef\u4ee5\u4f7f\u7528 begintx(ctx context.context, opts *sql.txoptions)<\/code> \uff0c\u5b83\u5c06\u4e0a\u4e0b\u6587\u4f5c\u4e3a\u53c2\u6570\u3002<\/p>\n

\u8fd9\u662f\u4e00\u4e2a\u5c0f\u4f8b\u5b50\uff1a<\/p>\n

import (\n    \"context\"\n    \"fmt\"\n    \"os\"\n    \"os\/signal\"\n\n    \"github.com\/jinzhu\/gorm\"\n    _ \"github.com\/jinzhu\/gorm\/dialects\/postgres\"\n)\n\nfunc main() {\n    db, err := gorm.Open(\"postgres\", \"host=localhost port=5432 user=gorm dbname=gorm password=mypassword sslmode=disable\")\n    if err != nil {\n        panic(err)\n    }\n    defer db.Close()\n    ctx := context.Background()\n\n    ctx, cancel := context.WithCancel(ctx)\n    c := make(chan os.Signal, 1)\n    signal.Notify(c, os.Interrupt)\n    defer func() {\n        signal.Stop(c)\n        cancel()\n    }()\n    go func() {\n        select {\n        case <-c:\n            cancel()\n        case <-ctx.Done():\n        }\n    }()\n\n    transaction, err := db.DB().BeginTx(ctx, nil)\n    _, err = transaction.Exec(\"SELECT pg_sleep(100)\")\n    if err != nil {\n        fmt.Println(err.Error())\n    }\n}<\/pre>\n
\u672c\u7bc7\u5173\u4e8e\u300a\u5982\u4f55\u5728\u8fde\u63a5\u5173\u95ed\u65f6\u7ec8\u6b62\u6b63\u5728\u8fd0\u884c\u7684\u67e5\u8be2\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8eGolang\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > > > \u5982\u4f55\u5728\u8fde\u63a5\u5173\u95ed\u65f6\u7ec8\u6b62\u6b63\u5728\u8fd0\u884c\u7684\u67e5\u8be2 \u5982\u4f55\u5728\u8fde\u63a5\u5173\u95ed\u65f6\u7ec8\u6b62\u6b63\u5728\u8fd0\u884c\u7684\u67e5\u8be2 \u6765\u6e90\uff1astackoverflow 2024-05-01 10:00:37 0\u6d4f\u89c8 \u6536\u85cf \u76ee\u524d\u7c73\u4e91\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u5173\u4e8eGolang\u7684\u6587\u7ae0\u4e86\uff0c\u81ea\u5df1\u5728\u521d\u6b21\u9605\u8bfb\u8fd9\u4e9b\u6587\u7ae0\u4e2d\uff0c\u4e5f\u89c1\u8bc6\u5230\u4e86\u5f88\u591a\u5b66\u4e60\u601d\u8def\uff1b\u90a3\u4e48\u672c\u6587\u300a\u5982\u4f55\u5728\u8fde\u63a5\u5173\u95ed\u65f6\u7ec8\u6b62\u6b63\u5728\u8fd0\u884c\u7684\u67e5\u8be2\u300b\uff0c\u4e5f\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u5982\u679c\u9605\u8bfb\u5b8c\u540e\u771f\u7684\u5bf9\u4f60\u5b66\u4e60Golang\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u52a8\u52a8\u624b\u6307\uff0c\u8bc4\u8bba\u7559\u8a00\u5e76\u5206\u4eab~ \u95ee\u9898\u5185\u5bb9 \u6211\u4eec\u5728\u540e\u7aef\u4f7f\u7528 https:\/\/github.com\/go-gorm\/gorm\/ ORM \u548c\u811a\u672c\u6765\u8fde\u63a5\u5230\u6211\u4eec\u7684 PostgreSQL \u6570\u636e\u5e93\u3002 \u6709\u65f6\uff0c\u5f53\u811a\u672c\u6b63\u5728\u8fdb\u884c\u65f6\uff0c\u6211\u4eec\u4f1a\u901a\u8fc7\u5728\u672c\u5730\u6309 Ctrl + C \u6216\u5728\u751f\u4ea7\u4e2d\u7ec8\u6b62 pod\/\u8fdb\u7a0b\u6765\u624b\u52a8\u7ec8\u6b62\u4f5c\u4e1a\u3002\u6211\u4eec\u5728\u6240\u6709\u811a\u672c\u4e2d\u786e\u5b9e\u6709\u4e00\u4e2a defer DB.Close()\uff0c\u6211\u8fd8\u6dfb\u52a0\u4e86\u5904\u7406 SIGINT \/ SIGTERM \u4fe1\u53f7\u4ee5\u5728\u7ec8\u6b62\u65f6\u6267\u884c DB.Close() \u3002 \u95ee\u9898\u662f\uff0c\u5373\u4f7f\u5173\u95ed\u8fde\u63a5\u540e\uff0c\u4efb\u4f55\u5df2\u7ecf\u8fd0\u884c\u7684\u73b0\u6709\u67e5\u8be2\u4e5f\u4e0d\u4f1a\u88ab\u7ec8\u6b62\u5e76\u7ee7\u7eed\u5360\u7528\u6570\u636e\u5e93\u8d44\u6e90\u3002\u6709\u6ca1\u6709\u529e\u6cd5\u5728\u76f4\u63a5\u4ece gorm \u6216\u901a\u8fc7\u5176\u4ed6\u4e00\u4e9b hack \u9000\u51fa\u4e4b\u524d\u7ec8\u6b62\u6b64\u8fde\u63a5\u6c60\u542f\u52a8\u7684\u4efb\u4f55\u67e5\u8be2\u3002 \u8003\u8651\u4f7f\u7528 pg_backend_pid() \u5e76\u4f7f\u7528 pg_stat_activity \u7ec8\u6b62\u67e5\u8be2\uff0c\u4f46\u662f\u6211\u4eec\u5728\u8fd0\u884c\u65b0\u7684 pg_backend_pid() \u65f6\u83b7\u5f97\u7684 pid \u5c06\u4e0e\u6b63\u5728\u8fd0\u884c\u7684\u4e0d\u4e00\u6837\u3002 \u7248\u672c\uff1ajinzhu\/gorm v1.9.2 \u89e3\u51b3\u65b9\u6848 \u60a8\u53ef\u4ee5\u4f7f\u7528 begintx(ctx context.context, opts […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-43238","post","type-post","status-publish","format-standard","hentry","category-docker"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/43238","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=43238"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/43238\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=43238"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=43238"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=43238"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}