{"id":207223,"date":"2025-07-08T10:20:01","date_gmt":"2025-07-08T02:20:01","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207223\/"},"modified":"2025-07-08T10:20:01","modified_gmt":"2025-07-08T02:20:01","slug":"golang-%e4%b8%ad%e5%b5%8c%e5%a5%97%e4%be%9d%e8%b5%96%e6%b3%a8%e5%85%a5%e5%8f%af%e4%bb%a5%e6%8e%a5%e5%8f%97%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207223\/","title":{"rendered":"golang \u4e2d\u5d4c\u5957\u4f9d\u8d56\u6ce8\u5165\u53ef\u4ee5\u63a5\u53d7\u5417\uff1f"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> golang \u4e2d\u5d4c\u5957\u4f9d\u8d56\u6ce8\u5165\u53ef\u4ee5\u63a5\u53d7\u5417\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-20 22:06:29<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2aGolang\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300agolang \u4e2d\u5d4c\u5957\u4f9d\u8d56\u6ce8\u5165\u53ef\u4ee5\u63a5\u53d7\u5417\uff1f\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n

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

\u5d4c\u5957\u4f9d\u8d56\u6ce8\u5165\u6709\u4ec0\u4e48\u95ee\u9898\u5417\uff1f\u4f8b\u5982\uff1a<\/p>\n

type ParentService struct{\n    db *sql.DB\n}\n\ntype UsefulChildStruct struct{\n    attrA int\n    attrB int\n\n    db *sql.Db\n\n}\n\nfunc NewParent(db *sql.DB) *ParentService{\n    return &ParentService{db: db}\n}\n\nfunc (p *ParentService) NewChild() *UsefulChildStruct{\n    return &UsefulChildStruct{db: p.db}\n}\n\nfunc (c *UsefulChildStruct) DoSomething(){\n    x := c.db.SomeQuery\n}\n\nfunc (c *UsefulChildStruct) DoAnotherThing(){\n    x := c.db.SomeQuery\n}\n\nfunc main(){\n    db := getDB()\n    parent := NewParent(db)\n    child := parent.NewChild(parent.db)\n}<\/pre>\n
\u5176\u57fa\u672c\u539f\u7406\u662f\uff0c\u7531 parentservice \u521b\u5efa\u7684\u6240\u6709\u6570\u636e\u7c7b\u578b\u4e5f\u90fd\u80fd\u591f\u4f7f\u7528\u8be5\u4f9d\u8d56\u9879\u3002<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u8fd9\u6837\u505a\u6ca1\u6709\u95ee\u9898\u3002\u4f46\u662f\u9664\u4e86\u590d\u6742\u6027\u4e4b\u5916\uff0c\u4f60\u6ca1\u6709\u521b\u9020\u4efb\u4f55\u4ef7\u503c\uff01<\/p>\n
\u53e6\u4e00\u4e2a\u95ee\u9898\u662f\u4f60\u9650\u5236\u4e86\u81ea\u5df1\uff0c\u5982\u679c\u4f60\u60f3\u4ee5\u540e\u4f7f\u7528\u4e0d\u540c\u7684db\u4f5c\u4e3aUsefulChildStruct\uff0c\u4f60\u5fc5\u987b\u6539\u53d8\u4f60\u7684\u4ee3\u7801\u3002\u8fd9\u8fdd\u53cd\u4e86\u5f00\u653e\u6269\u5c55\u5173\u95ed\u4fee\u6539\u539f\u5219<\/p>\n
\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300agolang \u4e2d\u5d4c\u5957\u4f9d\u8d56\u6ce8\u5165\u53ef\u4ee5\u63a5\u53d7\u5417\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207223","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207223","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=207223"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207223\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}