{"id":207980,"date":"2025-07-08T13:53:44","date_gmt":"2025-07-08T05:53:44","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207980\/"},"modified":"2025-07-08T13:53:44","modified_gmt":"2025-07-08T05:53:44","slug":"gorm-%e5%a4%84%e7%90%86-hasone-%e5%85%b3%e7%b3%bb","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207980\/","title":{"rendered":"Gorm \u5904\u7406 HasOne \u5173\u7cfb"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>Gorm \u5904\u7406 HasOne \u5173\u7cfb<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-27 15:33:49<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>Golang\u5c0f\u767d\u4e00\u679a\uff0c\u6b63\u5728\u4e0d\u65ad\u5b66\u4e60\u79ef\u7d2f\u77e5\u8bc6\uff0c\u73b0\u5c06\u5b66\u4e60\u5230\u7684\u77e5\u8bc6\u8bb0\u5f55\u4e00\u4e0b\uff0c\u4e5f\u662f\u5c06\u6211\u7684\u6240\u5f97\u5206\u4eab\u7ed9\u5927\u5bb6\uff01\u800c\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0\u300aGorm \u5904\u7406 HasOne \u5173\u7cfb\u300b\u5e26\u5927\u5bb6\u6765\u4e86\u89e3\u4e00\u4e0b##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p><\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6211\u5728 gorm \u548c mysql \u65b9\u9762\u9047\u5230\u95ee\u9898\u3002\u6211\u6709\u8fd9\u6837\u7684\u7ed3\u6784\uff1a<\/p>\n<pre>type Users struct {\nID          string\nBalance     Balances\nModel\n}\n\ntype Model struct {\nCreatedAt time.Time\nUpdatedAt time.Time\nDeletedAt *time.Time\n}\n\ntype Balances struct {\nUID     string `gorm:\"foreignkey:ID;unique_index\"`\nUSD     int\n}<\/pre>\n<p>\u6211\u60f3\u9009\u62e9\u4f59\u989d\u4e2d\u7f8e\u5143\u5b57\u6bb5\u5927\u4e8e 0 \u7684\u7528\u6237\u3002\u6211\u8be5\u600e\u4e48\u505a\uff1f<\/p>\n<p>\u65e0\u8bba\u5982\u4f55\uff0c<code>db.find(&amp;users)<\/code> \u83b7\u53d6\u6240\u6709\u7528\u6237\uff0c\u4f46\u4e0d\u662f\u4ed6\u4eec\u7684\u4f59\u989d\u3002\u4e8b\u5b9e\u4e0a\uff0c\u6267\u884c\u7684\u67e5\u8be2\u662f\uff1a<code>select * from users where users.deleted_at is null<\/code><\/p>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p>\u4f7f\u7528 <code>.joins()<\/code> \u5c06 <code>users<\/code> \u4e0e <code>balances<\/code> \u8fde\u63a5\uff0c\u7136\u540e\u4f7f\u7528 <code>.where()<\/code> \u4f7f\u7528\u6761\u4ef6<\/p>\n<pre>user := users{}\ndb.joins(\"join balances on balances.uid = users.id\").where(\"balances.usd &gt; 0\").find(&amp;user)<\/pre>\n<p><strong>\u66f4\u65b0\uff1a<\/strong> \u5c1d\u8bd5\u7ea0\u6b63\u60a8\u4e0e\u9884\u8f7d\u5e73\u8861\u7684\u5173\u7cfb<\/p>\n<pre>type Users struct {\nID          string \nBalance     Balances `gorm:\"foreignkey:UID;association_foreignkey:ID\"`\nModel\n}\n\ntype Balances struct {\nUID     string `gorm:\"unique_index\"`\nUSD     int\n}<\/pre>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aGorm \u5904\u7406 HasOne \u5173\u7cfb\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591aGolang\u77e5\u8bc6\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#46;&#46;&#46;<\/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-207980","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207980","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=207980"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207980\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207980"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207980"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}