{"id":207902,"date":"2025-07-08T08:45:54","date_gmt":"2025-07-08T00:45:54","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207902\/"},"modified":"2025-07-08T08:45:54","modified_gmt":"2025-07-08T00:45:54","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-mongodb-%e5%ae%98%e6%96%b9%e9%a9%b1%e5%8a%a8%e7%a8%8b%e5%ba%8f%e4%bd%bf%e7%94%a8%e6%af%94%e8%be%83%e8%bf%90%e7%ae%97%e7%ac%a6%e6%9e%84%e5%bb%ba%e6%9f%a5%e8%af%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207902\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 mongodb \u5b98\u65b9\u9a71\u52a8\u7a0b\u5e8f\u4f7f\u7528\u6bd4\u8f83\u8fd0\u7b97\u7b26\u6784\u5efa\u67e5\u8be2\uff1f"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u4f7f\u7528 mongodb \u5b98\u65b9\u9a71\u52a8\u7a0b\u5e8f\u4f7f\u7528\u6bd4\u8f83\u8fd0\u7b97\u7b26\u6784\u5efa\u67e5\u8be2\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-26 16:42:37<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u201c\u7eb5\u6709\u75be\u98ce\u6765\uff0c\u4eba\u751f\u4e0d\u8a00\u5f03\u201d\uff0c\u8fd9\u53e5\u8bdd\u9001\u7ed9\u6b63\u5728\u5b66\u4e60Golang<\/span>\u7684\u670b\u53cb\u4eec\uff0c\u4e5f\u5e0c\u671b\u5728\u9605\u8bfb\u672c\u6587\u300a\u5982\u4f55\u4f7f\u7528 mongodb \u5b98\u65b9\u9a71\u52a8\u7a0b\u5e8f\u4f7f\u7528\u6bd4\u8f83\u8fd0\u7b97\u7b26\u6784\u5efa\u67e5\u8be2\uff1f\u300b<\/span>\u540e\uff0c\u80fd\u591f\u771f\u7684\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u6211\u4e5f\u4f1a\u5728\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\uff0c\u9646\u7eed\u66f4\u65b0Golang<\/span>\u76f8\u5173\u7684\u6280\u672f\u6587\u7ae0\uff0c\u6709\u597d\u7684\u5efa\u8bae\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u975e\u5e38\u611f\u8c22\uff01<\/p>\n

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

\u6211\u9700\u8981\u4f7f\u7528\u6bd4\u8f83\u8fd0\u7b97\u7b26\u6784\u5efa\u4e00\u4e2a\u67e5\u8be2\uff0c\u76f8\u5f53\u4e8e\u4f7f\u7528\u5b98\u65b9\u9a71\u52a8\u7a0b\u5e8f\u7684 db.inventory.find( { qty: { $gt: 20 }<\/code> )\u3002\u77e5\u9053\u5982\u4f55\u505a\u5230\u8fd9\u4e00\u70b9\u5417\uff1f<\/p>\n

<\/p>\n

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

<\/p>\n

\u8fde\u63a5\u5230\u670d\u52a1\u5668\u7c7b\u4f3c\u4e8e\uff1a<\/p>\n

client, err := mongo.newclient(\"mongodb:\/\/foo:bar@localhost:27017\")\nif err != nil { log.fatal(err) }\nerr = client.connect(context.todo())\nif err != nil { log.fatal(err) }<\/pre>\n
\u7136\u540e\u83b7\u53d6 inventory<\/code> \uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
coll := client.database(\"baz\").collection(\"inventory\")<\/pre>\n
\u7136\u540e\u60a8\u53ef\u4ee5\u4f7f\u7528 \u6267\u884c\u67e5\u8be2\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
ctx := context.background()\n\ncursor, err := coll.find(ctx,\n    bson.newdocument(\n        bson.ec.subdocumentfromelements(\"qty\",\n            bson.ec.int32(\"$gt\", 20),\n        ),\n    ),\n)\n\ndefer cursor.close(ctx) \/\/ make sure you close the cursor!<\/pre>\n
\u4f7f\u7528 \u8bfb\u53d6\u7ed3\u679c\uff1a<\/p>\n
doc := bson.NewDocument()\nfor cursor.Next(ctx) {\n    doc.Reset()\n    if err := cursor.Decode(doc); err != nil {\n        \/\/ Handle error\n        log.Printf(\"cursor.Decode failed: %v\", err)\n        return\n    }\n\n    \/\/ Do something with doc:\n    log.Printf(\"Result: %v\", doc)    \n}\n\nif err := cursor.Err(); err != nil {\n    log.Printf(\"cursor.Err: %v\", err)\n}<\/pre>\n
\u6ce8\u610f\uff1a\u6211\u4f7f\u7528\u5355\u4e2a \u503c\u6765\u8bfb\u53d6\u6240\u6709\u6587\u6863\uff0c\u5e76\u5728\u6bcf\u6b21\u8fed\u4ee3\u5f00\u59cb\u65f6\u4f7f\u7528\u5b83\u7684 \u6765\u6e05\u9664\u5b83\u5e76\u201c\u51c6\u5907\u201d\u5b83\u4ee5\u5c06\u65b0\u6587\u6863\u8bfb\u5165\u5176\u4e2d\u3002\u5982\u679c\u4f60\u60f3\u5b58\u50a8\u6587\u6863\uff08\u4f8b\u5982\u5728\u5207\u7247\u4e2d\uff09\uff0c\u90a3\u4e48\u4f60\u663e\u7136\u4e0d\u80fd\u8fd9\u6837\u505a\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ea\u9700\u5728\u6bcf\u6b21\u8fed\u4ee3\u4e2d\u521b\u5efa\u4e00\u4e2a\u65b0\u6587\u6863\uff0c\u4f8b\u5982 doc := bson.newdocument()<\/code>\u3002<\/p>\n
\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u5982\u4f55\u4f7f\u7528 mongodb \u5b98\u65b9\u9a71\u52a8\u7a0b\u5e8f\u4f7f\u7528\u6bd4\u8f83\u8fd0\u7b97\u7b26\u6784\u5efa\u67e5\u8be2\uff1f\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/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-207902","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207902","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=207902"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207902\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207902"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207902"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207902"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}