{"id":205629,"date":"2025-06-12T11:10:49","date_gmt":"2025-06-12T03:10:49","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205629\/"},"modified":"2025-06-12T11:10:49","modified_gmt":"2025-06-12T03:10:49","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-mongodb-%e8%81%9a%e5%90%88%e6%9f%a5%e8%af%a2%e5%ae%9e%e7%8e%b0%e5%8a%a8%e6%80%81%e6%9d%a1%e4%bb%b6%e5%8c%b9%e9%85%8d%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205629\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 MongoDB \u805a\u5408\u67e5\u8be2\u5b9e\u73b0\u52a8\u6001\u6761\u4ef6\u5339\u914d\uff1f"},"content":{"rendered":"<p>\u600e\u4e48\u5165\u95e8GOLANG\u7f16\u7a0b\uff1f\u9700\u8981\u5b66\u4e60\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f\u8fd9\u662f\u65b0\u624b\u4eec\u521a\u63a5\u89e6\u7f16\u7a0b\u65f6\u5e38\u89c1\u7684\u95ee\u9898\uff1b\u4e0b\u9762GOLANG\u5c31\u6765\u7ed9\u5927\u5bb6\u6574\u7406\u5206\u4eab\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u591f\u7ed9\u521d\u5b66\u8005\u4e00\u4e9b\u5e2e\u52a9\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u4ecb\u7ecd\u300a\u5982\u4f55\u4f7f\u7528 MongoDB \u805a\u5408\u67e5\u8be2\u5b9e\u73b0\u52a8\u6001\u6761\u4ef6\u5339\u914d\uff1f\u300b\uff0c\u6d89\u53ca\u5230\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u6536\u85cf\u4e00\u4e0b,<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729934333671cb3fd602cc.jpg\" class=\"aligncenter\">,<br \/>\n<strong>mongodb \u805a\u5408\u67e5\u8be2\uff1a\u5b9e\u73b0\u52a8\u6001\u6761\u4ef6\u5339\u914d<\/strong>,mongodb \u4e2d\u7684\u805a\u5408\u67e5\u8be2\u5141\u8bb8\u5bf9\u6587\u6863\u8fdb\u884c\u590d\u6742\u7684\u6570\u636e\u64cd\u4f5c\u548c\u805a\u5408\u3002\u5728\u4f7f\u7528\u805a\u5408\u67e5\u8be2\u65f6\uff0c\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528 $match \u64cd\u4f5c\u7b26\u6765\u6839\u636e\u6307\u5b9a\u6761\u4ef6\u7b5b\u9009\u6587\u6863\u3002,<br \/>\n<strong>\u95ee\u9898\u8bf4\u660e<\/strong>,\u5728\u805a\u5408\u67e5\u8be2\u4e2d\uff0c\u6709\u65f6\u9700\u8981\u5339\u914d\u53ef\u9009\u6761\u4ef6\u3002\u4f8b\u5982\uff0c&#8221;knowledge_points&#8221; \u548c &#8220;difficulty&#8221; \u5b57\u6bb5\u53ef\u80fd\u662f\u53ef\u9009\u6761\u4ef6\uff0c\u4ec5\u5f53\u5b83\u4eec\u5177\u6709\u503c\u65f6\u624d\u9700\u8981\u8fdb\u884c\u5339\u914d\u3002,<br \/>\n<strong>\u4ee3\u7801\u793a\u4f8b<\/strong>,\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 bson.m \u7c7b\u578b\u6765\u5b9e\u73b0\u52a8\u6001\u6761\u4ef6\u5339\u914d\uff1a,<br \/>\n<strong>\u89e3\u7b54<\/strong>,\u5728\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u521b\u5efa\u4e86\u4e00\u4e2a map[string]interface{} \u7c7b\u578b\u7684\u67e5\u8be2 map\u3002\u7136\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u9700\u8981\u5c06\u4e0d\u540c\u7684\u6761\u4ef6\u6dfb\u52a0\u5230\u67e5\u8be2 map \u4e2d\u3002\u4f8b\u5982\uff0c\u5982\u679c bankid \u5927\u4e8e 0\uff0c\u5219\u5c06 &#8220;bank_id&#8221; \u6dfb\u52a0\u5230\u67e5\u8be2 map \u4e2d\u3002,\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u4f7f\u7528\u67e5\u8be2 map \u6784\u5efa where \u67e5\u8be2\uff0c\u5e76\u5c06\u5b83\u4e0e\u91c7\u6837\u67e5\u8be2 num \u7ec4\u5408\u8d77\u6765\u3002\u8fd9\u6837\uff0c\u6211\u4eec\u5728\u8fdb\u884c\u805a\u5408\u67e5\u8be2\u65f6\uff0c\u53ea\u4f1a\u6839\u636e\u67e5\u8be2 map \u4e2d\u5b58\u5728\u7684\u6761\u4ef6\u8fdb\u884c\u5339\u914d\u3002,\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u52a8\u6001\u5730\u6dfb\u52a0\u548c\u79fb\u9664\u6761\u4ef6\uff0c\u4ece\u800c\u5b9e\u73b0\u5f3a\u5927\u7684\u53ef\u914d\u7f6e\u67e5\u8be2\u3002,\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u5982\u4f55\u4f7f\u7528 MongoDB \u805a\u5408\u67e5\u8be2\u5b9e\u73b0\u52a8\u6001\u6761\u4ef6\u5339\u914d\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591aGOLANG\u77e5\u8bc6\uff01,mongodb \u805a\u5408\u67e5\u8be2\uff1a\u5b9e\u73b0\u52a8\u6001\u6761\u4ef6\u5339\u914d,\u600e\u4e48\u5165\u95e8GOLANG\u7f16\u7a0b\uff1f\u9700\u8981\u5b66\u4e60\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f\u8fd9\u662f\u65b0\u624b\u4eec\u521a\u63a5\u89e6\u7f16\u7a0b\u65f6\u5e38\u89c1\u7684\u95ee\u9898\uff1b\u4e0b\u9762GOLANG\u5c31\u6765\u7ed9\u5927\u5bb6\u6574\u7406\u5206\u4eab\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u591f\u7ed9\u521d\u5b66\u8005\u4e00\u4e9b\u5e2e\u52a9\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u4ecb\u7ecd\u300a\u5982\u4f55\u4f7f\u7528 MongoDB \u805a\u5408\u67e5\u8be2\u5b9e\u73b0\u52a8\u6001\u6761\u4ef6\u5339\u914d\uff1f\u300b\uff0c\u6d89\u53ca\u5230\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u6536\u85cf\u4e00\u4e0b,<br \/>\n<b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span> <span>\u5982\u4f55\u4f7f\u7528 MongoDB \u805a\u5408\u67e5\u8be2\u5b9e\u73b0\u52a8\u6001\u6761\u4ef6\u5339\u914d\uff1f<\/span><\/p>\n<h1>\u5982\u4f55\u4f7f\u7528 MongoDB \u805a\u5408\u67e5\u8be2\u5b9e\u73b0\u52a8\u6001\u6761\u4ef6\u5339\u914d\uff1f<\/h1>\n<p><span>2024-10-26 17:19:09<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u600e\u4e48\u5165\u95e8GOLANG\u7f16\u7a0b\uff1f\u9700\u8981\u5b66\u4e60\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f\u8fd9\u662f\u65b0\u624b\u4eec\u521a\u63a5\u89e6\u7f16\u7a0b\u65f6\u5e38\u89c1\u7684\u95ee\u9898\uff1b\u4e0b\u9762GOLANG\u5c31\u6765\u7ed9\u5927\u5bb6\u6574\u7406\u5206\u4eab\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u591f\u7ed9\u521d\u5b66\u8005\u4e00\u4e9b\u5e2e\u52a9\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u4ecb\u7ecd\u300a\u5982\u4f55\u4f7f\u7528 MongoDB \u805a\u5408\u67e5\u8be2\u5b9e\u73b0\u52a8\u6001\u6761\u4ef6\u5339\u914d\uff1f\u300b\uff0c\u6d89\u53ca\u5230\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u6536\u85cf\u4e00\u4e0b<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729934333671cb3fd602cc.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>mongodb \u805a\u5408\u67e5\u8be2\uff1a\u5b9e\u73b0\u52a8\u6001\u6761\u4ef6\u5339\u914d<\/strong><\/p>\n<p>mongodb \u4e2d\u7684\u805a\u5408\u67e5\u8be2\u5141\u8bb8\u5bf9\u6587\u6863\u8fdb\u884c\u590d\u6742\u7684\u6570\u636e\u64cd\u4f5c\u548c\u805a\u5408\u3002\u5728\u4f7f\u7528\u805a\u5408\u67e5\u8be2\u65f6\uff0c\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528 $match \u64cd\u4f5c\u7b26\u6765\u6839\u636e\u6307\u5b9a\u6761\u4ef6\u7b5b\u9009\u6587\u6863\u3002<\/p>\n<p><strong>\u95ee\u9898\u8bf4\u660e<\/strong><\/p>\n<p>\u5728\u805a\u5408\u67e5\u8be2\u4e2d\uff0c\u6709\u65f6\u9700\u8981\u5339\u914d\u53ef\u9009\u6761\u4ef6\u3002\u4f8b\u5982\uff0c&#8221;knowledge_points&#8221; \u548c &#8220;difficulty&#8221; \u5b57\u6bb5\u53ef\u80fd\u662f\u53ef\u9009\u6761\u4ef6\uff0c\u4ec5\u5f53\u5b83\u4eec\u5177\u6709\u503c\u65f6\u624d\u9700\u8981\u8fdb\u884c\u5339\u914d\u3002<\/p>\n<p><strong>\u4ee3\u7801\u793a\u4f8b<\/strong><\/p>\n<p>\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 bson.m \u7c7b\u578b\u6765\u5b9e\u73b0\u52a8\u6001\u6761\u4ef6\u5339\u914d\uff1a<\/p>\n<pre>var query map[string]interface{}\nquery = make(map[string]interface{})\nquery[\"user_id\"] = userId\nif bankId &gt; 0 {\n    query[\"bank_id\"] = bankId\n}\nif difficulty != \"\" {\n    query[\"difficulty\"] = difficulty\n}\n\nwhere := bson.M{\"$match\": query}\n\nnum := bson.M{\"$sample\": bson.M{\"size\": questionNum}}\n\nerr := repo.collection().Pipe([]bson.M{where, num}).All(&amp;b)\nif err != nil {\n    return nil, err\n}<\/pre>\n<p><strong>\u89e3\u7b54<\/strong><\/p>\n<p>\u5728\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u521b\u5efa\u4e86\u4e00\u4e2a map[string]interface{} \u7c7b\u578b\u7684\u67e5\u8be2 map\u3002\u7136\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u9700\u8981\u5c06\u4e0d\u540c\u7684\u6761\u4ef6\u6dfb\u52a0\u5230\u67e5\u8be2 map \u4e2d\u3002\u4f8b\u5982\uff0c\u5982\u679c bankid \u5927\u4e8e 0\uff0c\u5219\u5c06 &#8220;bank_id&#8221; \u6dfb\u52a0\u5230\u67e5\u8be2 map \u4e2d\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u4f7f\u7528\u67e5\u8be2 map \u6784\u5efa where \u67e5\u8be2\uff0c\u5e76\u5c06\u5b83\u4e0e\u91c7\u6837\u67e5\u8be2 num \u7ec4\u5408\u8d77\u6765\u3002\u8fd9\u6837\uff0c\u6211\u4eec\u5728\u8fdb\u884c\u805a\u5408\u67e5\u8be2\u65f6\uff0c\u53ea\u4f1a\u6839\u636e\u67e5\u8be2 map \u4e2d\u5b58\u5728\u7684\u6761\u4ef6\u8fdb\u884c\u5339\u914d\u3002<\/p>\n<p>\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u52a8\u6001\u5730\u6dfb\u52a0\u548c\u79fb\u9664\u6761\u4ef6\uff0c\u4ece\u800c\u5b9e\u73b0\u5f3a\u5927\u7684\u53ef\u914d\u7f6e\u67e5\u8be2\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u5982\u4f55\u4f7f\u7528 MongoDB \u805a\u5408\u67e5\u8be2\u5b9e\u73b0\u52a8\u6001\u6761\u4ef6\u5339\u914d\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591aGOLANG\u77e5\u8bc6\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   Java\u51fd\u6570\u7684\u4f18\u52bf\u7f3a\u70b9\u5927\u63ed\u79d8\n <\/dd>\n<\/dl>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   \u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u8fdb\u884c\u8f93\u5165\u9a8c\u8bc1\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u600e\u4e48\u5165\u95e8GOLANG\u7f16\u7a0b\uff1f\u9700\u8981\u5b66&#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-205629","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205629","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=205629"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205629\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}