{"id":63702,"date":"2024-10-14T01:45:16","date_gmt":"2024-10-13T17:45:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/63702\/"},"modified":"2024-10-14T01:45:16","modified_gmt":"2024-10-13T17:45:16","slug":"mongodb%e8%a1%93%e8%aa%9e-%e5%be%9e%e5%b1%ac","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/63702\/","title":{"rendered":"MongoDB\u8853\u8a9e &#8211; \u5f9e\u5c6c"},"content":{"rendered":"<h1 id=\"mongodb%e8%a1%93%e8%aa%9e-%e5%be%9e%e5%b1%ac-BjXlVjWQzc\">MongoDB\u8853\u8a9e &#8211; 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id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%be%9e%e5%b1%ac-BjXlVjWQzc\">\u4ec0\u9ebc\u662f\u5f9e\u5c6c<\/h2>\n<p>\u5728MongoDB\u4e2d\uff0c\u300c\u5f9e\u5c6c\u300d\u901a\u5e38\u6307\u7684\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u5176\u4e2d\u4e00\u500b\u6587\u6a94\uff08\u6216\u96c6\u5408\uff09\u4f9d\u8cf4\u65bc\u53e6\u4e00\u500b\u6587\u6a94\u3002\u9019\u7a2e\u95dc\u4fc2\u53ef\u4ee5\u7528\u4f86\u8868\u793a\u4e00\u5c0d\u591a\u6216\u591a\u5c0d\u591a\u7684\u95dc\u4fc2\u3002\u5f9e\u5c6c\u95dc\u4fc2\u7684\u5efa\u7acb\u4f7f\u5f97\u6578\u64da\u7684\u7d44\u7e54\u548c\u67e5\u8a62\u8b8a\u5f97\u66f4\u52a0\u9748\u6d3b\u3002<\/p>\n<h2 id=\"%e5%be%9e%e5%b1%ac%e7%9a%84%e9%a1%9e%e5%9e%8b-BjXlVjWQzc\">\u5f9e\u5c6c\u7684\u985e\u578b<\/h2>\n<ul>\n<li><strong>\u4e00\u5c0d\u591a\u95dc\u4fc2\uff1a<\/strong>\u5728\u9019\u7a2e\u95dc\u4fc2\u4e2d\uff0c\u4e00\u500b\u6587\u6a94\u53ef\u4ee5\u95dc\u806f\u591a\u500b\u5f9e\u5c6c\u6587\u6a94\u3002\u4f8b\u5982\uff0c\u4e00\u500b\u7528\u6236\u53ef\u4ee5\u64c1\u6709\u591a\u500b\u8a02\u55ae\u3002<\/li>\n<li><strong>\u591a\u5c0d\u591a\u95dc\u4fc2\uff1a<\/strong>\u5728\u9019\u7a2e\u95dc\u4fc2\u4e2d\uff0c\u5169\u500b\u6587\u6a94\u96c6\u5408\u4e4b\u9593\u53ef\u4ee5\u4e92\u76f8\u95dc\u806f\u3002\u4f8b\u5982\uff0c\u5b78\u751f\u548c\u8ab2\u7a0b\u4e4b\u9593\u7684\u95dc\u4fc2\uff0c\u4e00\u500b\u5b78\u751f\u53ef\u4ee5\u9078\u64c7\u591a\u500b\u8ab2\u7a0b\uff0c\u800c\u4e00\u500b\u8ab2\u7a0b\u4e5f\u53ef\u4ee5\u6709\u591a\u500b\u5b78\u751f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%9c%a8mongodb%e4%b8%ad%e5%af%a6%e7%8f%be%e5%be%9e%e5%b1%ac-BjXlVjWQzc\">\u5982\u4f55\u5728MongoDB\u4e2d\u5be6\u73fe\u5f9e\u5c6c<\/h2>\n<p>\u5728MongoDB\u4e2d\uff0c\u5be6\u73fe\u5f9e\u5c6c\u95dc\u4fc2\u7684\u5e38\u898b\u65b9\u6cd5\u6709\u5169\u7a2e\uff1a\u5d4c\u5957\u6587\u6a94\u548c\u5f15\u7528\u6587\u6a94\u3002<\/p>\n<h3 id=\"1-%e5%b5%8c%e5%a5%97%e6%96%87%e6%aa%94-BjXlVjWQzc\">1. \u5d4c\u5957\u6587\u6a94<\/h3>\n<p>\u5d4c\u5957\u6587\u6a94\u662f\u5c07\u5f9e\u5c6c\u6587\u6a94\u76f4\u63a5\u5d4c\u5165\u5230\u4e3b\u6587\u6a94\u4e2d\u3002\u9019\u7a2e\u65b9\u6cd5\u9069\u5408\u65bc\u5f9e\u5c6c\u6587\u6a94\u6578\u91cf\u8f03\u5c11\u4e14\u4e0d\u9700\u8981\u55ae\u7368\u67e5\u8a62\u7684\u60c5\u6cc1\u3002<\/p>\n<pre><code>{\n    \"_id\": 1,\n    \"name\": \"John Doe\",\n    \"orders\": [\n        {\n            \"order_id\": 101,\n            \"amount\": 250\n        },\n        {\n            \"order_id\": 102,\n            \"amount\": 150\n        }\n    ]\n}<\/code><\/pre>\n<h3 id=\"2-%e5%bc%95%e7%94%a8%e6%96%87%e6%aa%94-BjXlVjWQzc\">2. \u5f15\u7528\u6587\u6a94<\/h3>\n<p>\u5f15\u7528\u6587\u6a94\u5247\u662f\u5c07\u5f9e\u5c6c\u6587\u6a94\u7684ID\u5b58\u5132\u5728\u4e3b\u6587\u6a94\u4e2d\u3002\u9019\u7a2e\u65b9\u6cd5\u9069\u5408\u65bc\u5f9e\u5c6c\u6587\u6a94\u6578\u91cf\u8f03\u591a\u6216\u9700\u8981\u55ae\u7368\u67e5\u8a62\u7684\u60c5\u6cc1\u3002<\/p>\n<pre><code>{\n    \"_id\": 1,\n    \"name\": \"John Doe\",\n    \"order_ids\": [101, 102]\n}<\/code><\/pre>\n<p>\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u8a02\u55ae\u7684\u8a73\u7d30\u4fe1\u606f\u5c07\u5b58\u5132\u5728\u53e6\u4e00\u500b\u96c6\u5408\u4e2d\uff0c\u4e26\u901a\u904eID\u9032\u884c\u67e5\u8a62\u3002<\/p>\n<h2 id=\"%e5%be%9e%e5%b1%ac%e7%9a%84%e6%9f%a5%e8%a9%a2-BjXlVjWQzc\">\u5f9e\u5c6c\u7684\u67e5\u8a62<\/h2>\n<p>\u5728MongoDB\u4e2d\uff0c\u67e5\u8a62\u5f9e\u5c6c\u6587\u6a94\u53ef\u4ee5\u4f7f\u7528\u805a\u5408\u7ba1\u9053\u6216\u67e5\u8a62\u64cd\u4f5c\u7b26\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u805a\u5408\u7ba1\u9053\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>db.users.aggregate([\n    {\n        $lookup: {\n            from: \"orders\",\n            localField: \"order_ids\",\n            foreignField: \"_id\",\n            as: \"order_details\"\n        }\n    }\n])<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u5f9e\u300cusers\u300d\u96c6\u5408\u4e2d\u67e5\u8a62\u7528\u6236\u7684\u8a02\u55ae\u8a73\u7d30\u4fe1\u606f\uff0c\u4e26\u5c07\u5176\u5408\u4f75\u5230\u7d50\u679c\u4e2d\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-BjXlVjWQzc\">\u7d50\u8ad6<\/h2>\n<p>\u5f9e\u5c6c\u95dc\u4fc2\u5728MongoDB\u4e2d\u662f\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7d44\u7e54\u548c\u7ba1\u7406\u6578\u64da\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u5d4c\u5957\u6587\u6a94\u9084\u662f\u5f15\u7528\u6587\u6a94\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u6a21\u578b\u90fd\u80fd\u63d0\u9ad8\u6578\u64da\u7684\u53ef\u8b80\u6027\u548c\u67e5\u8a62\u6548\u7387\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u7406\u89e3\u548c\u904b\u7528\u5f9e\u5c6c\u95dc\u4fc2\u5c07\u5c0d\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u64f4\u5c55\u6027\u7522\u751f\u6df1\u9060\u5f71\u97ff\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bcMongoDB\u6216\u5176\u4ed6\u6578\u64da\u5eab\u6280\u8853\u6709\u9032\u4e00\u6b65\u7684\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\u3002\u6211\u5011\u63d0\u4f9b\u5404\u7a2e<a 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