{"id":29676,"date":"2023-09-13T01:07:27","date_gmt":"2023-07-30T09:57:35","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/node-js%e7%9a%84mongoclient%e8%a7%84%e8%8c%83%e5%b7%b2%e7%bb%8f%e6%94%b9%e5%8f%98%e4%ba%86%e3%80%82\/"},"modified":"2025-08-12T15:19:22","modified_gmt":"2025-08-12T07:19:22","slug":"node-js%e7%9a%84mongoclient%e8%a7%84%e8%8c%83%e5%b7%b2%e7%bb%8f%e6%94%b9%e5%8f%98%e4%ba%86%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/node-js%e7%9a%84mongoclient%e8%a7%84%e8%8c%83%e5%b7%b2%e7%bb%8f%e6%94%b9%e5%8f%98%e4%ba%86%e3%80%82\/","title":{"rendered":"Node.js\u7684MongoClient\u89c4\u8303\u5df2\u7ecf\u6539\u53d8\u4e86"},"content":{"rendered":"

\u6700\u8fd1\u521a\u521a\u5728\u5b89\u88c5npm\u540e\uff0c\u50cf\u5f80\u5e38\u4e00\u6837\u5c1d\u8bd5\u8fde\u63a5\u65f6\u51fa\u73b0\u4e86TypeError: db.collection\u4e0d\u662f\u4e00\u4e2a\u51fd\u6570\u7684\u9519\u8bef\uff0c\u6240\u4ee5\u6211\u67e5\u4e86\u4e00\u4e0b\uff0c\u4f3c\u4e4e\u662f\u4ece3\u7cfb\u7248\u672c\u5f00\u59cb\u89c4\u683c\u53d1\u751f\u4e86\u53d8\u5316\u3002<\/p>\n

\u73b0\u5728MongoClient.connect\u8fd4\u56de\u4e00\u4e2aClient\u800c\u4e0d\u662f\u4e00\u4e2aDB
\nhttp:\/\/mongodb.github.io\/node-mongodb-native\/3.0\/upgrade-migration\/main\/<\/p><\/blockquote>\n

\u7528\u6cd5<\/h1>\n

\u53d8\u66f4\u524d<\/h2>\n
const<\/span> MongoClient<\/span> =<\/span> require<\/span>(<\/span>\"<\/span>mongodb<\/span>\"<\/span>).<\/span>MongoClient<\/span>;<\/span>\r\n\r\nconst<\/span> _url<\/span> =<\/span> '<\/span>mongodb:\/\/heroku_xxxxxxxx:lvojimq4uc5lu7fnljpg5b2vig@ds999999.mlab.com:49511\/heroku_xxxxxxxx<\/span>'<\/span>;<\/span>\r\n\r\nMongoClient<\/span>.<\/span>connect<\/span>(<\/span>_url<\/span>,<\/span> (<\/span>err<\/span>,<\/span> db<\/span>)<\/span> =><\/span> {<\/span>\r\n  db<\/span>.<\/span>collection<\/span>(<\/span>'<\/span>foobar<\/span>'<\/span>,<\/span> (<\/span>err<\/span>,<\/span> collection<\/span>)<\/span> =><\/span> {<\/span>\r\n    collection<\/span>.<\/span>find<\/span>().<\/span>toArray<\/span>((<\/span>err<\/span>,<\/span> docs<\/span>)<\/span> =><\/span> {<\/span>\r\n      :<\/span>\r\n      :<\/span>\r\n\r\n    });<\/span>\r\n  });<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
\u66f4\u6539\u4e4b\u540e<\/h2>\n
const<\/span> MongoClient<\/span> =<\/span> require<\/span>(<\/span>\"<\/span>mongodb<\/span>\"<\/span>).<\/span>MongoClient<\/span>;<\/span>\r\n\r\nconst<\/span> _url<\/span> =<\/span> '<\/span>mongodb:\/\/heroku_xxxxxxxx:lvojimq4uc5lu7fnljpg5b2vig@ds999999.mlab.com:49511\/heroku_xxxxxxxx<\/span>'<\/span>;<\/span>\r\n\r\nMongoClient<\/span>.<\/span>connect<\/span>(<\/span>_url<\/span>,<\/span> (<\/span>err<\/span>,<\/span> client<\/span>)<\/span> =><\/span> {<\/span>\r\n  \/\/ callback\u306b\u6e21\u3055\u308c\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5909\u308f\u3063\u305f<\/span>\r\n  \/\/ db\u540d\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3057\u3066db\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b<\/span>\r\n  const<\/span> db<\/span> =<\/span> client<\/span>.<\/span>db<\/span>(<\/span>'<\/span>heroku_xxxxxxxx<\/span>'<\/span>);<\/span>\r\n\r\n  db<\/span>.<\/span>collection<\/span>(<\/span>'<\/span>foobar<\/span>'<\/span>,<\/span> (<\/span>err<\/span>,<\/span> collection<\/span>)<\/span> =><\/span> {<\/span>\r\n    collection<\/span>.<\/span>find<\/span>().<\/span>toArray<\/span>((<\/span>err<\/span>,<\/span> docs<\/span>)<\/span> =><\/span> {<\/span>\r\n      :<\/span>\r\n      :<\/span>\r\n\r\n    });<\/span>\r\n  });<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
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