{"id":30048,"date":"2023-12-14T16:23:50","date_gmt":"2023-01-29T09:38:50","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8mongodb%e5%92%8cexpress-js%e8%bf%9b%e8%a1%8c%e4%bd%8d%e7%bd%ae%e4%bf%a1%e6%81%af%ef%bc%88%e7%ba%ac%e5%ba%a6%e7%bb%8f%e5%ba%a6%ef%bc%89%e6%90%9c%e7%b4%a2%e3%80%82-2\/"},"modified":"2025-08-12T17:16:37","modified_gmt":"2025-08-12T09:16:37","slug":"%e4%bd%bf%e7%94%a8mongodb%e5%92%8cexpress-js%e8%bf%9b%e8%a1%8c%e4%bd%8d%e7%bd%ae%e4%bf%a1%e6%81%af%ef%bc%88%e7%ba%ac%e5%ba%a6%e7%bb%8f%e5%ba%a6%ef%bc%89%e6%90%9c%e7%b4%a2%e3%80%82-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8mongodb%e5%92%8cexpress-js%e8%bf%9b%e8%a1%8c%e4%bd%8d%e7%bd%ae%e4%bf%a1%e6%81%af%ef%bc%88%e7%ba%ac%e5%ba%a6%e7%bb%8f%e5%ba%a6%ef%bc%89%e6%90%9c%e7%b4%a2%e3%80%82-2\/","title":{"rendered":"\u4f7f\u7528MongoDB\u548cexpress.js\u8fdb\u884c\u4f4d\u7f6e\u4fe1\u606f\uff08\u7eac\u5ea6\u7ecf\u5ea6\uff09\u641c\u7d22"},"content":{"rendered":"<p>\u53ea\u9700\u8981\u4e00\u79cd\u9009\u62e9\uff1a<br \/>\n\u662f\u5750\u6807\u641c\u7d22\u5417\uff1f<br \/>\n\u662f\u4f4d\u7f6e\u4fe1\u606f\u641c\u7d22\u5417\uff1f\u8fd9\u79cd\u4e1c\u897f\u600e\u4e48\u8bf4\u6765\u7740<br \/>\n\u6682\u65f6\u5c06\u4e24\u4e2a\u70b9\u7684\u6570\u503c\u4f5c\u4e3a\u5750\u6807\u5904\u7406\uff0c<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u79cd\u6309\u7167\u63a5\u8fd1\u7a0b\u5ea6\u63d0\u53d6\u6570\u636e\u7684\u5907\u5fd8\u5f55\u65b9\u6cd5\u3002<\/p>\n<h3>\u6d4b\u8bd5\u6570\u636e<\/h3>\n<pre class=\"post-pre\"><code><span class=\"p\">{<\/span>\r\n  <span class=\"dl\">\"<\/span><span class=\"s2\">_id<\/span><span class=\"dl\">\"<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">16188bfdf093f<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"dl\">\"<\/span><span class=\"s2\">loc<\/span><span class=\"dl\">\"<\/span><span class=\"p\">:[<\/span><span class=\"mf\">139.000000000<\/span><span class=\"p\">,<\/span><span class=\"mf\">35.000000000<\/span><span class=\"p\">]<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u4ee3\u7801 (Mandarin Chinese)<\/h3>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/\u5229\u7528\u3059\u308b\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u3092\u8aad\u307f\u8fbc\u307f\u307e\u3059<\/span>\r\n<span class=\"kd\">var<\/span> <span class=\"nx\">search<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">require<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">.\/routes\/search <\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<span class=\"nx\">app<\/span><span class=\"p\">.<\/span><span class=\"nx\">use<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">\/search<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"nx\">search<\/span> <span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">var<\/span> <span class=\"nx\">mongodb<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">require<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">mongodb<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<span class=\"kd\">var<\/span> <span class=\"nx\">data_collection<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/mongoDB\u306b\u63a5\u7d9a<\/span>\r\n<span class=\"c1\">\/\/\u305d\u3057\u3066\u30ab\u30e9\u30e0\u300cloc\u300d\u3092\uff12\u6b21\u5143\u5ea7\u6a19\u3068\u3057\u3066\u8a2d\u5b9a\u3059\u308b<\/span>\r\n<span class=\"nx\">mongodb<\/span><span class=\"p\">.<\/span><span class=\"nx\">MongoClient<\/span><span class=\"p\">.<\/span><span class=\"nx\">connect<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">mongodb:\/\/localhost:27017\/test<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"kd\">function<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span><span class=\"p\">,<\/span> <span class=\"nx\">database<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">if<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span><span class=\"p\">){}<\/span>\r\n  <span class=\"nx\">data_collection<\/span><span class=\"o\">=<\/span> <span class=\"nx\">database<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">data_collection<\/span><span class=\"dl\">\"<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"nx\">data_collection<\/span><span class=\"p\">.<\/span><span class=\"nx\">ensureIndex<\/span><span class=\"p\">({<\/span><span class=\"na\">loc<\/span><span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">2dsphere<\/span><span class=\"dl\">\"<\/span><span class=\"p\">},<\/span> <span class=\"p\">{},<\/span> <span class=\"kd\">function<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span><span class=\"p\">,<\/span> <span class=\"nx\">result<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span><span class=\"k\">if<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span><span class=\"p\">){}<\/span><span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">result<\/span><span class=\"p\">)});<\/span>\r\n<span class=\"p\">});<\/span>\r\n\r\n<span class=\"nx\">router<\/span><span class=\"p\">.<\/span><span class=\"kd\">get<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">\/<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"kd\">function<\/span><span class=\"p\">(<\/span><span class=\"nx\">req<\/span><span class=\"p\">,<\/span> <span class=\"nx\">res<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n\r\n  <span class=\"c1\">\/\/\u30ea\u30af\u30a8\u30b9\u30c8\u5185\u306e\u5ea7\u6a19\u60c5\u5831\u3092\u53d6\u5f97<\/span>\r\n  <span class=\"kd\">var<\/span> <span class=\"nx\">lat<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">req<\/span><span class=\"p\">.<\/span><span class=\"nx\">query<\/span><span class=\"p\">.<\/span><span class=\"nx\">lat<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"kd\">var<\/span> <span class=\"nx\">lng<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">req<\/span><span class=\"p\">.<\/span><span class=\"nx\">query<\/span><span class=\"p\">.<\/span><span class=\"nx\">lng<\/span><span class=\"p\">;<\/span>\r\n\r\n  <span class=\"kd\">var<\/span> <span class=\"nx\">searchObject<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> \r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">loc<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"p\">{<\/span> \r\n        <span class=\"na\">$nearSphere<\/span> <span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"nb\">parseFloat<\/span><span class=\"p\">(<\/span><span class=\"nx\">lng<\/span><span class=\"p\">)<\/span> <span class=\"p\">,<\/span><span class=\"nb\">parseFloat<\/span><span class=\"p\">(<\/span><span class=\"nx\">lat<\/span><span class=\"p\">)]<\/span>\r\n    <span class=\"p\">}<\/span>\r\n  <span class=\"p\">};<\/span>\r\n\r\n  <span class=\"c1\">\/\/ \u5ea7\u6a19\u304b\u3089\u8fd1\u3044\u9806\u306b50\u4ef6\u3092\u53d6\u5f97<\/span>\r\n  <span class=\"c1\">\/\/ \u975e\u540c\u671f\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u51e6\u7406\u306a\u306e\u3067\u6ce8\u610f\u3002<\/span>\r\n  <span class=\"c1\">\/\/ \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304b\u3089\u5024\u3092\u53d6\u5f97\u3059\u308b\u3002<\/span>\r\n  <span class=\"nx\">data_collection<\/span><span class=\"p\">.<\/span><span class=\"nx\">find<\/span><span class=\"p\">(<\/span><span class=\"nx\">searchObject<\/span><span class=\"p\">).<\/span><span class=\"nx\">limit<\/span><span class=\"p\">(<\/span><span class=\"mi\">50<\/span><span class=\"p\">).<\/span><span class=\"nx\">toArray<\/span><span class=\"p\">(<\/span><span class=\"kd\">function<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span><span class=\"p\">,<\/span> <span class=\"nx\">items<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">if<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span><span class=\"p\">){<\/span><span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span><span class=\"p\">)}<\/span>\r\n    <span class=\"nx\">res<\/span><span class=\"p\">.<\/span><span class=\"nx\">send<\/span><span class=\"p\">({<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">items<\/span><span class=\"dl\">\"<\/span><span class=\"p\">:<\/span><span class=\"nx\">items<\/span><span class=\"p\">});<\/span>\r\n  <span class=\"p\">});<\/span><span class=\"c1\">\/\/find<\/span>\r\n\r\n<span class=\"p\">});<\/span><span class=\"c1\">\/\/router<\/span>\r\n<\/code><\/pre>\n<p>\u6211\u5bf9\u8fd9\u4e2a\u95ee\u9898\u7684\u7ed8\u753b\u65b9\u6cd5\u5b8c\u5168\u4e0d\u660e\u767d\uff0c\u88ab\u56f0\u4f4f\u4e86&#8230;<br \/>\n\u53ea\u662f\u5fd8\u8bb0\u4e86\u4f7f\u7528parseFloat\u51fd\u6570\u3002\u771f\u4e22\u4eba\u3002<\/p>\n<pre class=\"post-pre\"><code>  <span class=\"kd\">var<\/span> <span class=\"nx\">searchObject<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> \r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">loc<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"p\">{<\/span> \r\n        <span class=\"na\">$nearSphere<\/span> <span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"nb\">parseFloat<\/span><span class=\"p\">(<\/span><span class=\"nx\">lng<\/span><span class=\"p\">)<\/span> <span class=\"p\">,<\/span><span class=\"nb\">parseFloat<\/span><span class=\"p\">(<\/span><span class=\"nx\">lat<\/span><span class=\"p\">)]<\/span>\r\n    <span class=\"p\">}<\/span>\r\n  <span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u53ea\u9700\u8981\u4e00\u79cd\u9009\u62e9\uff1a \u662f\u5750\u6807\u641c\u7d22\u5417\uff1f \u662f\u4f4d\u7f6e\u4fe1\u606f\u641c\u7d22\u5417\uff1f\u8fd9\u79cd\u4e1c\u897f\u600e\u4e48\u8bf4\u6765\u7740 \u6682\u65f6\u5c06\u4e24\u4e2a\u70b9\u7684\u6570\u503c\u4f5c\u4e3a\u5750\u6807\u5904\u7406\uff0c \u4ee5\u4e0b [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30048","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast 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