{"id":29762,"date":"2024-02-03T13:34:56","date_gmt":"2023-11-07T19:50:02","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%a6%82%e6%9e%9c%e5%b8%8c%e6%9c%9b%e6%8c%89%e9%a1%ba%e5%ba%8f%e5%a4%84%e7%90%86%e5%8c%85%e5%90%ab%e5%bc%82%e6%ad%a5%e5%a4%84%e7%90%86%e7%9a%84%e5%be%aa%e7%8e%af%ef%bc%8c%e5%8f%af%e4%bb%a5%e4%bd%bf\/"},"modified":"2025-08-12T15:46:02","modified_gmt":"2025-08-12T07:46:02","slug":"%e5%a6%82%e6%9e%9c%e5%b8%8c%e6%9c%9b%e6%8c%89%e9%a1%ba%e5%ba%8f%e5%a4%84%e7%90%86%e5%8c%85%e5%90%ab%e5%bc%82%e6%ad%a5%e5%a4%84%e7%90%86%e7%9a%84%e5%be%aa%e7%8e%af%ef%bc%8c%e5%8f%af%e4%bb%a5%e4%bd%bf","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%a6%82%e6%9e%9c%e5%b8%8c%e6%9c%9b%e6%8c%89%e9%a1%ba%e5%ba%8f%e5%a4%84%e7%90%86%e5%8c%85%e5%90%ab%e5%bc%82%e6%ad%a5%e5%a4%84%e7%90%86%e7%9a%84%e5%be%aa%e7%8e%af%ef%bc%8c%e5%8f%af%e4%bb%a5%e4%bd%bf\/","title":{"rendered":"\u5982\u679c\u5e0c\u671b\u6309\u987a\u5e8f\u5904\u7406\u5305\u542b\u5f02\u6b65\u5904\u7406\u7684\u5faa\u73af\uff0c\u53ef\u4ee5\u4f7f\u7528AsyncAwait\u6765\u7b80\u6d01\u5730\u7f16\u5199\u4ee3\u7801\u6bb5"},"content":{"rendered":"<h2>\u9996\u5148<\/h2>\n<p>\u5c31\u5728\u4e0d\u4e45\u4e4b\u524d\uff0c\u6211\u624d\u4ee5\u4e3a Node.js \u7684 LTS \u7248\u672c\u5347\u7ea7\u5230\u4e86 6 \u7cfb\u5217\uff0c\u7ed3\u679c\u8ddd\u79bb\u4e0b\u4e00\u4e2a LTS \u7248\u672c\uff088 \u7cfb\u5217\uff09\u7684\u53d1\u5e03\u53ea\u5269\u4e0b\u5927\u7ea6\u4e00\u4e2a\u6708\u7684\u65f6\u95f4\u4e86\u3002<br \/>\n\u7ec8\u4e8e\u7b49\u5230\u4e86\u671f\u5f85\u5df2\u4e45\u7684 AsyncAwait \u7684\u63a8\u51fa\uff01<\/p>\n<h2>\u672c\u6587\u4e3a\u4e00\u7bc7\u4e2d\u6587\u7684\u540c\u4e49\u8f6c\u8ff0\u9898\u76ee\u3002<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u544a\u8bc9\u4f60\u4ee5\u524d\u4e00\u76f4\u5f88\u9ebb\u70e6\u7684\u5f02\u6b65\u5904\u7406\u4e32\u884c\u5faa\u73af\uff0c\u5728AsyncAwait\u4e2d\u4f1a\u53d8\u5f97\u5f88\u6e05\u6670\u7b80\u6d01\u3002<\/p>\n<p>\u5728MongoDB\u4e2d\uff0c\u4ee5\u5c06\u4e00\u4e2a\u96c6\u5408\u7684\u5185\u5bb9\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u96c6\u5408\u4e3a\u4f8b\u5b50\u3002<br \/>\n\uff08\u4fdd\u7559\u4e0d\u76f8\u5173\u5b57\u6bb5\u7684\u503c\uff09<\/p>\n<p>\u6211\u4eec\u6b63\u5728\u4f7f\u7528Node.js 8.2\u3001MongoDB 3.4\u548c2.2\u7248\u672c\u7684\u9a71\u52a8\u7a0b\u5e8f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/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\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">uri<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">process<\/span><span class=\"p\">.<\/span><span class=\"nx\">env<\/span><span class=\"p\">.<\/span><span class=\"nx\">MONGO_URI<\/span> <span class=\"o\">||<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">mongodb:\/\/127.0.0.1:27017\/test?max_pool_size=1<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u30b3\u30d4\u30fc<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">copy<\/span> <span class=\"o\">=<\/span> <span class=\"k\">async<\/span> <span class=\"p\">(<\/span><span class=\"nx\">db<\/span><span class=\"p\">,<\/span> <span class=\"k\">from<\/span><span class=\"p\">,<\/span> <span class=\"nx\">to<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">src<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">(<\/span><span class=\"k\">from<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">dst<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">(<\/span><span class=\"nx\">to<\/span><span class=\"p\">);<\/span>\r\n\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">cond<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{};<\/span> <span class=\"c1\">\/\/ \u691c\u7d22\u6761\u4ef6<\/span>\r\n\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">cursor<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">src<\/span><span class=\"p\">.<\/span><span class=\"nx\">find<\/span><span class=\"p\">(<\/span><span class=\"nx\">cond<\/span><span class=\"p\">);<\/span>\r\n\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">update<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"nx\">c<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nx\">c<\/span><span class=\"p\">.<\/span><span class=\"nx\">next<\/span><span class=\"p\">().<\/span><span class=\"nx\">then<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"kd\">const<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">_id<\/span> <span class=\"p\">}<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">obj<\/span><span class=\"p\">;<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"nx\">dst<\/span><span class=\"p\">.<\/span><span class=\"nx\">updateOne<\/span><span class=\"p\">({<\/span> <span class=\"nx\">_id<\/span> <span class=\"p\">},<\/span> <span class=\"p\">{<\/span> <span class=\"na\">$set<\/span><span class=\"p\">:<\/span> <span class=\"nx\">obj<\/span> <span class=\"p\">},<\/span> <span class=\"p\">{<\/span> <span class=\"na\">upsert<\/span><span class=\"p\">:<\/span> <span class=\"kc\">true<\/span> <span class=\"p\">});<\/span>\r\n    <span class=\"p\">});<\/span>\r\n  <span class=\"p\">};<\/span>\r\n\r\n  <span class=\"k\">while<\/span> <span class=\"p\">(<\/span><span class=\"k\">await<\/span> <span class=\"nx\">cursor<\/span><span class=\"p\">.<\/span><span class=\"nx\">hasNext<\/span><span class=\"p\">())<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">await<\/span> <span class=\"nx\">update<\/span><span class=\"p\">(<\/span><span class=\"nx\">cursor<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">};<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u30e1\u30a4\u30f3<\/span>\r\n<span class=\"kd\">let<\/span> <span class=\"nx\">db<\/span><span class=\"p\">;<\/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=\"nx\">uri<\/span><span class=\"p\">).<\/span><span class=\"nx\">then<\/span><span class=\"p\">(<\/span><span class=\"nx\">_db<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\r\n  <span class=\"nx\">db<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">_db<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"k\">return<\/span> <span class=\"nx\">copy<\/span><span class=\"p\">(<\/span><span class=\"nx\">db<\/span><span class=\"p\">,<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">data_src<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">data_dst<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"p\">}).<\/span><span class=\"nx\">then<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nx\">db<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">close<\/span><span class=\"p\">();<\/span>\r\n  <span class=\"nx\">process<\/span><span class=\"p\">.<\/span><span class=\"nx\">exit<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}).<\/span><span class=\"k\">catch<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nx\">db<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">close<\/span><span class=\"p\">();<\/span>\r\n  <span class=\"nx\">process<\/span><span class=\"p\">.<\/span><span class=\"nx\">exit<\/span><span class=\"p\">(<\/span><span class=\"o\">-<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">});<\/span>\r\n<\/code><\/pre>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u6700\u540e\uff0c\u91cd\u8981\u7684\u662f<\/p>\n<ul class=\"post-ul\">\n\u300casync \u95a2\u6570\u300d\u306f\u3001\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067 promise \u306b\u306a\u308b<br \/>\nawait \u306f async \u95a2\u6570\u5185\u90e8\u3060\u3051\u3067\u6709\u52b9\u306a\u30ad\u30fc\u30ef\u30fc\u30c9<br \/>\npromise \u306b await \u3092\u4ed8\u3051\u308c\u3070\u3001\u305d\u3053\u3067\u975e\u540c\u671f\u51e6\u7406\u306e\u7d42\u4e86\u3092\u5f85\u3063\u3066\u304f\u308c\u308b\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u5c31\u5728\u4e0d\u4e45\u4e4b\u524d\uff0c\u6211\u624d\u4ee5\u4e3a Node.js \u7684 LTS \u7248\u672c\u5347\u7ea7\u5230\u4e86 6 \u7cfb\u5217\uff0c\u7ed3\u679c\u8ddd\u79bb\u4e0b\u4e00\u4e2a LTS \u7248\u672c [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-29762","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 SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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