{"id":30126,"date":"2023-08-04T07:26:44","date_gmt":"2024-01-13T10:50:56","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8mongodb-4-2%e7%9a%84%e6%9b%b4%e6%96%b0%e5%91%bd%e4%bb%a4%e4%b8%ad%ef%bc%8c%e6%9c%893%e7%a7%8daggregate-pipeline-stage%e5%8f%af%e7%94%a8%ef%bc%8c%e5%8f%af%e4%bb%a5%e8%bf%9b%e8%a1%8c%e5%ad%97\/"},"modified":"2025-08-12T17:42:08","modified_gmt":"2025-08-12T09:42:08","slug":"%e5%9c%a8mongodb-4-2%e7%9a%84%e6%9b%b4%e6%96%b0%e5%91%bd%e4%bb%a4%e4%b8%ad%ef%bc%8c%e6%9c%893%e7%a7%8daggregate-pipeline-stage%e5%8f%af%e7%94%a8%ef%bc%8c%e5%8f%af%e4%bb%a5%e8%bf%9b%e8%a1%8c%e5%ad%97","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8mongodb-4-2%e7%9a%84%e6%9b%b4%e6%96%b0%e5%91%bd%e4%bb%a4%e4%b8%ad%ef%bc%8c%e6%9c%893%e7%a7%8daggregate-pipeline-stage%e5%8f%af%e7%94%a8%ef%bc%8c%e5%8f%af%e4%bb%a5%e8%bf%9b%e8%a1%8c%e5%ad%97\/","title":{"rendered":"\u5728MongoDB 4.2\u7684\u66f4\u65b0\u547d\u4ee4\u4e2d\uff0c\u67093\u79cdAggregate Pipeline Stage\u53ef\u7528\uff0c\u53ef\u4ee5\u8fdb\u884c\u5b57\u6bb5\u95f4\u7684\u8fd0\u7b97"},"content":{"rendered":"<h1>\u7b80\u8981\u4ecb\u7ecd<br \/>\n\u6982\u8ff0<br \/>\n\u603b\u7ed3\u5728MongoDB 4.2\u7248\u672c\u7684Update\u529f\u80fd\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7684\u805a\u5408\u7ba1\u9053\u9636\u6bb5\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">$set<\/ul>\n<\/li>\n<\/ul>\n<p>$addFields\u306e\u30a8\u30ea\u30a2\u30b9<\/p>\n<p>$unset<\/p>\n<p>$project\u306e\u30a8\u30ea\u30a2\u30b9<\/p>\n<p>$replaceWith<\/p>\n<p>$replaceRoot\u306e\u30a8\u30ea\u30a2\u30b9<\/p>\n<p>\u8fd9\u4e9b\u662f\u5728MongoDB4.2\u4e2d\u65b0\u589e\u7684\u529f\u80fd\uff0c\u800cMongoDB4.0\u4e4b\u524d\u7684$set\u7b49\u64cd\u4f5c\u7b26\u662fUpdate\u64cd\u4f5c\u7b26\uff0c\u800c\u4e0a\u8ff0\u662f\u901a\u8fc7Aggregate\u7ba1\u9053\u9636\u6bb5\u6765\u5b9e\u73b0\u3002<\/p>\n<h1>\u73af\u5883<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Windows10<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">MongoDB 4.2.0<\/ul>\n<h1>\u6587\u4ef6\u683c\u5f0f\u8fc4\u4eca\u4e3a\u6b62\u7684\u683c\u5f0f<\/p>\n<pre class=\"post-pre\"><code><span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">.<\/span><span class=\"nx\">update<\/span><span class=\"p\">({<\/span><span class=\"nx\">query<\/span><span class=\"p\">},{<\/span><span class=\"nx\">upadte<\/span><span class=\"p\">},{<\/span><span class=\"nx\">option<\/span><span class=\"p\">})<\/span>\r\n<\/code><\/pre>\n<p>\u5f53\u4f7f\u7528MongoDB4.2\u4e2d\u65b0\u589e\u7684\u805a\u5408\u7ba1\u9053\u9636\u6bb5\u65f6\u7684\u683c\u5f0f<\/p>\n<pre class=\"post-pre\"><code><span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">.<\/span><span class=\"nx\">update<\/span><span class=\"p\">({<\/span><span class=\"nx\">update<\/span><span class=\"p\">},[<\/span><span class=\"nx\">pipeline<\/span><span class=\"p\">],{<\/span><span class=\"nx\">option<\/span><span class=\"p\">})<\/span>\r\n<\/code><\/pre>\n<h1>\u5b9e\u65bd\u6848\u4f8b<\/p>\n<h2>\u6267\u884c\u6848\u4f8b1\u6ce8\u518c\u6837\u672c\u6570\u636e<\/p>\n<pre class=\"post-pre\"><code><span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">.<\/span><span class=\"nx\">insert<\/span><span class=\"p\">({<\/span><span class=\"na\">key<\/span><span class=\"p\">:<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"na\">a<\/span><span class=\"p\">:<\/span><span class=\"mi\">1<\/span><span class=\"p\">})<\/span>\r\n<\/code><\/pre>\n<p>\u5728Key\u4e3a1\u7684\u6587\u4ef6\u4e2d\uff0c\u5c06\u5b57\u6bb5b\u8bbe\u7f6e\u4e3aa+10\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">.<\/span><span class=\"nx\">update<\/span><span class=\"p\">({<\/span><span class=\"na\">key<\/span><span class=\"p\">:<\/span><span class=\"mi\">1<\/span><span class=\"p\">},<\/span> <span class=\"p\">[{<\/span><span class=\"na\">$set<\/span><span class=\"p\">:{<\/span><span class=\"na\">b<\/span><span class=\"p\">:{<\/span><span class=\"na\">$sum<\/span><span class=\"p\">:[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">$a<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"mi\">10<\/span><span class=\"p\">]}}}])<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">.<\/span><span class=\"nx\">find<\/span><span class=\"p\">({<\/span><span class=\"na\">key<\/span><span class=\"p\">:<\/span><span class=\"mi\">1<\/span><span class=\"p\">})<\/span>\r\n\r\n<span class=\"p\">{<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">_id<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"nx\">ObjectId<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">5d6331f494b7acefeeba2d7b<\/span><span class=\"dl\">\"<\/span><span class=\"p\">),<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">key<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">a<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">b<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">11<\/span> <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u6267\u884c\u793a\u4f8b2<br \/>\n\u6837\u672c\u6570\u636e\u7684\u6ce8\u518c<\/p>\n<pre class=\"post-pre\"><code><span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">.<\/span><span class=\"nx\">insert<\/span><span class=\"p\">({<\/span><span class=\"na\">key<\/span><span class=\"p\">:<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"na\">a<\/span><span class=\"p\">:<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"na\">b1<\/span><span class=\"p\">:<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"na\">b2<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">bbb<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"na\">c<\/span><span class=\"p\">:<\/span><span class=\"mi\">100<\/span><span class=\"p\">})<\/span>\r\n<\/code><\/pre>\n<p>\u5728key\u4e3a2\u7684\u6587\u6863\u4e2d\uff0c\u5c06b1\u548cb2\u8bbe\u4e3a\u5b50\u6587\u6863\uff0c\u5e76\u547d\u540d\u4e3ab\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">.<\/span><span class=\"nx\">update<\/span><span class=\"p\">({<\/span><span class=\"na\">key<\/span><span class=\"p\">:<\/span><span class=\"mi\">2<\/span><span class=\"p\">},<\/span>\r\n  <span class=\"p\">[{<\/span><span class=\"na\">$set<\/span><span class=\"p\">:{<\/span><span class=\"na\">b<\/span><span class=\"p\">:{<\/span><span class=\"na\">b1<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">$b1<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"na\">b2<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">$b2<\/span><span class=\"dl\">\"<\/span><span class=\"p\">}}},<\/span>\r\n   <span class=\"p\">{<\/span><span class=\"na\">$unset<\/span><span class=\"p\">:[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">b1<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">b2<\/span><span class=\"dl\">\"<\/span><span class=\"p\">]}<\/span>\r\n  <span class=\"p\">])<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">.<\/span><span class=\"nx\">find<\/span><span class=\"p\">({<\/span><span class=\"na\">key<\/span><span class=\"p\">:<\/span><span class=\"mi\">2<\/span><span class=\"p\">})<\/span>\r\n\r\n<span class=\"p\">{<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">_id<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"nx\">ObjectId<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">5d6334d81a1cb0219588b62c<\/span><span class=\"dl\">\"<\/span><span class=\"p\">),<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">key<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">a<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">c<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">100<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">b<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"p\">{<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">b1<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">b2<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">bbb<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">}<\/span> <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u521b\u5efa$b\u7684\u5b50\u6587\u6863\u540e\uff0c\u4f7f\u7528$unset\u5220\u9664\u539f\u6765\u7684b1\u548cb2\u3002<br \/>\n\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5728$unset\u4e2d\u4e0d\u8981\u7ed9\u5b57\u6bb5\u540d\u6dfb\u52a0$\u3002<\/p>\n<h2>\u4ee5\u4e0b\u662f\u7b2c\u4e09\u4e2a\u5b9e\u4f8b\u3002<br \/>\n\u5728\u6bd4\u8d77\u793a\u4f8b1\u66f4\u52a0\u590d\u6742\u7684\u60c5\u51b5\u4e0b\uff0c\u6839\u636e\u6761\u4ef6\u5c06\u64cd\u4f5c\u5bf9\u8c61\u5b57\u6bb5\u5206\u5f00\u3002<\/p>\n<p>\u6ce8\u518c\u6837\u672c\u6570\u636e<\/p>\n<pre class=\"post-pre\"><code><span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">.<\/span><span class=\"nx\">insert<\/span><span class=\"p\">({<\/span><span class=\"na\">key<\/span><span class=\"p\">:<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"na\">a<\/span><span class=\"p\">:<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"na\">b<\/span><span class=\"p\">:<\/span><span class=\"mi\">10<\/span><span class=\"p\">,<\/span> <span class=\"na\">c<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">1<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"na\">d<\/span><span class=\"p\">:<\/span><span class=\"mi\">20<\/span><span class=\"p\">})<\/span>\r\n<\/code><\/pre>\n<p>\u5982\u679cc\u7b49\u4e8e&#8221;1&#8243;\uff0c\u5219\u5c06a\u52a0\u5230d\u4e0a\uff1b\u5426\u5219\uff0c\u5c06b\u52a0\u5230d\u4e0a\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">.<\/span><span class=\"nx\">update<\/span><span class=\"p\">({<\/span><span class=\"na\">key<\/span><span class=\"p\">:<\/span><span class=\"mi\">3<\/span><span class=\"p\">},<\/span>\r\n  <span class=\"p\">[{<\/span><span class=\"na\">$set<\/span><span class=\"p\">:{<\/span><span class=\"na\">d<\/span><span class=\"p\">:{<\/span><span class=\"na\">$cond<\/span><span class=\"p\">:{<\/span>\r\n       <span class=\"na\">if<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span><span class=\"na\">$eq<\/span><span class=\"p\">:[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">$c<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">1<\/span><span class=\"dl\">\"<\/span><span class=\"p\">]},<\/span>\r\n       <span class=\"na\">then<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span><span class=\"na\">$sum<\/span><span class=\"p\">:[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">$d<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">$a<\/span><span class=\"dl\">\"<\/span><span class=\"p\">]},<\/span> \r\n       <span class=\"na\">else<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span><span class=\"na\">$sum<\/span><span class=\"p\">:[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">$d<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">$b<\/span><span class=\"dl\">\"<\/span><span class=\"p\">]}<\/span>\r\n   <span class=\"p\">}}}}<\/span>\r\n  <span class=\"p\">])<\/span>\r\n<\/code><\/pre>\n<p>\u786e\u8ba4D\u5df2\u7ecf\u4ece20\u66f4\u65b0\u523021\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"o\">&gt;<\/span>  <span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">collection<\/span><span class=\"p\">.<\/span><span class=\"nx\">find<\/span><span class=\"p\">({<\/span><span class=\"na\">key<\/span><span class=\"p\">:<\/span><span class=\"mi\">3<\/span><span class=\"p\">})<\/span>\r\n\r\n<span class=\"p\">{<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">_id<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"nx\">ObjectId<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">5d6337d61a1cb0219588b62d<\/span><span class=\"dl\">\"<\/span><span class=\"p\">),<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">key<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">3<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">a<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">b<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">10<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">c<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">1<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">d<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">21<\/span> <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u603b\u7ed3\u6211\u5f88\u9ad8\u5174\u4ee5\u524d\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u8fdb\u884c\u7684\u5904\u7406\u73b0\u5728\u53ef\u4ee5\u4f7f\u7528Update\u64cd\u4f5c\u7b26\u5b8c\u6210\u3002<br \/>\n\u6211\u8ba4\u4e3a\u5982\u679c\u4ee5\u540e\u4e5f\u53ef\u4ee5\u4f7f\u7528\u7c7b\u4f3c$lookup\u7684\u9636\u6bb5\uff0c\u90a3\u5c31\u592a\u597d\u4e86\u3002<\/p>\n<h1>\u53c2\u8003<\/p>\n<ul class=\"post-ul\">https:\/\/docs.mongodb.com\/manual\/reference\/method\/db.collection.update\/<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u8981\u4ecb\u7ecd \u6982\u8ff0 \u603b\u7ed3\u5728MongoDB 4.2\u7248\u672c\u7684Update\u529f\u80fd\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7684\u805a\u5408\u7ba1\u9053\u9636\u6bb5\u3002 $set  [&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-30126","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\/ -->\n<title>\u5728MongoDB 4.2\u7684\u66f4\u65b0\u547d\u4ee4\u4e2d\uff0c\u67093\u79cdAggregate Pipeline Stage\u53ef\u7528\uff0c\u53ef\u4ee5\u8fdb\u884c\u5b57\u6bb5\u95f4\u7684\u8fd0\u7b97 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u5728MongoDB 4.2\u7684\u66f4\u65b0\u547d\u4ee4\u4e2d\uff0c\u67093\u79cdAggregate Pipeline Stage\u53ef\u7528\uff0c\u53ef\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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