{"id":29791,"date":"2023-07-20T04:20:47","date_gmt":"2023-08-22T16:21:41","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%8d%b3%e5%b0%86%e5%8f%91%e5%b8%83%ef%bc%81mongodb-2-6%e7%89%88%e6%9c%ac%e5%8f%91%e5%b8%83%e5%a4%87%e6%b3%a8%e7%bf%bb%e8%af%91%ef%bc%9a%e8%81%9a%e5%90%88%e7%ae%a1%e9%81%93%e7%9a%84%e5%8f%98%e6%9b%b4\/"},"modified":"2025-08-12T15:55:49","modified_gmt":"2025-08-12T07:55:49","slug":"%e5%8d%b3%e5%b0%86%e5%8f%91%e5%b8%83%ef%bc%81mongodb-2-6%e7%89%88%e6%9c%ac%e5%8f%91%e5%b8%83%e5%a4%87%e6%b3%a8%e7%bf%bb%e8%af%91%ef%bc%9a%e8%81%9a%e5%90%88%e7%ae%a1%e9%81%93%e7%9a%84%e5%8f%98%e6%9b%b4","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%8d%b3%e5%b0%86%e5%8f%91%e5%b8%83%ef%bc%81mongodb-2-6%e7%89%88%e6%9c%ac%e5%8f%91%e5%b8%83%e5%a4%87%e6%b3%a8%e7%bf%bb%e8%af%91%ef%bc%9a%e8%81%9a%e5%90%88%e7%ae%a1%e9%81%93%e7%9a%84%e5%8f%98%e6%9b%b4\/","title":{"rendered":"\u5373\u5c06\u53d1\u5e03\uff01MongoDB 2.6\u7248\u672c\u53d1\u5e03\u5907\u6ce8\u7ffb\u8bd1\uff1a\u805a\u5408\u7ba1\u9053\u7684\u53d8\u66f4\u5185\u5bb9"},"content":{"rendered":"<p>\u8fd9\u662fMongoDB\u7684\u5723\u8bde\u65e5\u5386\u7684\u586b\u7a7a\u6587\u7ae0\u3002<\/p>\n<p>\u6211\u5df2\u7ecf\u7ffb\u8bd1\u4e86\u5373\u5c06\u53d1\u5e03\u7684MongoDB 2.6\u7684\u90e8\u5206\u53d1\u884c\u8bf4\u660e\u3002\u5c3d\u7ba1\u53ea\u6709\u4e00\u5c0f\u90e8\u5206\uff0c\u4f46\u8fd9\u6b21\u662f\u5173\u4e8e\u805a\u5408\u7ba1\u9053\u7684\u53d8\u66f4\u3002<\/p>\n<p>\u4e0b\u6b21\uff0c\u6211\u5c06\u7ffb\u8bd12.6\u7248\u672c\u4e2d\u91cd\u5927\u66f4\u6539\u7684\u5e16\u5b50\u64cd\u4f5c\u7684\u53d8\u52a8\u3002<\/p>\n<p>\u6ce8\u610f\uff1aMongoDB 2.6\u8ba1\u5212\u5728\u5e74\u5185\u53d1\u5e03\u3002<\/p>\n<p>\u5143\u7684\u53d1\u5e03\u8bf4\u660e\u5728\u8fd9\u91cc\uff1a<br \/>\nhttp:\/\/docs.mongodb.org\/master\/release-notes\/2.6\/<\/p>\n<p>\u8bf7\u5e2e\u6211\u4ee5\u4e2d\u6587\u91cd\u65b0\u7ffb\u8bd1\u4ee5\u4e0b\u5185\u5bb9\uff0c\u53ea\u9700\u7ed9\u51fa\u4e00\u4e2a\u9009\u9879:<br \/>\n\u4ed6\u5904\u7684\u7ffb\u8bd1<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u307e\u3068\u3081\uff01MongoDB 2.6\u306e\u30ea\u30ea\u30fc\u30b9\u30ce\u30fc\u30c8\u7ffb\u8a33\u3068\u6240\u611f<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30ea\u30ea\u30fc\u30b9\u9593\u8fd1\uff01MongoDB 2.6\u306e\u30ea\u30ea\u30fc\u30b9\u30ce\u30fc\u30c8\u7ffb\u8a33: \u65e2\u5b58\u6a5f\u80fd\u306e\u5909\u66f4\u70b9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30ea\u30ea\u30fc\u30b9\u9593\u8fd1\uff01MongoDB 2.6\u306e\u30ea\u30ea\u30fc\u30b9\u30ce\u30fc\u30c8\u7ffb\u8a33: \u65b0\u767b\u5834\u306eWrite Command\u305f\u3061<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30ea\u30ea\u30fc\u30b9\u9593\u8fd1\uff01MongoDB 2.6\u306e\u30ea\u30ea\u30fc\u30b9\u30ce\u30fc\u30c8\u7ffb\u8a33: \u65b0\u6a5f\u80fd\u3068\u6539\u5584\u70b9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30ea\u30ea\u30fc\u30b9\u9593\u8fd1\uff01MongoDB 2.6\u306e\u30ea\u30ea\u30fc\u30b9\u30ce\u30fc\u30c8\u7ffb\u8a33: \u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u5411\u3051\u6a5f\u80fd<\/ul>\n<h2>\u76ee\u5f55<\/h2>\n<h3>\u5168\u65b0\u529f\u80fd<\/h3>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30a2\u30b0\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306e\u5909\u66f4\u70b9<\/ul>\n<\/li>\n<\/ul>\n<p>db.collection.aggregation()\u304c\u7b2c\uff12\u5f15\u6570\u3092\u53d6\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f<\/p>\n<p>$out\u30b9\u30c6\u30fc\u30b8\u306e\u8ffd\u52a0<br \/>\n\u30a2\u30b0\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u306f\u30ab\u30fc\u30bd\u30eb\u3092\u8fd4\u3059\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f<br \/>\n\u30a2\u30b0\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u7528\u306eexplain\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8ffd\u52a0<br \/>\n\u30bd\u30fc\u30c8\u306b\u95a2\u3059\u308b\u6539\u5584\u70b9<br \/>\n\u30d5\u30a3\u30fc\u30eb\u30c9\u30ec\u30d9\u30eb\u30a2\u30af\u30bb\u30b9\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3092\u63d0\u4f9b\u3059\u308b$redact\u30b9\u30c6\u30fc\u30b8\u306e\u8ffd\u52a0<br \/>\n\u30a2\u30b0\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3067\u3001$set\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u30b5\u30dd\u30fc\u30c8<\/p>\n<p>$map\u3068$let\u304c\u30a2\u30b0\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3067\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f<\/p>\n<p>$literal\u304c\u30a2\u30b0\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3067\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f<\/p>\n<p>$cond\u304c\u5f15\u6570\u3068\u3057\u3066Objects\u3092\u53d6\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f<br \/>\n\u65b0\u3057\u3044$size\u30aa\u30da\u30ec\u30fc\u30bf\u30fc\u304c\u30a2\u30b0\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306b\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f<\/p>\n<h2>\u805a\u5408\u7ba1\u9053\u7684\u4fee\u6539\u70b9<\/h2>\n<h3>db.collection.aggregation() \u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\u5df2\u7ecf\u53ef\u7528\u3002<\/h3>\n<p>\u53ef\u4ee5\u4f7f\u7528\u7b2c2\u4e2a\u53c2\u6570\u6765\u8bbe\u7f6eoption\u3002<br \/>\n\uff08\u6ce8\u91ca\uff1a\u73b0\u5728\u53ef\u4ee5\u6307\u5b9aexplain\uff0callowDiskUsage\u548ccursor\u9009\u9879\u3002\uff09<\/p>\n<p>\u8a73\u7d30\u60c5\u5831: db.collection.aggregate()<\/p>\n<h3>\u589e\u52a0$out\u821e\u53f0<\/h3>\n<p>\u65b0\u589e\u4e86\u4e00\u4e2a\u540d\u4e3a$out\u7684\u9636\u6bb5\uff0c\u7528\u4e8e\u5c06\u805a\u5408\u7ba1\u9053\u7684\u7ed3\u679c\u5199\u5165\u5230\u96c6\u5408\u4e2d\u3002<\/p>\n<p>\u8be6\u7ec6\u4fe1\u606f\uff1a\u8f93\u51fa\u6587\u4ef6\u7684\u6587\u6863<\/p>\n<h3>\u30a2\u30b0\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u306f\u30ab\u30fc\u30bd\u30eb\u3092\u8fd4\u3059\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f<\/h3>\n<p>mongo\u30b7\u30a7\u30eb\u306edb.collection.aggregate()\u304c\u30ab\u30fc\u30bd\u30eb\u3092\u8fd4\u3059\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u30ab\u30fc\u30bd\u30eb\u3092\u8fd4\u3059\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u30a2\u30b0\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306f\u3001\u4efb\u610f\u306e\u30b5\u30a4\u30ba\u306e\u7d50\u679c\u30bb\u30c3\u30c8\u3092\u8fd4\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u524d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u3001\u96c6\u8a08\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u7d50\u679c\u306f\u300116\u30e1\u30ac\u30d0\u30a4\u30c8\u3088\u308a\u5927\u304d\u304f\u306a\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n<p>\u8be6\u7ec6\u4fe1\u606f\uff1adb.collection.aggregate\uff08\uff09<\/p>\n<h3>\u30a2\u30b0\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u7528\u306eexplain\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8ffd\u52a0<\/h3>\n<p>\u30a2\u30b0\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u306e\u305f\u3081\u306e\u65b0\u3057\u3044explain\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u3001mongod\u304c\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3092\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306e\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n<p>\u5177\u4f53\u4fe1\u606f\uff1adb.collection.aggregate()\uff0c\u805a\u5408<\/p>\n<h3>\u5bf9\u4e8e\u6392\u5e8f\u7b97\u6cd5\u7684\u6539\u8fdb\u70b9<\/h3>\n<p>$sort\u548c$group\u7684\u6027\u80fd\u5f97\u5230\u4e86\u6539\u5584\uff0c\u63d0\u4f9b\u4e86\u66f4\u9ad8\u6548\u7684\u6392\u5e8f\u7cfb\u7edf\u3002<br \/>\n\u6b64\u5916\uff0c\u65b0\u6dfb\u52a0\u7684allowDiskUsage\u9009\u9879\u4f7f\u5f97\u53ef\u4ee5\u5c06\u6570\u636e\u5199\u5165\u4e34\u65f6\u6587\u4ef6\u4e2d\u7684\u5904\u7406\u9636\u6bb5\u6210\u4e3a\u53ef\u80fd\u3002<\/p>\n<p>\u66f4\u591a\u4fe1\u606f\uff1adb.collection.aggregate()\uff0c\u805a\u5408\u3002<\/p>\n<h3>\u30d5\u30a3\u30fc\u30eb\u30c9\u30ec\u30d9\u30eb\u30a2\u30af\u30bb\u30b9\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3092\u63d0\u4f9b\u3059\u308b$redact\u30b9\u30c6\u30fc\u30b8\u306e\u8ffd\u52a0<\/h3>\n<p>$redact\u9636\u6bb5\u53ef\u4ee5\u5728\u7ba1\u9053\u4e2d\u4ee5\u5b57\u6bb5\u7ea7\u522b\u9650\u5236\u7ed3\u679c\u3002<\/p>\n<p>\u8a73\u7d30\u4fe1\u606f\uff1a$redact<\/p>\n<h3>\u5728\u805a\u5408\u7ba1\u9053\u4e2d\uff0c\u652f\u6301$set\u64cd\u4f5c\u3002<\/h3>\n<p>$project\u548c$redact\u652f\u6301\u4e86$set\u64cd\u4f5c\u3002<\/p>\n<h3>\u73b0\u5728\u53ef\u4ee5\u5728\u805a\u5408\u7ba1\u9053\u4e2d\u4f7f\u7528$map\u548c$let\u3002<\/h3>\n<p>\u4f7f\u7528$map\u548c$let\uff0c\u805a\u5408\u7ba1\u9053\u4e2d\u53ef\u4ee5\u58f0\u660e\u548c\u64cd\u4f5c\u53d8\u91cf\u3002\u53ef\u4ee5\u5728$project\u3001$group\u548c$redact\u4e2d\u4f7f\u7528\u3002<\/p>\n<p>\u8be6\u7ec6\u4fe1\u606f\uff1a$let\uff08\u805a\u5408\uff09\uff0c$map\uff08\u805a\u5408\uff09<\/p>\n<h3>\u73b0\u5728 $literal \u5df2\u7ecf\u53ef\u4ee5\u5728\u805a\u5408\u7ba1\u9053\u4e2d\u4f7f\u7528\u4e86\u3002<\/h3>\n<p>\u5df2\u7ecf\u5f15\u5165\u4e86\u65b0\u7684\u64cd\u4f5c\u5668\uff0c\u53ef\u4ee5\u660e\u786e\u5730\u6307\u5b9a\u5b57\u7b26\u4e32\u3002<br \/>\n(\u6ce8\uff1a\u5728\u4f7f\u7528\u7279\u6b8a\u542b\u4e49\u5b57\u7b26\uff0c\u5982&#8221;$&#8221;\u7b49\u7528\u4e8eMongoDB\u65f6\u4f7f\u7528\u3002)<\/p>\n<p>\u8be6\u7ec6\u4fe1\u606f\uff1a$literal(\u6c47\u603b)<\/p>\n<h3>$cond\u73b0\u5728\u53ef\u4ee5\u63a5\u53d7Object\u4f5c\u4e3a\u53c2\u6570\u3002<\/h3>\n<p>\u4ee5\u524d\uff0c\u6761\u4ef6$cond\u7684\u53c2\u6570\u53ea\u80fd\u662f\u6570\u7ec4\uff0c\u73b0\u5728\u4e5f\u53ef\u4ee5\u662f\u5bf9\u8c61\u4e86\u3002<\/p>\n<p>\uff08\u6ce8: $cond \u662f condition \u7684\u7f29\u5199\uff0c\u901a\u8fc7\u5c06 if 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