{"id":21756,"date":"2024-01-02T14:47:25","date_gmt":"2024-01-02T14:47:25","guid":{"rendered":"https:\/\/server.hk\/blog\/21756\/"},"modified":"2024-11-14T10:27:32","modified_gmt":"2024-11-14T02:27:32","slug":"how-to-fix-mongodb-error-code-170-toomanymatchingdocuments","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21756\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 MongoDB \u932f\u8aa4\u4ee3\u78bc – 170 – TooManyMatchingDocuments"},"content":{"rendered":"

\u5982\u4f55\u4fee\u5fa9 MongoDB \u932f\u8aa4\u4ee3\u78bc – 170 – TooManyMatchingDocuments<\/h1>\n

MongoDB \u662f\u4e00\u500b\u6d41\u884c\u7684 NoSQL \u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u9ad8\u6027\u80fd\u3001\u53ef\u64f4\u5c55\u6027\u548c\u9748\u6d3b\u6027\u3002\u7136\u800c\uff0c\u50cf\u5176\u4ed6\u8edf\u4ef6\u4e00\u6a23\uff0c\u5b83\u53ef\u80fd\u6703\u9047\u5230\u9700\u8981\u89e3\u6c7a\u7684\u932f\u8aa4\u3002\u5176\u4e2d\u4e00\u500b\u932f\u8aa4\u662f MongoDB \u932f\u8aa4\u4ee3\u78bc – 170 – TooManyMatchingDocuments\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e\u6b64\u932f\u8aa4\u7684\u542b\u7fa9\u4ee5\u53ca\u5982\u4f55\u4fee\u5fa9\u5b83\u3002<\/p>\n

\u7406\u89e3 MongoDB \u932f\u8aa4\u4ee3\u78bc – 170 – TooManyMatchingDocuments<\/h2>\n

\u7576\u60a8\u9047\u5230 MongoDB \u932f\u8aa4\u4ee3\u78bc – 170 – TooManyMatchingDocuments \u6642\uff0c\u9019\u610f\u5473\u8457\u60a8\u57f7\u884c\u7684\u67e5\u8a62\u8fd4\u56de\u4e86\u591a\u65bc\u4e00\u500b\u6587\u6a94\uff0c\u800c\u60a8\u9810\u671f\u53ea\u6703\u8fd4\u56de\u4e00\u500b\u6587\u6a94\u6216\u6839\u672c\u4e0d\u8fd4\u56de\u6587\u6a94\u3002\u7576\u60a8\u4f7f\u7528 findOne()<\/code> \u6216 find()<\/code> \u7b49\u65b9\u6cd5\uff0c\u4e26\u4e14\u67e5\u8a62\u5339\u914d\u591a\u500b\u6587\u6a94\u6642\uff0c\u5c31\u6703\u767c\u751f\u6b64\u932f\u8aa4\u3002<\/p>\n

\u4f8b\u5982\uff0c\u5047\u8a2d\u60a8\u6709\u4e00\u500b\u540d\u70ba “users” \u7684\u96c6\u5408\uff0c\u6587\u6a94\u4e2d\u6709\u4e00\u500b “username” \u5b57\u6bb5\u3002\u5982\u679c\u60a8\u57f7\u884c\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n

db.users.findOne({ username: \"john\" })\r\n<\/code><\/pre>\n
\u5982\u679c\u6709\u591a\u500b\u6587\u6a94\u7684\u7528\u6236\u540d\u70ba “john”\uff0cMongoDB \u5c07\u62cb\u51fa TooManyMatchingDocuments \u932f\u8aa4\u3002<\/p>\n
\u4fee\u5fa9 MongoDB \u932f\u8aa4\u4ee3\u78bc – 170 – TooManyMatchingDocuments<\/h2>\n
\u8981\u4fee\u5fa9\u6b64\u932f\u8aa4\uff0c\u6839\u64da\u60a8\u7684\u5177\u9ad4\u4f7f\u7528\u60c5\u6cc1\uff0c\u60a8\u6709\u5e7e\u500b\u9078\u64c7\uff1a<\/p>\n
1. \u7cbe\u7149\u60a8\u7684\u67e5\u8a62<\/h3>\n
\u6700\u76f4\u63a5\u7684\u89e3\u6c7a\u65b9\u6848\u662f\u7cbe\u7149\u60a8\u7684\u67e5\u8a62\uff0c\u4ee5\u78ba\u4fdd\u5b83\u53ea\u8fd4\u56de\u4e00\u500b\u6587\u6a94\u6216\u6839\u672c\u4e0d\u8fd4\u56de\u6587\u6a94\u3002\u60a8\u53ef\u4ee5\u901a\u904e\u5411\u67e5\u8a62\u6dfb\u52a0\u66f4\u5177\u9ad4\u7684\u689d\u4ef6\u4f86\u7e2e\u5c0f\u7d50\u679c\u7bc4\u570d\u3002<\/p>\n
\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u60f3\u627e\u5230\u7528\u6236\u540d\u70ba “john” \u4e14\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u70ba “john@example.com” \u7684\u7528\u6236\uff0c\u60a8\u53ef\u4ee5\u9019\u6a23\u4fee\u6539\u67e5\u8a62\uff1a<\/p>\n
db.users.findOne({ username: \"john\", email: \"john@example.com\" })\r\n<\/code><\/pre>\n
\u9019\u5c07\u78ba\u4fdd\u5982\u679c\u5b58\u5728\uff0c\u5247\u53ea\u8fd4\u56de\u4e00\u500b\u6587\u6a94\u3002<\/p>\n
2. \u4f7f\u7528 $limit \u64cd\u4f5c\u7b26<\/h3>\n
\u5982\u679c\u60a8\u4f7f\u7528 find()<\/code> \u65b9\u6cd5\u4e26\u9810\u671f\u591a\u500b\u6587\u6a94\uff0c\u4f46\u5e0c\u671b\u5c07\u7d50\u679c\u9650\u5236\u70ba\u4e00\u500b\u6587\u6a94\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 $limit<\/code> \u64cd\u4f5c\u7b26\u3002<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n
db.users.find({ username: \"john\" }).limit(1)\r\n<\/code><\/pre>\n
\u6b64\u67e5\u8a62\u5c07\u50c5\u8fd4\u56de\u7b26\u5408\u689d\u4ef6\u7684\u7b2c\u4e00\u500b\u6587\u6a94\u3002<\/p>\n
3. \u4f7f\u7528 $aggregate \u7ba1\u9053<\/h3>\n
\u5982\u679c\u60a8\u9700\u8981\u5c0d\u5339\u914d\u7684\u6587\u6a94\u57f7\u884c\u66f4\u8907\u96dc\u7684\u64cd\u4f5c\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 $aggregate<\/code> \u7ba1\u9053\u4f86\u904e\u6ffe\u548c\u64cd\u4f5c\u7d50\u679c\u3002<\/p>\n
\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u60f3\u6839\u64da\u6642\u9593\u6233\u5b57\u6bb5\u627e\u5230\u7528\u6236\u540d\u70ba “john” \u7684\u6700\u65b0\u6587\u6a94\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7ba1\u9053\uff1a<\/p>\n
db.users.aggregate([\r\n  { $match: { username: \"john\" } },\r\n  { $sort: { timestamp: -1 } },\r\n  { $limit: 1 }\r\n])\r\n<\/code><\/pre>\n
\u6b64\u7ba1\u9053\u5c07\u9996\u5148\u904e\u6ffe\u7528\u6236\u540d\u70ba “john” \u7684\u6587\u6a94\uff0c\u7136\u5f8c\u6839\u64da\u6642\u9593\u6233\u5b57\u6bb5\u6309\u964d\u5e8f\u6392\u5e8f\uff0c\u6700\u5f8c\u5c07\u7d50\u679c\u9650\u5236\u70ba\u4e00\u500b\u6587\u6a94\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u7e3d\u4e4b\uff0cMongoDB \u932f\u8aa4\u4ee3\u78bc – 170 – TooManyMatchingDocuments \u767c\u751f\u5728\u67e5\u8a62\u8fd4\u56de\u591a\u65bc\u4e00\u500b\u6587\u6a94\uff0c\u800c\u60a8\u9810\u671f\u53ea\u6703\u8fd4\u56de\u4e00\u500b\u6587\u6a94\u6216\u6839\u672c\u4e0d\u8fd4\u56de\u6587\u6a94\u3002\u8981\u4fee\u5fa9\u6b64\u932f\u8aa4\uff0c\u60a8\u53ef\u4ee5\u7cbe\u7149\u67e5\u8a62\u3001\u4f7f\u7528 $limit \u64cd\u4f5c\u7b26\uff0c\u6216\u5229\u7528 $aggregate \u7ba1\u9053\u9032\u884c\u66f4\u8907\u96dc\u7684\u64cd\u4f5c\u3002<\/p>\n
\u5982\u679c\u60a8\u9047\u5230\u6b64\u932f\u8aa4\u6216\u9700\u8981\u6709\u95dc MongoDB \u6216 VPS \u4e3b\u6a5f\u7684\u5e6b\u52a9\uff0c\u8003\u616e\u806f\u7e6b Server.HK<\/a>\u3002\u4ed6\u5011\u63d0\u4f9b\u53ef\u9760\u4e14\u9ad8\u6027\u80fd\u7684 VPS \u4e3b\u6a5f\u89e3\u6c7a\u65b9\u6848\uff0c\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u4fee\u5fa9 MongoDB \u932f\u8aa4\u4ee3...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-21756","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21756","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=21756"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21756\/revisions"}],"predecessor-version":[{"id":23629,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21756\/revisions\/23629"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21756"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21756"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21756"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}