{"id":176087,"date":"2024-11-08T09:58:17","date_gmt":"2024-11-08T01:58:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/176087\/"},"modified":"2024-11-08T09:58:18","modified_gmt":"2024-11-08T01:58:18","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mongodb%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc-52-%e4%bb%a5%e7%be%8e%e5%85%83%e7%ac%a6%e8%99%9f%e7%82%ba%e5%89%8d%e7%b6%b4%e7%9a%84%e5%ad%97%e6%ae%b5%e5%90%8d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/176087\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MongoDB\u932f\u8aa4\u4ee3\u78bc – 52 – \u4ee5\u7f8e\u5143\u7b26\u865f\u70ba\u524d\u7db4\u7684\u5b57\u6bb5\u540d"},"content":{"rendered":"

\u5982\u4f55\u4fee\u5fa9MongoDB\u932f\u8aa4\u4ee3\u78bc – 52 – \u4ee5\u7f8e\u5143\u7b26\u865f\u70ba\u524d\u7db4\u7684\u5b57\u6bb5\u540d<\/h1>\n

\u5728\u4f7f\u7528MongoDB\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa4\u4ee3\u78bc52\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8207\u4ee5\u7f8e\u5143\u7b26\u865f\uff08$\uff09\u70ba\u524d\u7db4\u7684\u5b57\u6bb5\u540d\u6709\u95dc\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406MongoDB\u6578\u64da\u5eab\u3002<\/p>\n

\u932f\u8aa4\u4ee3\u78bc52\u7684\u539f\u56e0<\/h2>\n

MongoDB\u4e2d\u7684\u932f\u8aa4\u4ee3\u78bc52\u901a\u5e38\u51fa\u73fe\u5728\u5617\u8a66\u4f7f\u7528\u4ee5\u7f8e\u5143\u7b26\u865f\u70ba\u524d\u7db4\u7684\u5b57\u6bb5\u540d\u6642\u3002\u6839\u64daMongoDB\u7684\u898f\u7bc4\uff0c\u67d0\u4e9b\u64cd\u4f5c\uff08\u5982\u67e5\u8a62\u3001\u66f4\u65b0\u7b49\uff09\u4e0d\u5141\u8a31\u4f7f\u7528\u4ee5\u7f8e\u5143\u7b26\u865f\u958b\u982d\u7684\u5b57\u6bb5\u540d\uff0c\u56e0\u70ba\u9019\u4e9b\u5b57\u6bb5\u540d\u88ab\u4fdd\u7559\u7528\u65bc\u7279\u5b9a\u7684\u64cd\u4f5c\u7b26\u548c\u529f\u80fd\u3002\u4f8b\u5982\uff0c$set\u3001$unset\u7b49\u64cd\u4f5c\u7b26\u90fd\u662f\u4ee5\u7f8e\u5143\u7b26\u865f\u958b\u982d\u7684\u3002<\/p>\n

\u7576\u958b\u767c\u8005\u5728\u6578\u64da\u6a21\u578b\u4e2d\u4e0d\u5c0f\u5fc3\u4f7f\u7528\u4e86\u9019\u4e9b\u4fdd\u7559\u5b57\u6bb5\u540d\u6642\uff0c\u5c31\u6703\u5c0e\u81f4\u932f\u8aa4\u4ee3\u78bc52\u7684\u51fa\u73fe\u3002\u9019\u4e0d\u50c5\u5f71\u97ff\u4e86\u6578\u64da\u7684\u5b58\u53d6\uff0c\u9084\u53ef\u80fd\u5c0e\u81f4\u61c9\u7528\u7a0b\u5e8f\u7684\u5d29\u6f70\u6216\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/p>\n

\u5982\u4f55\u4fee\u5fa9\u932f\u8aa4\u4ee3\u78bc52<\/h2>\n

\u4fee\u5fa9\u932f\u8aa4\u4ee3\u78bc52\u7684\u95dc\u9375\u5728\u65bc\u6aa2\u67e5\u548c\u4fee\u6539\u6578\u64da\u6a21\u578b\u4e2d\u7684\u5b57\u6bb5\u540d\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5177\u9ad4\u7684\u6b65\u9a5f\u548c\u5efa\u8b70\uff1a<\/p>\n

1. \u6aa2\u67e5\u5b57\u6bb5\u540d<\/h3>\n

\u9996\u5148\uff0c\u6aa2\u67e5\u4f60\u7684\u6578\u64da\u6a21\u578b\uff0c\u78ba\u4fdd\u6c92\u6709\u4f7f\u7528\u4ee5\u7f8e\u5143\u7b26\u865f\u958b\u982d\u7684\u5b57\u6bb5\u540d\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u78bc\u7247\u6bb5\u4f86\u67e5\u8a62\u6240\u6709\u5b57\u6bb5\u540d\uff1a<\/p>\n

db.collection.find({}, { $where: function() { \n    for (var key in this) { \n        if (key.startsWith('$')) { \n            return true; \n        } \n    } \n    return false; \n}})<\/code><\/pre>\n
\u9019\u6bb5\u4ee3\u78bc\u5c07\u8fd4\u56de\u6240\u6709\u5305\u542b\u4ee5\u7f8e\u5143\u7b26\u865f\u958b\u982d\u5b57\u6bb5\u7684\u6587\u6a94\uff0c\u5e6b\u52a9\u4f60\u5feb\u901f\u5b9a\u4f4d\u554f\u984c\u3002<\/p>\n
2. \u4fee\u6539\u5b57\u6bb5\u540d<\/h3>\n
\u4e00\u65e6\u627e\u5230\u4ee5\u7f8e\u5143\u7b26\u865f\u958b\u982d\u7684\u5b57\u6bb5\u540d\uff0c\u63a5\u4e0b\u4f86\u7684\u6b65\u9a5f\u662f\u4fee\u6539\u9019\u4e9b\u5b57\u6bb5\u540d\u3002\u53ef\u4ee5\u4f7f\u7528MongoDB\u7684\u66f4\u65b0\u64cd\u4f5c\u4f86\u91cd\u547d\u540d\u5b57\u6bb5\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u4f60\u6709\u4e00\u500b\u5b57\u6bb5\u540d\u70ba$price\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u78bc\u5c07\u5176\u91cd\u547d\u540d\u70baprice\uff1a<\/p>\n
db.collection.updateMany(\n    { \"$exists\": true },\n    { \"$rename\": { \"$price\": \"price\" } }\n)<\/code><\/pre>\n
\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u4f60\u7684\u6578\u64da\u6a21\u578b\u7b26\u5408MongoDB\u7684\u898f\u7bc4\uff0c\u907f\u514d\u672a\u4f86\u51fa\u73fe\u985e\u4f3c\u7684\u932f\u8aa4\u3002<\/p>\n
3. \u6e2c\u8a66\u548c\u9a57\u8b49<\/h3>\n
\u5728\u4fee\u6539\u5b57\u6bb5\u540d\u5f8c\uff0c\u52d9\u5fc5\u9032\u884c\u6e2c\u8a66\u4ee5\u78ba\u4fdd\u61c9\u7528\u7a0b\u5e8f\u7684\u6b63\u5e38\u904b\u884c\u3002\u53ef\u4ee5\u901a\u904e\u57f7\u884c\u4e00\u4e9b\u57fa\u672c\u7684\u67e5\u8a62\u548c\u66f4\u65b0\u64cd\u4f5c\u4f86\u9a57\u8b49\u662f\u5426\u9084\u6703\u51fa\u73fe\u932f\u8aa4\u4ee3\u78bc52\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u932f\u8aa4\u4ee3\u78bc52\u662fMongoDB\u4e2d\u5e38\u898b\u7684\u554f\u984c\uff0c\u4e3b\u8981\u7531\u65bc\u4f7f\u7528\u4e86\u4ee5\u7f8e\u5143\u7b26\u865f\u70ba\u524d\u7db4\u7684\u5b57\u6bb5\u540d\u6240\u5f15\u8d77\u3002\u901a\u904e\u6aa2\u67e5\u5b57\u6bb5\u540d\u3001\u4fee\u6539\u4e0d\u5408\u898f\u7684\u5b57\u6bb5\u4ee5\u53ca\u9032\u884c\u5145\u5206\u7684\u6e2c\u8a66\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u9019\u4e00\u932f\u8aa4\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u904b\u884c\u7684\u61c9\u7528\u7a0b\u5e8f\u4f86\u8aaa\uff0c\u9075\u5faaMongoDB\u7684\u547d\u540d\u898f\u7bc4\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n
\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u4f86\u6258\u7ba1\u4f60\u7684MongoDB\u6578\u64da\u5eab\uff0c\u78ba\u4fdd\u4f60\u7684\u61c9\u7528\u7a0b\u5e8f\u80fd\u5920\u7a69\u5b9a\u904b\u884c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2\u5982\u4f55\u4fee\u5fa9MongoDB\u932f\u8aa4\u4ee3\u78bc52\uff0c\u89e3\u6c7a\u4ee5\u7f8e\u5143\u7b26\u865f\u70ba\u524d\u7db4\u7684\u5b57\u6bb5\u540d\u554f\u984c\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u6b63\u5e38\u904b\u884c\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-176087","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/176087","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=176087"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/176087\/revisions"}],"predecessor-version":[{"id":176088,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/176087\/revisions\/176088"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=176087"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=176087"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=176087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}