{"id":176049,"date":"2024-11-08T09:39:19","date_gmt":"2024-11-08T01:39:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/176049\/"},"modified":"2024-11-08T09:39:20","modified_gmt":"2024-11-08T01:39:20","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-34-%e7%84%a1%e6%b3%95%e5%9b%9e%e5%a1%ab%e6%95%b8%e7%b5%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/176049\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MongoDB\u932f\u8aa4\u4ee3\u78bc &#8211; 34 &#8211; \u7121\u6cd5\u56de\u586b\u6578\u7d44"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mongodb%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc-34-%e7%84%a1%e6%b3%95%e5%9b%9e%e5%a1%ab%e6%95%b8%e7%b5%84-CtYneDYeTS\">\u5982\u4f55\u4fee\u5fa9MongoDB\u932f\u8aa4\u4ee3\u78bc &#8211; 34 &#8211; \u7121\u6cd5\u56de\u586b\u6578\u7d44<\/h1>\n<p>\u5728\u4f7f\u7528MongoDB\u7684\u904e\u7a0b\u4e2d\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\u78bc &#8211; 34\uff0c\u8a72\u932f\u8aa4\u901a\u5e38\u986f\u793a\u70ba\u201c\u7121\u6cd5\u56de\u586b\u6578\u7d44\u201d\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8207\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u7684\u6578\u7d44\u5b57\u6bb5\u6709\u95dc\uff0c\u7279\u5225\u662f\u5728\u9032\u884c\u66f4\u65b0\u6216\u63d2\u5165\u64cd\u4f5c\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc-34-%e7%9a%84%e5%8e%9f%e5%9b%a0-CtYneDYeTS\">\u932f\u8aa4\u4ee3\u78bc &#8211; 34 \u7684\u539f\u56e0<\/h2>\n<p>\u932f\u8aa4\u4ee3\u78bc &#8211; 34 \u901a\u5e38\u51fa\u73fe\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u7576\u4f60\u5617\u8a66\u5c07\u4e00\u500b\u975e\u6578\u7d44\u985e\u578b\u7684\u6578\u64da\u63d2\u5165\u5230\u4e00\u500b\u671f\u671b\u6578\u7d44\u7684\u5b57\u6bb5\u6642\uff0cMongoDB\u6703\u5831\u544a\u6b64\u932f\u8aa4\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u5617\u8a66\u5c07\u4e00\u500b\u5b57\u7b26\u4e32\u63d2\u5165\u5230\u4e00\u500b\u6578\u7d44\u5b57\u6bb5\u4e2d\uff0c\u5247\u6703\u51fa\u73fe\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u6578\u7d44\u64cd\u4f5c\u4e0d\u7576\uff1a<\/strong>\u5728\u4f7f\u7528MongoDB\u7684\u66f4\u65b0\u64cd\u4f5c\u6642\uff0c\u82e5\u4f7f\u7528\u4e86\u4e0d\u6b63\u78ba\u7684\u64cd\u4f5c\u7b26\uff08\u5982$push\u3001$addToSet\u7b49\uff09\uff0c\u4e5f\u53ef\u80fd\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u6587\u6a94\u7d50\u69cb\u4e0d\u4e00\u81f4\uff1a<\/strong>\u5982\u679c\u6578\u64da\u5eab\u4e2d\u7684\u67d0\u4e9b\u6587\u6a94\u7d50\u69cb\u4e0d\u4e00\u81f4\uff0c\u4f8b\u5982\u67d0\u4e9b\u6587\u6a94\u5305\u542b\u6578\u7d44\u800c\u5176\u4ed6\u6587\u6a94\u4e0d\u5305\u542b\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u5728\u67e5\u8a62\u6216\u66f4\u65b0\u6642\u51fa\u73fe\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc-34-CtYneDYeTS\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa4\u4ee3\u78bc &#8211; 34<\/h2>\n<p>\u4fee\u5fa9\u6b64\u932f\u8aa4\u7684\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-CtYneDYeTS\">1. \u6aa2\u67e5\u6578\u64da\u985e\u578b<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u4f60\u8981\u63d2\u5165\u6216\u66f4\u65b0\u7684\u6578\u64da\u985e\u578b\u3002\u78ba\u4fdd\u4f60\u63d2\u5165\u7684\u6578\u64da\u8207\u6578\u7d44\u5b57\u6bb5\u7684\u985e\u578b\u76f8\u7b26\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6578\u7d44\u5b57\u6bb5\u671f\u671b\u4e00\u500b\u6578\u5b57\u6578\u7d44\uff0c\u5247\u78ba\u4fdd\u4f60\u63d2\u5165\u7684\u6578\u64da\u4e5f\u662f\u6578\u5b57\u3002<\/p>\n<pre><code>{\n    \"field\": [1, 2, 3]  \/\/ \u6b63\u78ba\u7684\u6578\u7d44\u683c\u5f0f\n}\n<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e6%ad%a3%e7%a2%ba%e7%9a%84%e6%9b%b4%e6%96%b0%e6%93%8d%e4%bd%9c%e7%ac%a6-CtYneDYeTS\">2. \u4f7f\u7528\u6b63\u78ba\u7684\u66f4\u65b0\u64cd\u4f5c\u7b26<\/h3>\n<p>\u5728\u9032\u884c\u66f4\u65b0\u64cd\u4f5c\u6642\uff0c\u78ba\u4fdd\u4f7f\u7528\u6b63\u78ba\u7684\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u4f7f\u7528$push\u4f86\u5c07\u5143\u7d20\u6dfb\u52a0\u5230\u6578\u7d44\u4e2d\uff1a<\/p>\n<pre><code>db.collection.update(\n    { \"_id\": ObjectId(\"your_id\") },\n    { \"$push\": { \"arrayField\": newValue } }\n)\n<\/code><\/pre>\n<h3 id=\"3-%e7%a2%ba%e4%bf%9d%e6%96%87%e6%aa%94%e7%b5%90%e6%a7%8b%e4%b8%80%e8%87%b4-CtYneDYeTS\">3. \u78ba\u4fdd\u6587\u6a94\u7d50\u69cb\u4e00\u81f4<\/h3>\n<p>\u6aa2\u67e5\u6578\u64da\u5eab\u4e2d\u6240\u6709\u76f8\u95dc\u6587\u6a94\u7684\u7d50\u69cb\uff0c\u78ba\u4fdd\u5b83\u5011\u7684\u4e00\u81f4\u6027\u3002\u5982\u679c\u67d0\u4e9b\u6587\u6a94\u7f3a\u5c11\u6578\u7d44\u5b57\u6bb5\uff0c\u5247\u5728\u9032\u884c\u67e5\u8a62\u6216\u66f4\u65b0\u6642\u53ef\u80fd\u6703\u5c0e\u81f4\u932f\u8aa4\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u6aa2\u67e5\u6587\u6a94\u7d50\u69cb\uff1a<\/p>\n<pre><code>db.collection.find({ \"arrayField\": { \"$exists\": false } })\n<\/code><\/pre>\n<h2 id=\"%e7%a4%ba%e4%be%8b-CtYneDYeTS\">\u793a\u4f8b<\/h2>\n<p>\u5047\u8a2d\u4f60\u6709\u4e00\u500b\u7528\u6236\u96c6\u5408\uff0c\u4e26\u4e14\u60f3\u8981\u5c07\u4e00\u500b\u65b0\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u6dfb\u52a0\u5230\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u6578\u7d44\u4e2d\u3002\u5982\u679c\u7528\u6236\u7684\u6587\u6a94\u7d50\u69cb\u5982\u4e0b\uff1a<\/p>\n<pre><code>{\n    \"_id\": ObjectId(\"user_id\"),\n    \"emails\": [\"example1@example.com\", \"example2@example.com\"]\n}\n<\/code><\/pre>\n<p>\u4f60\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u6dfb\u52a0\u65b0\u7684\u96fb\u5b50\u90f5\u4ef6\uff1a<\/p>\n<pre><code>db.users.update(\n    { \"_id\": ObjectId(\"user_id\") },\n    { \"$push\": { \"emails\": \"example3@example.com\" } }\n)\n<\/code><\/pre>\n<p>\u5982\u679c\u4f60\u5617\u8a66\u5c07\u4e00\u500b\u5b57\u7b26\u4e32\u800c\u4e0d\u662f\u6578\u7d44\u63d2\u5165\u5230\u201cemails\u201d\u5b57\u6bb5\u4e2d\uff0c\u5247\u6703\u9047\u5230\u932f\u8aa4\u4ee3\u78bc &#8211; 34\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-CtYneDYeTS\">\u7e3d\u7d50<\/h2>\n<p>\u932f\u8aa4\u4ee3\u78bc &#8211; 34 &#8211; \u7121\u6cd5\u56de\u586b\u6578\u7d44\u901a\u5e38\u662f\u7531\u65bc\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\u3001\u6578\u7d44\u64cd\u4f5c\u4e0d\u7576\u6216\u6587\u6a94\u7d50\u69cb\u4e0d\u4e00\u81f4\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5\u6578\u64da\u985e\u578b\u3001\u4f7f\u7528\u6b63\u78ba\u7684\u66f4\u65b0\u64cd\u4f5c\u7b26\u4ee5\u53ca\u78ba\u4fdd\u6587\u6a94\u7d50\u69cb\u7684\u4e00\u81f4\u6027\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u5728\u904b\u884cMongoDB\u6642\u4e0d\u6703\u9047\u5230\u6027\u80fd\u74f6\u9838\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4fee\u5fa9MongoDB\u932f\u8aa4\u4ee3\u78bc34\uff0c\u89e3\u6c7a\u7121\u6cd5\u56de\u586b\u6578\u7d44\u7684\u554f\u984c\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u8207\u7a69\u5b9a\u6027\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-176049","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/176049","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=176049"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/176049\/revisions"}],"predecessor-version":[{"id":176050,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/176049\/revisions\/176050"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=176049"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=176049"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=176049"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}