{"id":175785,"date":"2024-11-08T08:58:17","date_gmt":"2024-11-08T00:58:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/175785\/"},"modified":"2024-11-08T08:58:18","modified_gmt":"2024-11-08T00:58:18","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-171-%e7%84%a1%e6%b3%95%e7%b4%a2%e5%bc%95%e4%b8%a6%e8%a1%8c%e6%95%b8%e7%b5%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/175785\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MongoDB\u932f\u8aa4\u4ee3\u78bc &#8211; 171 &#8211; \u7121\u6cd5\u7d22\u5f15\u4e26\u884c\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-171-%e7%84%a1%e6%b3%95%e7%b4%a2%e5%bc%95%e4%b8%a6%e8%a1%8c%e6%95%b8%e7%b5%84-POjBVHqsap\">\u5982\u4f55\u4fee\u5fa9MongoDB\u932f\u8aa4\u4ee3\u78bc &#8211; 171 &#8211; \u7121\u6cd5\u7d22\u5f15\u4e26\u884c\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\u78bc171\uff0c\u8a72\u932f\u8aa4\u901a\u5e38\u986f\u793a\u70ba\u201c\u7121\u6cd5\u7d22\u5f15\u4e26\u884c\u6578\u7d44\u201d\u3002\u9019\u500b\u554f\u984c\u4e3b\u8981\u51fa\u73fe\u5728\u5617\u8a66\u5c0d\u5305\u542b\u6578\u7d44\u7684\u6587\u6a94\u9032\u884c\u7d22\u5f15\u6642\uff0c\u7279\u5225\u662f\u7576\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u4e0d\u7b26\u5408\u7d22\u5f15\u8981\u6c42\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%bc171%e7%9a%84%e5%8e%9f%e5%9b%a0-POjBVHqsap\">\u932f\u8aa4\u4ee3\u78bc171\u7684\u539f\u56e0<\/h2>\n<p>MongoDB\u7684\u6578\u7d44\u7d22\u5f15\u5141\u8a31\u958b\u767c\u8005\u5c0d\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u9032\u884c\u67e5\u8a62\u548c\u6392\u5e8f\u3002\u7136\u800c\uff0c\u7576\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u4e0d\u4e00\u81f4\u6216\u4e0d\u7b26\u5408\u7d22\u5f15\u7684\u8981\u6c42\u6642\uff0c\u5c31\u6703\u51fa\u73fe\u932f\u8aa4\u4ee3\u78bc171\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u53ef\u80fd\u5c0e\u81f4\u6b64\u932f\u8aa4\u7684\u539f\u56e0\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u7d44\u5143\u7d20\u985e\u578b\u4e0d\u4e00\u81f4\uff1a<\/strong>\u5982\u679c\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u985e\u578b\u4e0d\u4e00\u81f4\uff0c\u4f8b\u5982\u540c\u4e00\u6578\u7d44\u4e2d\u540c\u6642\u5305\u542b\u5b57\u7b26\u4e32\u548c\u6578\u5b57\uff0c\u5247\u53ef\u80fd\u6703\u5c0e\u81f4\u7d22\u5f15\u5931\u6557\u3002<\/li>\n<li><strong>\u7d22\u5f15\u8a2d\u7f6e\u4e0d\u6b63\u78ba\uff1a<\/strong>\u5728\u5275\u5efa\u7d22\u5f15\u6642\uff0c\u5982\u679c\u6307\u5b9a\u7684\u5b57\u6bb5\u4e0d\u6b63\u78ba\u6216\u4e0d\u7b26\u5408MongoDB\u7684\u7d22\u5f15\u8981\u6c42\uff0c\u4e5f\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u6578\u64da\u7d50\u69cb\u554f\u984c\uff1a<\/strong>\u5982\u679c\u6587\u6a94\u7684\u6578\u64da\u7d50\u69cb\u4e0d\u7b26\u5408MongoDB\u7684\u8981\u6c42\uff0c\u4f8b\u5982\u5d4c\u5957\u6578\u7d44\u6216\u4e0d\u898f\u7bc4\u7684\u6578\u64da\u683c\u5f0f\uff0c\u5247\u53ef\u80fd\u6703\u51fa\u73fe\u554f\u984c\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%bc171-POjBVHqsap\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa4\u4ee3\u78bc171<\/h2>\n<p>\u4fee\u5fa9MongoDB\u932f\u8aa4\u4ee3\u78bc171\u7684\u904e\u7a0b\u901a\u5e38\u6d89\u53ca\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e6%95%b8%e7%b5%84%e5%85%83%e7%b4%a0%e9%a1%9e%e5%9e%8b-POjBVHqsap\">1. \u6aa2\u67e5\u6578\u7d44\u5143\u7d20\u985e\u578b<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u5c0e\u81f4\u932f\u8aa4\u7684\u6578\u7d44\uff0c\u78ba\u4fdd\u6240\u6709\u5143\u7d20\u7684\u985e\u578b\u4e00\u81f4\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u6aa2\u67e5\u6578\u7d44\u4e2d\u7684\u5143\u7d20\u985e\u578b\uff1a<\/p>\n<pre><code>db.collection.find({ \"arrayField\": { $exists: true } }).forEach(function(doc) {\n    print(typeof doc.arrayField[0]);\n});<\/code><\/pre>\n<p>\u5982\u679c\u767c\u73fe\u6578\u7d44\u4e2d\u5b58\u5728\u4e0d\u540c\u985e\u578b\u7684\u5143\u7d20\uff0c\u5247\u9700\u8981\u9032\u884c\u6578\u64da\u6e05\u7406\uff0c\u78ba\u4fdd\u6240\u6709\u5143\u7d20\u7684\u985e\u578b\u4e00\u81f4\u3002<\/p>\n<h3 id=\"2-%e9%87%8d%e6%96%b0%e8%a8%ad%e7%bd%ae%e7%b4%a2%e5%bc%95-POjBVHqsap\">2. \u91cd\u65b0\u8a2d\u7f6e\u7d22\u5f15<\/h3>\n<p>\u5982\u679c\u7d22\u5f15\u8a2d\u7f6e\u4e0d\u6b63\u78ba\uff0c\u5247\u9700\u8981\u522a\u9664\u73fe\u6709\u7d22\u5f15\u4e26\u91cd\u65b0\u5275\u5efa\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u522a\u9664\u7d22\u5f15\uff1a<\/p>\n<pre><code>db.collection.dropIndex(\"indexName\");<\/code><\/pre>\n<p>\u7136\u5f8c\uff0c\u6839\u64da\u9700\u8981\u91cd\u65b0\u5275\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre><code>db.collection.createIndex({ \"arrayField\": 1 });<\/code><\/pre>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e6%95%b8%e6%93%9a%e7%b5%90%e6%a7%8b-POjBVHqsap\">3. \u6aa2\u67e5\u6578\u64da\u7d50\u69cb<\/h3>\n<p>\u78ba\u4fdd\u6587\u6a94\u7684\u6578\u64da\u7d50\u69cb\u7b26\u5408MongoDB\u7684\u8981\u6c42\u3002\u907f\u514d\u4f7f\u7528\u5d4c\u5957\u6578\u7d44\uff0c\u4e26\u78ba\u4fdd\u6240\u6709\u5b57\u6bb5\u90fd\u6b63\u78ba\u8a2d\u7f6e\u3002\u5982\u679c\u9700\u8981\uff0c\u53ef\u4ee5\u8003\u616e\u91cd\u69cb\u6578\u64da\u6a21\u578b\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b-POjBVHqsap\">\u793a\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cusers\u201d\u7684\u96c6\u5408\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u500b\u540d\u70ba\u201ctags\u201d\u7684\u6578\u7d44\u5b57\u6bb5\u3002\u5982\u679c\u201ctags\u201d\u6578\u7d44\u4e2d\u540c\u6642\u5305\u542b\u5b57\u7b26\u4e32\u548c\u6578\u5b57\uff0c\u5247\u53ef\u80fd\u6703\u5c0e\u81f4\u932f\u8aa4171\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u6aa2\u67e5\u548c\u4fee\u5fa9\u9019\u500b\u554f\u984c\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>db.users.find().forEach(function(user) {\n    if (user.tags.some(tag =&gt; typeof tag !== 'string')) {\n        print(\"User ID: \" + user._id + \" has invalid tags.\");\n    }\n});<\/code><\/pre>\n<p>\u5728\u767c\u73fe\u554f\u984c\u5f8c\uff0c\u53ef\u4ee5\u901a\u904e\u66f4\u65b0\u6587\u6a94\u4f86\u6e05\u7406\u6578\u64da\uff1a<\/p>\n<pre><code>db.users.updateMany(\n    { \"tags\": { $elemMatch: { $not: { $type: \"string\" } } } },\n    { $set: { \"tags\": [\"defaultTag\"] } }\n);<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-POjBVHqsap\">\u7e3d\u7d50<\/h2>\n<p>MongoDB\u932f\u8aa4\u4ee3\u78bc171\u901a\u5e38\u662f\u7531\u65bc\u6578\u7d44\u5143\u7d20\u985e\u578b\u4e0d\u4e00\u81f4\u3001\u7d22\u5f15\u8a2d\u7f6e\u4e0d\u6b63\u78ba\u6216\u6578\u64da\u7d50\u69cb\u554f\u984c\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5\u6578\u7d44\u5143\u7d20\u985e\u578b\u3001\u91cd\u65b0\u8a2d\u7f6e\u7d22\u5f15\u4ee5\u53ca\u78ba\u4fdd\u6578\u64da\u7d50\u69cb\u7b26\u5408\u8981\u6c42\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u5b58\u5132\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u60a8\u7684MongoDB\u6578\u64da\u5eab\u904b\u884c\u9806\u5229\uff0c\u4e26\u907f\u514d\u985e\u4f3c\u7684\u554f\u984c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4fee\u5fa9MongoDB\u932f\u8aa4\u4ee3\u78bc171\uff0c\u89e3\u6c7a\u7121\u6cd5\u7d22\u5f15\u4e26\u884c\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-175785","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175785","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=175785"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175785\/revisions"}],"predecessor-version":[{"id":175786,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175785\/revisions\/175786"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=175785"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=175785"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=175785"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}