{"id":184935,"date":"2023-07-20T12:48:51","date_gmt":"2023-07-20T04:48:51","guid":{"rendered":"http:\/\/www.idc.net\/help\/184935\/"},"modified":"2023-07-20T12:48:51","modified_gmt":"2023-07-20T04:48:51","slug":"%e5%90%8e%e6%b5%aa%e4%ba%91%e5%b0%8f%e7%a8%8b%e5%ba%8f%e6%95%99%e7%a8%8b%ef%bc%9asdk%e6%95%b0%e6%8d%ae%e5%ba%93-aggregate%c2%b7%e9%9a%8f%e6%9c%ba%e9%80%89%e5%ae%9a%e8%ae%b0%e5%bd%95","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/184935\/","title":{"rendered":"\u540e\u6d6a\u4e91\u5c0f\u7a0b\u5e8f\u6559\u7a0b\uff1aSDK\u6570\u636e\u5e93 Aggregate\u00b7\u968f\u673a\u9009\u5b9a\u8bb0\u5f55"},"content":{"rendered":"<h2>Aggregate.sample(size: number):&nbsp;Aggregate<\/h2>\n<blockquote><p>\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4,&nbsp;\u4e91\u51fd\u6570 0.8.1,&nbsp;Web\n<\/p><\/blockquote>\n<p>\u805a\u5408\u9636\u6bb5\u3002\u968f\u673a\u4ece\u6587\u6863\u4e2d\u9009\u53d6\u6307\u5b9a\u6570\u91cf\u7684\u8bb0\u5f55\u3002<\/p>\n<h2>\u53c2\u6570<\/h2>\n<h3>size: number<\/h3>\n<h2>\u8fd4\u56de\u503c<\/h2>\n<h3>Aggregate<\/h3>\n<h2>API \u8bf4\u660e<\/h2>\n<p>sample&nbsp;\u7684\u5f62\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre><code>sample({\n    size: &lt;\u6b63\u6574\u6570&gt;\n})\n<\/code><\/pre>\n<p>\u8bf7\u6ce8\u610f\uff1asize&nbsp;\u662f\u6b63\u6574\u6570\uff0c\u5426\u5219\u4f1a\u51fa\u9519\u3002<\/p>\n<h2>\u793a\u4f8b<\/h2>\n<p>\u5047\u8bbe\u6587\u6863&nbsp;users&nbsp;\u6709\u4ee5\u4e0b\u8bb0\u5f55\uff1a<\/p>\n<pre><code>{ \"name\": \"a\" }\n{ \"name\": \"b\" }\n<\/code><\/pre>\n<h4>\u968f\u673a\u9009\u53d6<\/h4>\n<p>\u5982\u679c\u73b0\u5728\u8fdb\u884c\u62bd\u5956\u6d3b\u52a8\uff0c\u9700\u8981\u9009\u51fa\u4e00\u540d\u5e78\u8fd0\u7528\u6237\u3002\u90a3\u4e48&nbsp;sample&nbsp;\u7684\u8c03\u7528\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre><code>db.collection('users')\n  .aggregate()\n  .sample({\n    size: 1\n  })\n  .end()\n<\/code><\/pre>\n<p>\u8fd4\u56de\u4e86\u968f\u673a\u9009\u4e2d\u7684\u4e00\u4e2a\u7528\u6237\u5bf9\u5e94\u7684\u8bb0\u5f55\uff0c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n<pre><code>{ \"_id\": \"696529e4-7e82-4e7f-812e-5144714edff6\", \"name\": \"b\" }<\/code><\/pre>\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aggregate.sample(size: number):&nbsp;Aggregate \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[182398],"tags":[],"class_list":["post-184935","post","type-post","status-publish","format-standard","hentry","category-mini-program"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/184935","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=184935"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/184935\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=184935"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=184935"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=184935"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}