{"id":743,"date":"2019-04-08T23:22:25","date_gmt":"2019-04-08T15:22:25","guid":{"rendered":"https:\/\/wyxxt.org.cn\/?p=743"},"modified":"2023-12-04T16:45:57","modified_gmt":"2023-12-04T08:45:57","slug":"mongodb%e7%b4%a2%e5%bc%95-%e5%88%9b%e5%bb%ba%e3%80%81%e6%9f%a5%e7%9c%8b%e3%80%81%e5%88%a0%e9%99%a4","status":"publish","type":"post","link":"https:\/\/wyxxt.org.cn\/?p=743","title":{"rendered":"mongodb\u7d22\u5f15-\u521b\u5efa\u3001\u67e5\u770b\u3001\u5220\u9664"},"content":{"rendered":"

\u521b\u5efa\u7d22\u5f15<\/h2>\n
db.COLLECTION_NAME.ensureIndex(keys[,options])\n\ndb.test.ensureIndex({name: 1, domain: -1})\n<\/code><\/pre>\n
    \n
  • keys\uff0c\u8981\u5efa\u7acb\u7d22\u5f15\u7684\u53c2\u6570\u5217\u8868\u3002\u5982\uff1a{key:1}\uff0c\u5176\u4e2dkey\u8868\u793a\u5b57\u6bb5\u540d\uff0c1\u8868\u793a\u5347\u5e8f\u6392\u5e8f\uff0c\u4e5f\u53ef\u4f7f\u7528\u4f7f\u7528\u6570\u5b57-1\u964d\u5e8f\u3002
    \n\"\"<\/li>\n<\/ul>\n
    \u91cd\u5efa\u7d22\u5f15 (\u5220\u9664\u5b57\u6bb5\u4e0a\u539f\u6709\u7d22\u5f15\uff0c\u65b0\u5efa)<\/h2>\n
    db.test.reIndex()\n<\/code><\/pre>\n
    \"\"<\/p>\n
    \u67e5\u770b\u7d22\u5f15<\/h2>\n
    db.test.getIndexes()\n<\/code><\/pre>\n
    \"\"<\/p>\n
    \u67e5\u770b\u96c6\u5408\u4e2d\u7d22\u5f15\u5927\u5c0f<\/h2>\n
    db.test.totalIndexSize()\n<\/code><\/pre>\n
    \"\"<\/p>\n
    \u67e5\u770b\u6570\u636e\u5e93\u4e2d\u6240\u6709\u7d22\u5f15<\/h2>\n
    db.system.indexes.find()\n<\/code><\/pre>\n
    \u5220\u9664\u7d22\u5f15<\/h2>\n
    db.test.dropIndex(\"name_1_domain_-1\")\n<\/code><\/pre>\n
    \"\"<\/p>\n
    \u67e5\u770b\u7d22\u5f15\u952e<\/h2>\n
    db.test.getIndexKeys()\n<\/code><\/pre>\n
    \"\"<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u521b\u5efa\u7d22\u5f15 db.COLLECTION_NAME.ensureIndex(keys[,options]) db. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[15],"tags":[393],"class_list":["post-743","post","type-post","status-publish","format-standard","hentry","category-15","tag-393"],"_links":{"self":[{"href":"https:\/\/wyxxt.org.cn\/index.php?rest_route=\/wp\/v2\/posts\/743","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wyxxt.org.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wyxxt.org.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wyxxt.org.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wyxxt.org.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=743"}],"version-history":[{"count":4,"href":"https:\/\/wyxxt.org.cn\/index.php?rest_route=\/wp\/v2\/posts\/743\/revisions"}],"predecessor-version":[{"id":747,"href":"https:\/\/wyxxt.org.cn\/index.php?rest_route=\/wp\/v2\/posts\/743\/revisions\/747"}],"wp:attachment":[{"href":"https:\/\/wyxxt.org.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=743"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wyxxt.org.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=743"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wyxxt.org.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=743"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}