{"id":1091,"date":"2023-03-12T11:27:29","date_gmt":"2023-03-12T03:27:29","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1091"},"modified":"2023-04-29T11:28:17","modified_gmt":"2023-04-29T03:28:17","slug":"mongodb-type-operator","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/12\/mongodb-type-operator\/","title":{"rendered":"MongoDB $type\u64cd\u4f5c\u7b26"},"content":{"rendered":"

$type<\/code>\u64cd\u4f5c\u7b26\u662f\u57fa\u4e8eBSON\u7c7b\u578b\u6765\u68c0\u7d22\u96c6\u5408\u4e2d\u5339\u914d\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5e76\u8fd4\u56de\u7ed3\u679c\u3002<\/p>\n

MongoDB \u4e2d\u53ef\u4ee5\u4f7f\u7528\u7684\u7c7b\u578b\u5982\u4e0b\u8868\u6240\u793a\uff1a<\/p>\n

<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u7c7b\u578b<\/th>\n\u6570\u5b57<\/th>\n\u5907\u6ce8<\/th>\n<\/tr>\n<\/thead>\n
Double<\/td>\n1<\/td>\n<\/td>\n<\/tr>\n
String<\/td>\n2<\/td>\n<\/td>\n<\/tr>\n
Object<\/td>\n3<\/td>\n<\/td>\n<\/tr>\n
Array<\/td>\n4<\/td>\n<\/td>\n<\/tr>\n
Binary data<\/td>\n5<\/td>\n<\/td>\n<\/tr>\n
Undefined<\/td>\n6<\/td>\n\u5df2\u5e9f\u5f03<\/td>\n<\/tr>\n
Object id<\/td>\n7<\/td>\n<\/td>\n<\/tr>\n
Boolean<\/td>\n8<\/td>\n<\/td>\n<\/tr>\n
Date<\/td>\n9<\/td>\n<\/td>\n<\/tr>\n
Null<\/td>\n10<\/td>\n<\/td>\n<\/tr>\n
Regular Expression<\/td>\n11<\/td>\n<\/td>\n<\/tr>\n
JavaScript<\/td>\n13<\/td>\n<\/td>\n<\/tr>\n
Symbol<\/td>\n14<\/td>\n<\/td>\n<\/tr>\n
JavaScript (with scope)<\/td>\n15<\/td>\n<\/td>\n<\/tr>\n
32-bit integer<\/td>\n16<\/td>\n<\/td>\n<\/tr>\n
Timestamp<\/td>\n17<\/td>\n<\/td>\n<\/tr>\n
64-bit integer<\/td>\n18<\/td>\n<\/td>\n<\/tr>\n
Min key<\/td>\n255<\/td>\nQuery with -1<\/td>\n<\/tr>\n
Max key<\/td>\n127<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6211\u4eec\u4f7f\u7528\u7684\u6570\u636e\u5e93\u540d\u79f0\u4e3a "appblog"\uff0c\u96c6\u5408\u540d\u79f0\u4e3a "col"<\/p>\n

\u63d2\u5165\u4ee5\u4e0b\u6570\u636e<\/p>\n

> db.col.insert({\n    title: 'PHP', \n    description: 'PHP \u662f\u4e00\u79cd\u521b\u5efa\u52a8\u6001\u4ea4\u4e92\u6027\u7ad9\u70b9\u7684\u5f3a\u6709\u529b\u7684\u670d\u52a1\u5668\u7aef\u811a\u672c\u8bed\u8a00\u3002',\n    by: 'APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2',\n    url: 'http:\/\/www.appblog.cn',\n    tags: ['php'],\n    likes: 200\n})\n> db.col.insert({title: 'Java', \n    description: 'Java \u662f\u7531Sun\u516c\u53f8\u4e8e1995\u5e745\u6708\u63a8\u51fa\u7684\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u8bed\u8a00\u3002',\n    by: 'APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2',\n    url: 'http:\/\/www.appblog.cn',\n    tags: ['java'],\n    likes: 150\n})\n> db.col.insert({title: 'MongoDB', \n    description: 'MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93',\n    by: 'APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2',\n    url: 'http:\/\/www.appblog.cn',\n    tags: ['mongodb'],\n    likes: 100\n})<\/code><\/pre>\n
\u4f7f\u7528find()\u547d\u4ee4\u67e5\u770b\u6570\u636e\uff1a<\/p>\n
> db.col.find()\n{ "_id" : ObjectId("5aefe63c2d2577acadf1e0d2"), "title" : "PHP", "description" : "PHP \u662f\u4e00\u79cd\u521b\u5efa\u52a8\u6001\u4ea4\u4e92\u6027\u7ad9\u70b9\u7684\u5f3a\u6709\u529b\u7684\u670d\u52a1\u5668\u7aef\u811a\u672c\u8bed\u8a00\u3002", "by" : "APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2", "url" : "http:\/\/www.appblog.cn", "tags" : [ "php" ], "likes" : 200 }\n{ "_id" : ObjectId("5aefe6462d2577acadf1e0d3"), "title" : "Java", "description" : "Java \u662f\u7531Sun\u516c\u53f8\u4e8e1995\u5e745\u6708\u63a8\u51fa\u7684\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u8bed\u8a00\u3002", "by" : "APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2", "url" : "http:\/\/www.appblog.cn", "tags" : [ "java" ], "likes" : 150 }\n{ "_id" : ObjectId("5aefe64f2d2577acadf1e0d4"), "title" : "MongoDB", "description" : "MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93", "by" : "APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2", "url" : "http:\/\/www.appblog.cn", "tags" : [ "mongodb" ], "likes" : 100 }<\/code><\/pre>\n
MongoDB \u64cd\u4f5c\u7b26 – $type \u5b9e\u4f8b<\/h2>\n
\u5982\u679c\u60f3\u83b7\u53d6 "col" \u96c6\u5408\u4e2d title \u4e3a String \u7684\u6570\u636e\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n
db.col.find({"title" : {$type : 2}})<\/code><\/pre>\n
\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n
> db.col.find({"title" : {$type : 2}})\n{ "_id" : ObjectId("5aefe63c2d2577acadf1e0d2"), "title" : "PHP", "description" : "PHP \u662f\u4e00\u79cd\u521b\u5efa\u52a8\u6001\u4ea4\u4e92\u6027\u7ad9\u70b9\u7684\u5f3a\u6709\u529b\u7684\u670d\u52a1\u5668\u7aef\u811a\u672c\u8bed\u8a00\u3002", "by" : "APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2", "url" : "http:\/\/www.appblog.cn", "tags" : [ "php" ], "likes" : 200 }\n{ "_id" : ObjectId("5aefe6462d2577acadf1e0d3"), "title" : "Java", "description" : "Java \u662f\u7531Sun\u516c\u53f8\u4e8e1995\u5e745\u6708\u63a8\u51fa\u7684\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u8bed\u8a00\u3002", "by" : "APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2", "url" : "http:\/\/www.appblog.cn", "tags" : [ "java" ], "likes" : 150 }\n{ "_id" : ObjectId("5aefe64f2d2577acadf1e0d4"), "title" : "MongoDB", "description" : "MongoDB \u662f\u4e00\u4e2a Nosql \u6570\u636e\u5e93", "by" : "APP\u5f00\u53d1\u6280\u672f\u535a\u5ba2", "url" : "http:\/\/www.appblog.cn", "tags" : [ "mongodb" ], "likes" : 100 }\n> <\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
$type\u64cd\u4f5c\u7b26\u662f\u57fa\u4e8eBSON\u7c7b\u578b\u6765\u68c0\u7d22\u96c6\u5408\u4e2d\u5339\u914d\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5e76\u8fd4\u56de\u7ed3\u679c\u3002 MongoDB \u4e2d\u53ef\u4ee5\u4f7f\u7528\u7684\u7c7b\u578b\u5982 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[300],"tags":[],"class_list":["post-1091","post","type-post","status-publish","format-standard","hentry","category-mongodb"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1091","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1091"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1091\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1091"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1091"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1091"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}