{"id":2491,"date":"2025-03-09T09:34:56","date_gmt":"2025-03-09T01:34:56","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2491"},"modified":"2025-03-09T13:03:33","modified_gmt":"2025-03-09T05:03:33","slug":"mongodb-objectid-%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/09\/mongodb-objectid-%e8%af%a6%e8%a7%a3\/","title":{"rendered":"MongoDB ObjectId \u8be6\u89e3"},"content":{"rendered":"\n

1. \u4ec0\u4e48\u662f ObjectId\uff1f<\/strong><\/h2>\n\n\n\n

ObjectId<\/code> \u662f MongoDB \u6587\u6863\u7684\u9ed8\u8ba4\u552f\u4e00\u6807\u8bc6\u7b26\uff08_id<\/code>\uff09\u3002\u5b83\u662f\u4e00\u4e2a 12 \u5b57\u8282<\/strong> \u7684 BSON \u7c7b\u578b\u503c\uff0cMongoDB \u81ea\u52a8\u4e3a\u6bcf\u4e2a\u6587\u6863\u751f\u6210\u4e00\u4e2a ObjectId<\/code>\uff0c\u4f46\u7528\u6237\u4e5f\u53ef\u4ee5\u624b\u52a8\u6307\u5b9a\u3002<\/p>\n\n\n\n

\n\n\n\n

2. ObjectId \u7684\u7ed3\u6784<\/strong><\/h2>\n\n\n\n

MongoDB \u7684 ObjectId<\/code> \u7531 12 \u5b57\u8282<\/strong> \u7ec4\u6210\uff0c\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u5b57\u8282\u6570<\/th>\u5185\u5bb9<\/th>\u8bf4\u660e<\/th><\/tr><\/thead>
4 \u5b57\u8282<\/td>\u65f6\u95f4\u6233<\/strong><\/td>\u8bb0\u5f55 ObjectId<\/code> \u751f\u6210\u7684\u79d2\u7ea7\u65f6\u95f4\u6233<\/strong>\uff08Unix \u65f6\u95f4\uff09<\/td><\/tr>
5 \u5b57\u8282<\/td>\u968f\u673a\u503c<\/strong><\/td>\u673a\u5668\u552f\u4e00\u6807\u8bc6\uff0c\u9632\u6b62\u4e0d\u540c\u673a\u5668\u751f\u6210\u76f8\u540c ObjectId<\/code><\/td><\/tr>
3 \u5b57\u8282<\/td>\u8ba1\u6570\u5668<\/strong><\/td>\u9012\u589e\u7684\u8ba1\u6570\u5668\uff0c\u786e\u4fdd\u540c\u4e00\u79d2\u5185\u7684\u591a\u4e2a ObjectId<\/code> \u552f\u4e00<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \n
  • \u793a\u4f8b ObjectId<\/code>\uff1a<\/li>\n<\/ul>\n\n\n\n
      65f3a13f4c7d6b58d0c8a7e2<\/code><\/pre>\n\n\n\n
    \u62c6\u89e3\uff1a<\/p>\n\n\n\n
      \n
    • 65f3a13f<\/code>\uff08\u65f6\u95f4\u6233\uff09<\/li>\n\n\n\n
    • 4c7d6b58d0<\/code>\uff08\u968f\u673a\u503c\uff09<\/li>\n\n\n\n
    • c8a7e2<\/code>\uff08\u8ba1\u6570\u5668\uff09<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n
      3. \u5982\u4f55\u751f\u6210 ObjectId<\/strong><\/h2>\n\n\n\n
      (1) MongoDB \u81ea\u52a8\u751f\u6210<\/strong><\/h3>\n\n\n\n
      \u5982\u679c\u4e0d\u6307\u5b9a _id<\/code>\uff0cMongoDB \u5728\u63d2\u5165\u6587\u6863\u65f6\u4f1a\u81ea\u52a8\u751f\u6210 ObjectId<\/code>\uff1a<\/p>\n\n\n\n
      db.users.insertOne({ name: \"Alice\" })<\/code><\/pre>\n\n\n\n
      \u81ea\u52a8\u751f\u6210\uff1a<\/p>\n\n\n\n
      {\n  \"_id\": ObjectId(\"65f3a13f4c7d6b58d0c8a7e2\"),\n  \"name\": \"Alice\"\n}<\/code><\/pre>\n\n\n\n
      (2) \u624b\u52a8\u521b\u5efa ObjectId<\/strong><\/h3>\n\n\n\n
      \u53ef\u4ee5\u4f7f\u7528 ObjectId()<\/code> \u65b9\u6cd5\u624b\u52a8\u521b\u5efa\uff1a<\/p>\n\n\n\n
      db.users.insertOne({ _id: ObjectId(\"65f3a13f4c7d6b58d0c8a7e2\"), name: \"Bob\" })<\/code><\/pre>\n\n\n\n
      \u6216\u8005\u5728 JavaScript \u4e2d\u521b\u5efa\uff1a<\/p>\n\n\n\n
      new ObjectId()<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      4. ObjectId \u76f8\u5173\u64cd\u4f5c<\/strong><\/h2>\n\n\n\n
      (1) \u63d0\u53d6 ObjectId \u751f\u6210\u65f6\u95f4<\/strong><\/h3>\n\n\n\n
      \u7531\u4e8e ObjectId<\/code> \u5305\u542b\u65f6\u95f4\u6233\uff0c\u53ef\u4ee5\u901a\u8fc7 getTimestamp()<\/code> \u65b9\u6cd5\u83b7\u53d6\u521b\u5efa\u65f6\u95f4\uff1a<\/p>\n\n\n\n
      var id = ObjectId(\"65f3a13f4c7d6b58d0c8a7e2\");\nid.getTimestamp()<\/code><\/pre>\n\n\n\n
      \u8f93\u51fa\uff1a<\/p>\n\n\n\n
      ISODate(\"2024-03-09T12:34:39Z\")<\/code><\/pre>\n\n\n\n
      (2) \u67e5\u8be2\u7279\u5b9a\u65f6\u95f4\u8303\u56f4\u7684\u6587\u6863<\/strong><\/h3>\n\n\n\n
      \u6839\u636e ObjectId \u7684\u65f6\u95f4\u6233\uff0c\u53ef\u4ee5\u67e5\u627e\u67d0\u4e2a\u65f6\u95f4\u6bb5\u5185\u7684\u6587\u6863\uff1a<\/p>\n\n\n\n
      db.users.find({ _id: { $gte: ObjectId.fromDate(new Date(\"2024-03-01\")) } })<\/code><\/pre>\n\n\n\n
      \u8fd9\u4e2a\u67e5\u8be2\u4f1a\u8fd4\u56de 2024-03-01<\/code> \u4e4b\u540e\u63d2\u5165\u7684\u6240\u6709\u6587\u6863\u3002<\/p>\n\n\n\n
      \n\n\n\n
      5. ObjectId \u7684\u7279\u70b9<\/strong><\/h2>\n\n\n\n
      \u2705 \u552f\u4e00\u6027<\/strong>\uff1a\u5168\u7403\u552f\u4e00\uff0c\u4fdd\u8bc1\u4e0d\u4f1a\u6709\u91cd\u590d ID\u3002
      \u2705 \u53ef\u6392\u5e8f\u6027<\/strong>\uff1a\u56e0\u4e3a\u5305\u542b\u65f6\u95f4\u6233\uff0cObjectId<\/code> \u6309\u65f6\u95f4\u9012\u589e<\/strong>\u3002
      \u2705 \u8282\u7701\u7a7a\u95f4<\/strong>\uff1a\u76f8\u6bd4 UUID\uff0816 \u5b57\u8282\uff09\uff0cObjectId<\/code> \u53ea\u5360 12 \u5b57\u8282<\/strong>\uff0c\u66f4\u8282\u7701\u5b58\u50a8\u3002<\/p>\n\n\n\n
      \u4f46\u4e5f\u6709\u4e00\u4e9b \u9650\u5236<\/strong>\uff1a
      \u274c \u53ef\u9884\u6d4b\u6027<\/strong>\uff1a\u5982\u679c\u66b4\u9732\u4e86 ObjectId<\/code>\uff0c\u53ef\u4ee5\u63a8\u6d4b\u521b\u5efa\u65f6\u95f4\uff0c\u53ef\u80fd\u5e26\u6765\u5b89\u5168\u98ce\u9669\u3002
      \u274c \u4e0d\u9002\u5408\u5916\u90e8\u67e5\u8be2<\/strong>\uff1a\u4e0d\u50cf UUID\uff0cObjectId<\/code> \u9002\u7528\u4e8e MongoDB\uff0c\u4f46\u4e0d\u4fbf\u4e8e\u4e0e\u5916\u90e8\u7cfb\u7edf\u517c\u5bb9\u3002<\/p>\n\n\n\n
      \n\n\n\n
      6. ObjectId vs UUID<\/strong><\/h2>\n\n\n\n
      \u5bf9\u6bd4\u9879<\/strong><\/th>ObjectId<\/strong><\/th>UUID<\/strong><\/th><\/tr><\/thead>
      \u5b57\u8282\u6570<\/strong><\/td>12 \u5b57\u8282<\/td>16 \u5b57\u8282<\/td><\/tr>
      \u552f\u4e00\u6027<\/strong><\/td>\u5168\u7403\u552f\u4e00<\/td>\u5168\u7403\u552f\u4e00<\/td><\/tr>
      \u662f\u5426\u5305\u542b\u65f6\u95f4<\/strong><\/td>\u2705 \u5305\u542b<\/td>\u274c \u4e0d\u5305\u542b<\/td><\/tr>
      \u6392\u5e8f\u7279\u6027<\/strong><\/td>\u2705 \u6309\u65f6\u95f4\u9012\u589e<\/td>\u274c \u65e0\u987a\u5e8f<\/td><\/tr>
      \u5b58\u50a8\u5f00\u9500<\/strong><\/td>\u8f83\u5c0f<\/td>\u8f83\u5927<\/td><\/tr>
      \u8de8\u6570\u636e\u5e93\u517c\u5bb9\u6027<\/strong><\/td>\u4ec5 MongoDB<\/td>\u8de8\u7cfb\u7edf\u517c\u5bb9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
      \n\n\n\n
      7. \u603b\u7ed3<\/strong><\/h2>\n\n\n\n
        \n
      • ObjectId<\/code> \u662f MongoDB \u7684\u9ed8\u8ba4\u4e3b\u952e<\/strong>\uff0c\u4fdd\u8bc1\u552f\u4e00\u6027\u3001\u987a\u5e8f\u6027\u3002<\/li>\n\n\n\n
      • \u5305\u542b\u65f6\u95f4\u6233<\/strong>\uff0c\u53ef\u4ee5\u67e5\u8be2\u6587\u6863\u7684\u521b\u5efa\u65f6\u95f4\u3002<\/li>\n\n\n\n
      • \u9002\u7528\u4e8e\u5927\u591a\u6570\u573a\u666f<\/strong>\uff0c\u4f46\u5982\u679c\u9700\u8981\u8de8\u7cfb\u7edf\u517c\u5bb9\uff0c\u5efa\u8bae\u4f7f\u7528 UUID\u3002<\/li>\n<\/ul>\n\n\n\n
        \u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u53ef\u4ee5\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        1. \u4ec0\u4e48\u662f ObjectId\uff1f ObjectId \u662f MongoDB \u6587\u6863\u7684\u9ed8\u8ba4\u552f\u4e00\u6807\u8bc6\u7b26\uff08_id\uff09\u3002\u5b83\u662f\u4e00 […]<\/p>\n","protected":false},"author":1,"featured_media":2541,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77],"tags":[],"class_list":["post-2491","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mongodb"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2491","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2491"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2491\/revisions"}],"predecessor-version":[{"id":2492,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2491\/revisions\/2492"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/2541"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2491"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2491"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}