{"id":101193,"date":"2024-03-22T03:37:03","date_gmt":"2024-03-21T18:37:03","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/mongodb%e3%81%a7%e7%89%b9%e5%ae%9a%e3%81%ae%e3%83%95%e3%82%a3%e3%83%bc%e3%83%ab%e3%83%89%e3%82%92%e5%89%8a%e9%99%a4%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/"},"modified":"2024-04-04T22:24:36","modified_gmt":"2024-04-04T13:24:36","slug":"mongodb%e3%81%a7%e7%89%b9%e5%ae%9a%e3%81%ae%e3%83%95%e3%82%a3%e3%83%bc%e3%83%ab%e3%83%89%e3%82%92%e5%89%8a%e9%99%a4%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/mongodb%e3%81%a7%e7%89%b9%e5%ae%9a%e3%81%ae%e3%83%95%e3%82%a3%e3%83%bc%e3%83%ab%e3%83%89%e3%82%92%e5%89%8a%e9%99%a4%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/","title":{"rendered":"mongodb\u3067\u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u524a\u9664\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p>MongoDB\u306e\u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u524a\u9664\u3059\u308b\u306b\u306f\u3001$unset\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001$unset\u3092\u4f7f\u7528\u3057\u3066\u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u524a\u9664\u3059\u308b\u30b3\u30fc\u30c9\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>db.<span class=\"hljs-property\">collection<\/span>.<span class=\"hljs-title function_\">updateMany<\/span>({}, { <span class=\"hljs-attr\">$unset<\/span>: { <span class=\"hljs-attr\">fieldName<\/span>: <span class=\"hljs-string\">\"\"<\/span> } })\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001collection\u306f\u64cd\u4f5c\u5bfe\u8c61\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u540d\u3001fieldName\u306f\u524a\u9664\u3059\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u540d\u3067\u3059\u3002updateMany()\u30e1\u30bd\u30c3\u30c9\u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u5185\u306e\u5168\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u5bfe\u3057\u3066\u66f4\u65b0\u51e6\u7406\u3092\u5b9f\u884c\u3057\u3001$unset\u6f14\u7b97\u5b50\u306f\u6307\u5b9a\u3057\u305f\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u524a\u9664\u3057\u307e\u3059\u3002<\/p>\n<p>\u5982\u679c\u8981\u5220\u9664\u5d4c\u5957\u5b57\u6bb5\uff0c\u53ef\u4ee5\u4f7f\u7528\u70b9\u7b26\u53f7\u6765\u6307\u5b9a\u8def\u5f84\u3002\u4f8b\u5982\uff0c\u5982\u679c\u8981\u5220\u9664\u96c6\u5408\u4e2d\u6bcf\u4e2a\u6587\u6863\u7684 nestedField \u5b57\u6bb5\u7684 nestedSubField \u5b50\u5b57\u6bb5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n<pre class=\"post-pre\"><code>db.<span class=\"hljs-property\">collection<\/span>.<span class=\"hljs-title function_\">updateMany<\/span>({}, { <span class=\"hljs-attr\">$unset<\/span>: { <span class=\"hljs-string\">\"nestedField.nestedSubField\"<\/span>: <span class=\"hljs-string\">\"\"<\/span> } })\r\n<\/code><\/pre>\n<p>\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u524a\u9664\u3059\u308b\u3068\u3001\u30c7\u30fc\u30bf\u306f\u6c38\u4e45\u306b\u6d88\u53bb\u3055\u308c\u5fa9\u5143\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u306e\u3067\u5341\u5206\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u305d\u306e\u305f\u3081\u3001\u524a\u9664\u64cd\u4f5c\u3092\u5b9f\u884c\u3059\u308b\u524d\u306b\u3001\u672c\u5f53\u306b\u305d\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u524a\u9664\u3057\u305f\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MongoDB\u306e\u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u524a\u9664\u3059\u308b\u306b\u306f\u3001$unset\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001$unset\u3092\u4f7f\u7528\u3057\u3066\u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u524a\u9664\u3059\u308b\u30b3\u30fc\u30c9\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002 db.collection.updateMany({}, { [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-101193","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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