{"id":101388,"date":"2024-03-22T03:53:54","date_gmt":"2024-03-21T18:53:54","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/mongodb%e3%81%ae%e9%9d%9enull%e5%80%a4%e5%88%a4%e6%96%ad%e3%81%ae%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89\/"},"modified":"2024-04-04T18:47:40","modified_gmt":"2024-04-04T09:47:40","slug":"mongodb%e3%81%ae%e9%9d%9enull%e5%80%a4%e5%88%a4%e6%96%ad%e3%81%ae%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/mongodb%e3%81%ae%e9%9d%9enull%e5%80%a4%e5%88%a4%e6%96%ad%e3%81%ae%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89\/","title":{"rendered":"MongoDB\u306e\u975eNULL\u5024\u5224\u65ad\u306e\u30e1\u30bd\u30c3\u30c9"},"content":{"rendered":"<p>MongoDB \u3067\u306f\u3001$ne \u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u3066\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u7a7a\u3067\u306a\u3044\u304b\u3092\u5224\u5b9a\u3067\u304d\u307e\u3059\u3002$ne \u6f14\u7b97\u5b50\u306f\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u6307\u5b9a\u3057\u305f\u5024\u3068\u7b49\u3057\u304f\u306a\u3044\u304b\u3092\u6bd4\u8f03\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u304c\u6307\u5b9a\u3057\u305f\u5024\u3068\u7b49\u3057\u304f\u306a\u3044\u5834\u5408\u3001$ne \u6f14\u7b97\u5b50\u306f true \u3092\u8fd4\u3057\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u3001$ne \u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u7a7a\u3067\u306a\u3044\u304b\u3092\u5224\u5b9a\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u305d\u306e\u4f8b\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\">db.collection.find({\u00a0field:\u00a0{\u00a0$ne:\u00a0null\u00a0}\u00a0})<\/pre>\n<p>\u4e0a\u8a18\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f\u3001`collection` \u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u540d\u3001`field` \u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u540d\u3067\u3059\u3002\u3053\u306e\u30af\u30a8\u30ea\u306f\u3059\u3079\u3066\u306e `field` \u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u304c null \u3067\u306f\u306a\u3044\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u8fd4\u3057\u307e\u3059\u3002\u307e\u305f\u3001$exists \u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a\u3057\u305f\u308a\u3001$type \u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u30c7\u30fc\u30bf\u578b\u304c null \u304b\u3069\u3046\u304b\u3092\u5224\u5b9a\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MongoDB \u3067\u306f\u3001$ne \u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u3066\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u7a7a\u3067\u306a\u3044\u304b\u3092\u5224\u5b9a\u3067\u304d\u307e\u3059\u3002$ne \u6f14\u7b97\u5b50\u306f\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u6307\u5b9a\u3057\u305f\u5024\u3068\u7b49\u3057\u304f\u306a\u3044\u304b\u3092\u6bd4\u8f03\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u304c\u6307\u5b9a\u3057\u305f\u5024\u3068\u7b49\u3057\u304f\u306a\u3044\u5834\u5408\u3001$ne \u6f14 [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-101388","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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