{"id":30128,"date":"2022-10-17T07:18:34","date_gmt":"2022-07-24T16:49:24","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8rails%e7%9a%84activerecord%e8%8e%b7%e5%8f%96json%e7%9a%84%e5%80%bc\/"},"modified":"2025-08-12T17:42:32","modified_gmt":"2025-08-12T09:42:32","slug":"%e4%bd%bf%e7%94%a8rails%e7%9a%84activerecord%e8%8e%b7%e5%8f%96json%e7%9a%84%e5%80%bc","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8rails%e7%9a%84activerecord%e8%8e%b7%e5%8f%96json%e7%9a%84%e5%80%bc\/","title":{"rendered":"\u4f7f\u7528rails\u7684ActiveRecord\u83b7\u53d6json\u7684\u503c"},"content":{"rendered":"<h1>\u4f7f\u7528ActiveRecord\u63d0\u53d6json\u503c\u3002<\/h1>\n<p>\u6211\u7528&#8221;mongoDB\u67e5\u8be2\u5d4c\u5957\u6587\u6863&#8221;\u4f5c\u4e3a\u5173\u952e\u8bcd\u8fdb\u884c\u4e86\u641c\u7d22\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e24\u4e2a\u5173\u4e8eMongoDB\u548c\u5d4c\u5165\u5f0f\u6587\u6863\u67e5\u8be2\u7684Stack Overflow\u95ee\u9898\u94fe\u63a5\u7684\u7b80\u8ff0\uff1a<\/p>\n<p>1. https:\/\/stackoverflow.com\/questions\/3954520\/mongoid-mongodb-and-querying-embedded-documents<br \/>\n\u8fd9\u4e2a\u95ee\u9898\u8ba8\u8bba\u4e86\u5982\u4f55\u4f7f\u7528Mongoid\u548cMongoDB\u8fdb\u884c\u5d4c\u5165\u5f0f\u6587\u6863\u67e5\u8be2\u3002<\/p>\n<p>2. https:\/\/stackoverflow.com\/questions\/24749312\/mongoid-querying-embedded-docs\/24749539<br \/>\n\u8fd9\u4e2a\u95ee\u9898\u4e2d\uff0c\u5173\u4e8eMongoid\u5982\u4f55\u67e5\u8be2\u5d4c\u5165\u5f0f\u6587\u6863\u7684\u8ba8\u8bba\u7740\u91cd\u4e8e\u7279\u5b9a\u7684\u7528\u4f8b\u548c\u67e5\u8be2\u65b9\u6cd5\u3002<\/p>\n<p>\u5982\u679c\u5c06\u5c42\u6b21\u5316\u7684JSON\u6570\u636e\u7528\u70b9\u53f7\u8fde\u63a5\u8d77\u6765\uff0c\u4f3c\u4e4e\u53ef\u4ee5\u83b7\u53d6\u5230\u8be5\u6570\u636e\u3002<\/p>\n<p>\u6211\u8fd9\u6b21\u60f3\u8981\u505a\u7684\u5c31\u662f\u4ececptrans\u5185\u63d0\u53d6\u53ea\u6709\u7279\u5b9akey\u7684\u503c\u4e0d\u4e3a\u7a7a\u7684\u8bb0\u5f55\u3002<\/p>\n<h2>\u7f51\u7edc\u6a21\u578b<\/h2>\n<pre class=\"post-pre\"><code>{\r\n    _id: 1,\r\n    cptrans: {\r\n        _id: ObjectId('61712564a3519d0001fe97aa'),\r\n        mcc: 440,\r\n        mnc: 51,\r\n        tracking_area_code: 41481,\r\n        cell_id: '68030469',\r\n        location_area_code: 0,\r\n        rsrp: -66,\r\n        rssi: -41,\r\n        rsrq: -7,\r\n        rssnr: 0,\r\n        traffic_channel: 0,\r\n        band: 18,\r\n        radio_interface: 'LTE',\r\n        band_width: '0',\r\n    }\r\n}\r\n\r\n<\/code><\/pre>\n<p>\u5982\u679c\u60f3\u4ece\u5b58\u50a8\u5728MongoDB\u4e2d\u7684Networks\u6a21\u578b\u4e2d\u63d0\u53d6\u7279\u5b9a\u952e\u503c\u4e0d\u4e3anull\u7684\u8bb0\u5f55\uff0c\u53ef\u4ee5\u8fdb\u884c\u5982\u4e0b\u64cd\u4f5c\u3002<\/p>\n<h2>\u7ed3\u679c<\/h2>\n<p>\u8bf7\u5c06\u60f3\u8981\u63d0\u53d6\u7684\u5173\u952e\u8bcd\u653e\u5165 rank_type\u3002<\/p>\n<pre class=\"post-pre\"><code>Nerwork.where(\"cptrans.#{rank_type}\" =&gt; { '$ne' =&gt; nil })\r\n<\/code><\/pre>\n<p>\u4e3a\u4e86\u80fd\u591f\u6839\u636e\u4e0d\u540c\u7684key\u8fdb\u884c\u63d0\u53d6\uff0c\u6211\u521b\u5efa\u4e86\u4e00\u4e2ascope\uff0c\u5e76\u91c7\u7528\u4e86\u4ee5\u4e0b\u7c7b\u4f3c\u7684\u65b9\u6cd5\u6765\u5904\u7406\u3002<br \/>\n\u5982\u679c\u5bf9scope\u4e0d\u4e86\u89e3\u7684\u4eba\u53ef\u4ee5\u53c2\u8003\u8fd9\u4e2a\u94fe\u63a5\uff1ahttps:\/\/qiita.com\/ngron\/items\/14a39ce62c9d30bf3ac3<\/p>\n<pre class=\"post-pre\"><code>scope :rank_type, -&gt;(rank_type) {\r\n    case rank_type\r\n    when :rsrp, :rsrq, :rssnr                 then where('cptrans' =&gt; { '$ne' =&gt; nil })\r\n    when :rssi, :nr_rssi, :nr_rsrp, :nr_rsrq  then where(\"cptrans.#{rank_type}\" =&gt; { '$ne' =&gt; nil })\r\n    when :tx_rate                             then where('iperf' =&gt; { '$ne' =&gt; nil })\r\n    end\r\n  }\r\n<\/code><\/pre>\n<h1>\u8bf7\u63d0\u4f9b\u4ee5\u4e0b\u5185\u5bb9\u7684\u4e2d\u6587\u91ca\u4e49\uff0c\u4ec5\u9700\u8981\u4e00\u79cd\u9009\u9879\uff1a<\/h1>\n<p>&#8211; &#8220;Can you give me a sandwich?&#8221;<br \/>\n&#8211; &#8220;Where is the nearest hospital?&#8221;<br \/>\n&#8211; &#8220;What time is the meeting?&#8221;<br \/>\n&#8211; &#8220;How much does this shirt cost?&#8221;<br \/>\n&#8211; &#8220;I am from the United States.&#8221;<br \/>\n&#8211; &#8220;Please close the door.&#8221;<br \/>\n&#8211; &#8220;Do you have any vegetarian options?&#8221;<br \/>\n&#8211; &#8220;How far is the airport from here?&#8221;<br \/>\n&#8211; &#8220;Could you recommend a good restaurant?&#8221;<br \/>\n&#8211; &#8220;What is your phone number?&#8221;<br \/>\n&#8211; &#8220;Can you help me with directions to the train station?&#8221;<br \/>\n&#8211; &#8220;Is there a pharmacy nearby?&#8221;<br \/>\n&#8211; &#8220;What is the weather like today?&#8221;<br \/>\n&#8211; &#8220;I would like a glass of water.&#8221;<br \/>\n&#8211; &#8220;Do you accept credit cards?&#8221;<\/p>\n<p>\u8303\u56f4<br \/>\nhttps:\/\/qiita.com\/ngron\/items\/14a39ce62c9d30bf3ac3<\/p>\n<p>\u83b7\u53d6MongoDB\u54c8\u5e0c\u503c\u7684\u65b9\u6cd5\uff1a<br \/>\nhttps:\/\/stackoverflow.com\/questions\/3954520\/mongoid-mongodb-and-querying-embedded-documents<br \/>\nhttps:\/\/stackoverflow.com\/questions\/24749312\/mongoid-querying-embedded-docs\/24749539<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528ActiveRecord\u63d0\u53d6json\u503c\u3002 \u6211\u7528&#8221;mongoDB\u67e5\u8be2\u5d4c\u5957\u6587\u6863&#8221;\u4f5c\u4e3a\u5173 [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30128","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u4f7f\u7528rails\u7684ActiveRecord\u83b7\u53d6json\u7684\u503c - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u4f7f\u7528rails\u7684ActiveRecord\u83b7\u53d6json\u7684\u503c\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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