{"id":16560,"date":"2024-12-23T18:46:03","date_gmt":"2024-12-23T15:16:03","guid":{"rendered":"https:\/\/www.itpiran.net\/blog\/?p=16560"},"modified":"2024-12-23T18:46:03","modified_gmt":"2024-12-23T15:16:03","slug":"getters-setters","status":"publish","type":"post","link":"https:\/\/www.itpiran.net\/blog\/zh\/tutorials\/getters-setters\/","title":{"rendered":"MongoDB \u4e2d\u7684 Getter \u548c Setter"},"content":{"rendered":"<h2 id=\"%d9%85%d9%82%d8%af%d9%85%d9%87\">\u4ecb\u7ecd<\/h2>\n<p><code>\u5f97\u5230<\/code>\u548c <code>\u653e<\/code>\u5b83\u4eec\u53ef\u4ee5\u5e2e\u52a9\u60a8\u66f4\u6539\u5982\u4f55\u68c0\u7d22\u548c\u8bbe\u7f6e\u5e95\u5c42\u539f\u59cb\u6587\u6863\u4e2d\u7531\u952e\u548c\u503c\u5b9a\u4e49\u7684\u5c5e\u6027\u3002.<\/p>\n<h2 id=\"setters\">\u4e8c\u4f20\u624b<\/h2>\n<p><code>\u653e<\/code> \u5b83\u4eec\u5141\u8bb8\u60a8\u5728 mongoose \u6587\u6863\u6570\u636e\u5230\u8fbe\u539f\u59cb MongoDB \u6587\u6863\u5e76\u5c06\u5176\u8bbe\u7f6e\u4e3a\u5b9e\u9645\u952e\u7684\u503c\u4e4b\u524d\u5bf9\u5176\u8fdb\u884c\u8f6c\u6362\u3002.<\/p>\n<p>\u5047\u8bbe\u60a8\u6b63\u5728\u4e3a\u4e00\u4e2a\u7f51\u7ad9\u5b9e\u73b0\u7528\u6237\u6ce8\u518c\u529f\u80fd\u3002\u7528\u6237\u63d0\u4f9b\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u548c\u5bc6\u7801\uff0c\u8fd9\u4e9b\u4fe1\u606f\u5b58\u50a8\u5728 MongoDB \u4e2d\u3002\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u60a8\u9700\u8981\u5c06\u5176\u89c4\u8303\u5316\u4e3a\u5c0f\u5199\uff0c\u4ee5\u9632\u6b62\u4e00\u4e2a\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u5bf9\u5e94\u591a\u4e2a\u5e10\u6237\u3002\u4f8b\u5982\uff0cavenue@q.com \u53ef\u80fd\u901a\u8fc7 avenue@q.com \u548c AvEnUe@Q.Com \u4e24\u4e2a\u5e10\u6237\u8fdb\u884c\u6ce8\u518c\u3002.<\/p>\n<p>\u60a8\u53ef\u4ee5\u901a\u8fc7 Mongoose \u7684 setter \u8f7b\u677e\u914d\u7f6e\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u7684\u5927\u5c0f\u5199\u89c4\u8303\u5316\u3002\u8bf7\u6ce8\u610f\uff0c\u5728\u4ee5\u4e0b\u4ee3\u7801\u7247\u6bb5\u4e2d\uff0csetter\uff08\u4ee5\u53ca\u6536\u4ef6\u4eba\uff09\u5747\u5728 Schema \u4e2d\u5b9a\u4e49\uff1a<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-js\" data-lang=\"JavaScript\"><code>function toLower (v) {\r\nreturn v.toLowerCase();\r\n}\r\nvar UserSchema = new Schema({\r\nemail: { type: String, set: toLower } \r\n});\r\nvar User = mongoose.model('User', UserSchema);\r\nvar user = new User({email: 'AVENUE@Q.COM'});\r\nconsole.log(user.email); \/\/ 'avenue@q.com'<\/code><\/pre>\n<\/div>\n<p>\u5982\u4e0a\u6240\u793a\uff0csetter \u5141\u8bb8\u60a8\u5728\u6570\u636e\u5230\u8fbe\u539f\u59cb mongodb \u6587\u6863\u4e4b\u524d\u5bf9\u5176\u8fdb\u884c\u8f6c\u6362\uff0c\u5e76\u5c06\u5176\u8bbe\u7f6e\u4e3a\u5b9e\u9645\u952e\u7684\u503c\u3002.<\/p>\n<h2 id=\"getters\">\u83b7\u53d6\u5668<\/h2>\n<p><code>\u5f97\u5230<\/code> \u5b83\u4eec\u5141\u8bb8\u60a8\u5728\u4ece\u539f\u59cb MongoDB \u6587\u6863\u5bfc\u822a\u5230\u60a8\u6240\u770b\u5230\u7684\u5185\u5bb9\u7684\u8fc7\u7a0b\u4e2d\u8f6c\u6362\u6570\u636e\u89c6\u56fe\u3002.<\/p>\n<p>\u5047\u8bbe\u4f60\u8981\u5b58\u50a8\u4e00\u4e2a\u4fe1\u7528\u5361\u53f7\uff0c\u5e76\u4e14\u4f60\u60f3\u5bf9 Mongoose \u7528\u6237\u9690\u85cf\u9664\u6700\u540e 4 \u4f4d\u6570\u5b57\u4e4b\u5916\u7684\u6240\u6709\u5185\u5bb9\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u5b9a\u4e49\u4e00\u4e2a\u63a5\u6536\u8005\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\uff0c\u5982\u4e0b\u6240\u793a\uff08\u518d\u6b21\u6ce8\u610f\uff0c\u63a5\u6536\u8005\u662f\u5728 Schema \u4e2d\u5b9a\u4e49\u7684\uff09\uff1a<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-js\" data-lang=\"JavaScript\"><code>function obfuscate (cc) {\r\nreturn '****-****-****-' + cc.slice(cc.length-4, cc.length);\r\n}\r\nvar AccountSchema = new Schema({\r\ncreditCardNumber: { type: String, get: obfuscate }\r\n});\r\nvar Account = mongoose.model('Account', AccountSchema);\r\nAccount.findById( someId, function (err, found) {\r\nconsole.log(found.creditCardNumber); \/\/ '****-****-****-1234'\r\n});<\/code><\/pre>\n<\/div>\n<h2 id=\"%d9%86%d8%aa%db%8c%d8%ac%d9%87\">\u7ed3\u679c<\/h2>\n<p>Setter \u65b9\u6cd5\u7528\u4e8e\u4fee\u6539\u5e95\u5c42\u539f\u59cb\u6570\u636e\u3002Getter \u65b9\u6cd5\u7528\u4e8e\u8f6c\u6362\uff08\u4f46\u4e0d\u4fee\u6539\u539f\u59cb\u6570\u636e\u672c\u8eab\uff09\u5e95\u5c42\u539f\u59cb\u6570\u636e\uff0c\u4f7f\u5176\u7b26\u5408\u7528\u6237\u9884\u671f\u3002\u4e24\u8005\u90fd\u5728\u6a21\u5f0f\u5b9a\u4e49\u4e2d\u5b9a\u4e49\u3002.<\/p>","protected":false},"excerpt":{"rendered":"get \u548c set \u65b9\u6cd5\u7b80\u4ecb\u5e2e\u52a9\u60a8\u4e86\u89e3\u5982\u4f55\u83b7\u53d6\u548c\u8bbe\u7f6e\u7531\u952e\u548c\u503c\u5b9a\u4e49\u7684\u5c5e\u6027\u2026\u2026","protected":false},"author":1,"featured_media":16562,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"getter \u0648 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