{"id":298,"date":"2017-05-04T17:46:09","date_gmt":"2017-05-04T09:46:09","guid":{"rendered":"https:\/\/colliot.me\/?p=298"},"modified":"2017-11-20T06:56:44","modified_gmt":"2017-11-19T22:56:44","slug":"%e4%b8%80%e4%b8%aa%e4%b8%8d%e6%ad%a3%e7%a1%ae%e7%9a%84-typescript-%e7%b1%bb%e5%9e%8b%e5%ae%9a%e4%b9%89%e5%bc%95%e5%8f%91%e7%9a%84%e8%a1%80%e6%a1%88","status":"publish","type":"post","link":"https:\/\/colliot.org\/ru\/2017\/05\/%e4%b8%80%e4%b8%aa%e4%b8%8d%e6%ad%a3%e7%a1%ae%e7%9a%84-typescript-%e7%b1%bb%e5%9e%8b%e5%ae%9a%e4%b9%89%e5%bc%95%e5%8f%91%e7%9a%84%e8%a1%80%e6%a1%88\/","title":{"rendered":"(\u4e2d\u6587) \u4e00\u4e2a\u4e0d\u6b63\u786e\u7684 TypeScript \u7c7b\u578b\u5b9a\u4e49\u5f15\u53d1\u7684\u8840\u6848"},"content":{"rendered":"

\u0418\u0437\u0432\u0438\u043d\u0438\u0442\u0435, \u044d\u0442\u043e\u0442 \u0442\u0435\u0445\u0442 \u0434\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0442\u043e\u043b\u044c\u043a\u043e \u0432 “\u4e2d\u6587<\/a>” \u0438 “\u0410\u043c\u0435\u0440\u0438\u043a\u0430\u043d\u0441\u043a\u0438\u0439 \u0410\u043d\u0433\u043b\u0438\u0439\u0441\u043a\u0438\u0439<\/a>”. For the sake of viewer convenience, the content is shown below in this site default language. You may click one of the links to switch the site language to another available language.<\/p>

Mongoose \u7684 TypeScript \u7c7b\u578b\u5b9a\u4e49\u5e76\u4e0d\u5b8c\u5168\u6b63\u786e\uff01<\/p>\n

\u6628\u5929\u665a\u4e0a\u5728 bgs \u7814\u7a76\u4e86\uff08\u6216\u8005\u8bf4\u8c03\u8bd5\u4e86\uff09XGS<\/a> \u5199\u7684 nodejs \u670d\u52a1\u5668\u9879\u76ee\u3002\u4ed6\u5728\u7528 koa \u4f5c\u4e3a\u670d\u52a1\u5668\uff0cmongodb \u4f5c\u4e3a\u6570\u636e\u5b58\u50a8\uff0c\u5199\u4e00\u4e2a\u4e0d\u77e5\u9053\u4ec0\u4e48\u9879\u76ee\uff08\u4f3c\u4e4e\u540d\u4e3a\u300c\u5199\u4f5c\u8005\u5e73\u53f0\u300d\/ «Write’s Platform»\uff09\u3002\u53cd\u6b63\u5f53\u65f6\u8fd8\u5904\u4e8e\u5f88\u521d\u7ea7\u7684\u9636\u6bb5\uff0c\u53ea\u6709\u4e24\u4e2a\u8def\u7531\uff0c\u4e00\u4e2a get\uff0c\u4e00\u4e2a post\uff0c\u540e\u8005\u662f\u7528\u6765\u5411 mongodb \u63d0\u4ea4\u4e00\u7bc7\u6587\u7ae0\u7684\u3002\u5728\u6d4b\u8bd5\u8fc7\u7a0b\u4e2d\uff0c\u4ed6\u53d1\u73b0\u4e86\u4e00\u4e2a\u95ee\u9898\u2014\u2014\u4ed6\u5728\u4fdd\u5b58\u6587\u7ae0\u7684\u56de\u8c03\u4e2d\u66f4\u6539\u4e86\u54cd\u5e94\u7684\u5185\u5bb9\uff08\u5982\u4e0b\uff09\uff0c\u4f46\u662f\u5b9e\u9645\u6d4b\u8bd5\u5f97\u5230\u7684\u54cd\u5e94\u5185\u5bb9\u5374\u662f koa \u9ed8\u8ba4\u7684 OK\u3002<\/p>\n

router.post('\/path', (ctx, next) => {\r\n    const article = new Article( \/* something *\/ );\r\n    article.save((err, article) => {\r\n      if (err){\r\n        ctx.body = err;\r\n      } else {\r\n        ctx.body = \"success\";\r\n      }\r\n    });\r\n})<\/pre>\n
\u8d77\u521d\u6211\u53d1\u73b0\uff0c\u4ed6\u7684\u4ee3\u7801\u4e2d\uff0crouter.post('\/path', (ctx, next) => { \/* body *\/ });<\/code>\u7684\/* body *\/<\/code>\u8fd9\u6bb5\u4e2d\u5e76\u6ca1\u6709\u8fd4\u56de next()<\/code>\uff0c\u8fd9\u5e94\u8be5\u4f1a\u5bfc\u81f4\u5f02\u6b65\u7684\u56de\u8c03\u6ca1\u6709\u88ab\u963b\u585e\u3002<\/p>\n
\u63a5\u7740\u6211\u60f3\uff0c\u53ef\u80fd\u53c8\u662f koa \u7684\u7248\u672c\u641e\u6df7\u4e86\u4ec0\u4e48\u7684\uff0c\u56e0\u4e3a koa v2\uff0ckoa router \u4ec0\u4e48\u7684\u7248\u672c\u7ba1\u7406\u90fd\u5f88\u6df7\u4e71\uff0c\u957f\u671f\u5904\u4e8e\u867d\u7136\u5927\u5bb6\u90fd\u60f3\u4f7f\u7528\u6700\u65b0\u7248\uff0c\u4f46\u662f\u9ed8\u8ba4\u7684\u5374\u4e00\u76f4\u662f\u65e7\u7248\u7684\u60c5\u51b5\u3002\u540e\u6765\u53c8\u51fa\u73b0\u4e86 koa \u662f\u65b0\u7248\uff0crouter \u662f\u65e7\u7248\u7684\u60c5\u51b5\uff0c\u66fe\u7ecf\u6211\u4e3a\u522b\u4eba\u89e3\u51b3\u8fc7\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n
\u4f46\u662f\u8fd9\u6b21\u5374\u4e0d\u662f\u3002\u5e76\u4e14\u628a\u8fd4\u56de promise \u5207\u6362\u4e3a\u4f7f\u7528 async\/await<\/code>\u4e4b\u540e\uff08\u5982\u4e0b\uff09\uff0c\u60c5\u51b5\u4f9d\u7136\u6ca1\u6709\u597d\u8f6c\u3002<\/p>\n
router.post('\/path', (ctx, next) => {\r\n    const article = new Article( \/* something *\/ );\r\n    return article.save((err, saved) => {\r\n      if (err){\r\n        ctx.body = err;\r\n      } else {\r\n        console.log(saved);\r\n        ctx.body = \"success\";\r\n      }\r\n      \/\/ or `return next();` here.\r\n    }).then((thing) => {\r\n        console.log(thing);\r\n        return next();\r\n    });\r\n})<\/pre>\n
\uff08\u8fc7\u7a0b\u4e2d\u6211\u4eec\u53d1\u73b0\u8fd9\u4e2a\u4f20\u7ed9\u56de\u8c03\u7684 thing<\/code>\u5c45\u7136\u662fundefined<\/code>\uff0c\u8fd9\u662f\u4e2a\u4f0f\u7b14\uff09<\/p>\n
\u6e10\u6e10\u5730\u6211\u88ab\u5404\u79cd\u51fd\u6570\u7684\u7b7e\u540d\uff08\u6bd4\u5982\u7a76\u7adf\u5e94\u8be5\u8fd4\u56de\u4e00\u4e2a\u4ec0\u4e48\uff0c\u662f next() \u8fd8\u662f\u4e00\u4e2a promise\uff0c\u800c next \u7684\u7c7b\u578b\u53c8\u662f\u4ec0\u4e48\uff1f\uff09\u641e\u5f97\u70e6\u8e81\u8d77\u6765\u3002\u4e8e\u662f\u6211\u63d0\u8bae\u4f7f\u7528 TypeScript \u6765\u8f85\u52a9\u68c0\u67e5\u3002<\/p>\n
\u6211\u4eec\u5f00\u59cb\u6000\u7591 article.save<\/code>\u8fd9\u4e2a\u51fd\u6570\u3002\u56e0\u4e3a\u5728 koa \u5b98\u65b9\uff08\u4ec5\u6709\uff09\u7684\u3001\u6d89\u53ca\u5230\u7b49\u5f85\u5f02\u6b65\u52a8\u4f5c\u7684 router \u4ee3\u7801\u6837\u4f8b\u91cc\uff0c\u5b8c\u5168\u7c7b\u4f3c\u7684\u4ee3\u7801\u662f\u53ef\u4ee5\u5de5\u4f5c\u7684\uff1a<\/p>\n
router.get(\r\n  '\/users\/:id',\r\n  function (ctx, next) {\r\n    return User.findOne(ctx.params.id).then(function(user) {\r\n      ctx.user = user;\r\n      return next();\r\n\r\n    });\r\n  },\r\n  function (ctx) {\r\n    console.log(ctx.user);\r\n    \/\/ => { id: 17, name: \"Alex\" }\r\n  }\r\n);<\/pre>\n
\u4e8e\u662f\u6211\u4eec\u7740\u91cd\u68c0\u67e5\u4e86 mongoose \u7684 TypeScript \u7c7b\u578b\u5b9a\u4e49\u6587\u4ef6\u3002\u8fd9\u4e2a article<\/code>\u662fArticle<\/code>\u7684\u5b9e\u4f8b\uff0c\u800cArticle<\/code>\u5b9e\u9645\u4e0a\u662f mongoose \u52a8\u6001\u6784\u9020\u51fa\u6765\u7684\u4e00\u4e2a\u7c7b\uff08\u5e94\u8be5\u662f\u901a\u8fc7\u4e86\u67d0\u79cd\u5143\u7f16\u7a0b\u6280\u672f\uff09\u3002\u5728\u7c7b\u578b\u5b9a\u4e49\u4e2d\u662f\u8fd9\u4e48\u53cd\u6620\u7684\uff1a<\/p>\n
interface Model<T extends Document> extends NodeJS.EventEmitter, ModelProperties {\r\n    new(doc?: Object): T;\r\n    \/* other things *\/\r\n}<\/pre>\n
\u800c article \u5c31\u662f\u90a3\u4e2a<T extends Document><\/code>\uff0c\u800c Document<\/code>\u7684save<\/code>\u65b9\u6cd5\u662f\u8fd9\u4e48\u5199\u7684\uff1a<\/p>\n
    \/**\r\n     * Saves this document.\r\n     * @param options options optional options\r\n     * @param options.safe overrides schema's safe option\r\n     * @param options.validateBeforeSave set to false to save without validating.\r\n     * @param fn optional callback\r\n     *\/\r\n    save(options?: SaveOptions, fn?: (err: any, product: this, numAffected: number) => void): Promise<this>;\r\n    save(fn?: (err: any, product: this, numAffected: number) => void): Promise<this>;<\/pre>\n
\uff08\u53d6\u81ea npm install @types\/mongoose<\/code>\u7684\u7ed3\u679c\uff0c\u4e0d\u77e5\u4e3a\u4f55\u4e0e DefinitelyTyped \u4e0a\u7684\u6709\u6240\u4e0d\u540c\u3002\uff09\u770b\u5230\u8fd9\uff0c\u7279\u522b\u662fPromise<this><\/code>\uff0c\u6211\u5c31\u786e\u4fe1\u4e86\uff0c\u8fd9\u4e2a\u51fd\u6570\u6ca1\u6709\u95ee\u9898\u3002\u53ef\u662f\u4e0a\u9762\u8fd4\u56de\u7684thing<\/code>\u53c8\u786e\u4e4e\u662f\u4e00\u4e2aundefined<\/code>\uff0c\u96be\u9053\u662f\u6211\u4eec\u7684\u4f7f\u7528\u59ff\u52bf\u6709\u95ee\u9898\uff1f<\/p>\n
\u4e07\u822c\u65e0\u5948\u4e4b\u4e2d\uff0cTypeScript \u4e5f\u4e0d\u9760\u8c31\u4e4b\u9645\uff0c\u6211\u4eec\u53ea\u80fd\u8bc9\u8bf8\u6e90\u7801\u4e86\u3002\u9274\u4e8e mongoose \u7684\u4ee3\u7801\u98ce\u683c\uff0c\u76f4\u63a5\u641c\u7d22 .prototype.save<\/code>\u5c31\u80fd\u627e\u5230\u3002\u5b83\u5b9e\u9645\u4e0a\u662f\u5728\u8fd9\u91cc<\/a>\uff0c\u4f46\u662f\u770b\u5230\u8fd9\u91cc\u8ba9\u4eba\u66f4\u5d29\u6e83\u4e86\uff1a<\/p>\n
Model.prototype.save = function(options, fn) {\r\n  if (typeof options === 'function') {\r\n    fn = options;\r\n    options = undefined;\r\n  }\r\n\r\n  if (!options) {\r\n    options = {};\r\n  }\r\n\r\n  if (fn) {\r\n    fn = this.constructor.$wrapCallback(fn);\r\n  }\r\n\r\n  return this.$__save(options, fn);\r\n};<\/pre>\n
\u5b83\u8fd4\u56de\u7684\u662fthis.$__save<\/code>\u7684\u7ed3\u679c\uff0c\u4f46\u8fd9\u4e2a\u51fd\u6570<\/a>\u5e76\u6ca1\u6709\u8fd4\u56de\u503c\uff01\u65e5\u5fd7\u663e\u793a\uff0c\u8fd9\u91cc\u7684this<\/code>\u5c31\u662f\u8fd9\u4e2aarticle<\/code>\u5b9e\u4f8b\uff08\u4e00\u4e2aDocument<\/code>\uff09\u3002\u7136\u800c\u7ebf\u7d22\u5230\u8fd9\u91cc\u4f3c\u4e4e\u65ad\u4e86\u3002\u600e\u4e48\u80fd\u51ed\u7a7a\u4ece\u4e00\u4e2a\u6ca1\u6709\u8fd4\u56de\u503c\u7684\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a promise \u5462\uff1f<\/span><\/p>\n
\u6211\u4eec\u53c8\u60f3\u5230\u4e86\u4e00\u62db\uff1a\u67e5\u770b\u8c03\u7528\u6808\u3002\u4f46\u662f node \u7684\u8c03\u8bd5\u5668\u5728\u8fd9\u65f6\u5374\u4e0d\u597d\u4f7f\u4e86\u3002\u6211\u4eec\u53ea\u80fd\u7528\u539f\u59cb\u7c97\u66b4\u7684console.trace<\/code>\u624b\u52a8\u641e\u51fa\u8c03\u7528\u6808\u3002\u867d\u7136\u6ca1\u6709\u76f4\u63a5\u7684\u7ebf\u7d22\uff0c\u8fd9\u4e2a\u8c03\u7528\u6808\u7ed9\u4e86\u6211\u4eec\u4e00\u4e9b\u63d0\u793a\u2014\u2014save<\/code>\u5e76\u4e0d\u662f\u76f4\u63a5\u8c03\u7528\u7684\uff0c\u800c\u662f\u7ecf\u8fc7\u4e86\u67d0\u79cdhook<\/code>\u7684\u5c01\u88c5\u3002<\/p>\n
\u8fd9\u65f6\uff0c\u6211\u60f3\u5230\u4e86\u76f4\u63a5console.log(article.save)<\/code>\uff0c\u5b83\u5c45\u7136\u662f\u4e00\u4e2awrappedPointCut<\/code>\u51fa\u6765\u7684\u7ed3\u679c\uff01\u518d\u5728\u4ee3\u7801\u91cc\u641c\u7d22wrappedPointCut<\/code>\u5c31\u975e\u5e38\u63a5\u8fd1\u771f\u76f8\u4e86\u3002\u5173\u952e\u7684\u4ee3\u7801\u5728\u8fd9\u91cc<\/a>\uff1a<\/p>\n
model.prototype[pointCut] = (function(_newName) {\r\n      return function wrappedPointCut() {\r\n        var Promise = PromiseProvider.get();\r\n\r\n        var _this = this;\r\n        \/* something omitted for simplicity *\/\r\n        var promise = new Promise.ES6(function(resolve, reject) {\r\n          args.push(function(error) {\r\n            if (error) {\r\n              \/* something omitted for simplicity *\/\r\n              reject(error);\r\n              return;\r\n            }\r\n            $results = Array.prototype.slice.call(arguments, 1);\r\n            resolve.apply(promise, $results);\r\n          });\r\n          _this[_newName].apply(_this, args);\r\n        });\r\n        if (fn) {\r\n          \/* something omitted for simplicity *\/\r\n          return promise.then(\r\n            function() {\r\n              process.nextTick(function() {\r\n                fn.apply(null, [null].concat($results));\r\n              });\r\n            },\r\n            function(error) {\r\n              process.nextTick(function() {\r\n                fn(error);\r\n              });\r\n            });\r\n        }\r\n        return promise;\r\n      };\r\n    })(newName);<\/pre>\n
\u6ce8\u610f\u5230\u5982\u679c\u6ca1\u6709fn<\/code>\uff0c\u90a3\u4e48\u4f1a\u5728\u7b2c 33 \u884c\u8fd4\u56de\u7b2c 7 \u884c\u5b9a\u4e49\u7684 promise\uff0c\u5982\u679c\u6709fn<\/code>\uff0c\u5c31\u4f1a\u76f4\u63a5\u5728\u7b2c 21 \u884c\u8fd4\u56de\u63a5\u7eed\u4e4b\u524d\u7684 promise \u7684\u53e6\u4e00\u4e2a promise\uff0c\u8fd9\u4e2a\u63a5\u7eed\uff08.then()<\/code>\uff09\u91cc\u9762\u5229\u7528\u4e86fn<\/code>\u5904\u7406\u4e86\u7ed3\u679c\uff0c\u5374\u6ca1\u6709\u8fd4\u56de\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u8fd9\u65f6\u5019\u7684\u8fd4\u56de\u503c\u662fPromise<undefined><\/code>\u800c\u4e0d\u662fPromise<this><\/code>\u2014\u2014\u6211\u4eec\u88ab\u8fd9\u6837\u7684 TypeScript \u7c7b\u578b\u5b9a\u4e49\u5751\u60e8\u4e86\uff01\u5982\u679c\u5b83\u4e00\u5f00\u59cb\u5c31\u544a\u8bc9\u6211\u4eec\u4f1a\u8fd9\u6837\uff0c\u90a3\u8be5\u591a\u597d\u5440\uff0c\u5c31\u50cf\u8fd9\u6837\uff1a<\/p>\n
    save(options: SaveOptions, fn: (err: any, product: this, numAffected: number) => void): Promise<undefined>;\r\n    save(fn: (err: any, product: this, numAffected: number) => void): Promise<undefined>;\r\n    save(options?: SaveOptions): Promise<this>;\r\n    save(): Promise<this>;<\/pre>\n
2017 \u5e74 5 \u6708 4 \u65e5<\/p>\n
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