我試圖部署MEAN應用的Heroku，但由於不能推到以下錯誤：無法獲得MEAN應用程序部署到Heroku的，因爲「沒有默認語言可以爲這個應用程序進行檢測。」

!  No default language could be detected for this app. 
     HINT: This occurs when Heroku cannot detect the buildpack to use for this application automatically. 
     See https://devcenter.heroku.com/articles/buildpacks 
!  Push failed

我嘗試設置的node.js buildpack與buildpack發佈了他們最新的節點，但剛收到另一個錯誤：

failed to detect buildpack

這是我第一次部署的Heroku，所以我全新這個。

這裏是我的package.jsons：

服務器

{ 
    "version": "0.0.0", 
    "private": true, 
    "scripts": { 
    "start": "node ./bin/www" 
    }, 
    "dependencies": { 
    "bcrypt": "^1.0.2", 
    "body-parser": "^1.16.1", 
    "cookie-parser": "^1.4.3", 
    "cors": "^2.8.2", 
    "debug": "^2.6.3", 
    "ejs": "~2.5.5", 
    "express": "^4.14.1", 
    "jsonwebtoken": "^7.3.0", 
    "mongoose": "^4.9.2", 
    "morgan": "^1.7.0", 
    "multer": "^1.3.0", 
    "passport": "^0.3.2", 
    "passport-jwt": "^2.2.1", 
    "request": "^2.81.0", 
    "request-promise": "^4.2.0", 
    "serve-favicon": "^2.3.2" 
    } 
}

客戶

{ 
    "version": "0.0.0", 
    "license": "MIT", 
    "scripts": { 
    "ng": "ng", 
    "start": "ng serve", 
    "build": "ng build", 
    "test": "ng test", 
    "lint": "ng lint", 
    "e2e": "ng e2e" 
    }, 
    "private": true, 
    "dependencies": { 
    "@angular/common": "^2.4.0", 
    "@angular/compiler": "^2.4.0", 
    "@angular/core": "^2.4.0", 
    "@angular/forms": "^2.4.0", 
    "@angular/http": "^2.4.0", 
    "@angular/platform-browser": "^2.4.0", 
    "@angular/platform-browser-dynamic": "^2.4.0", 
    "@angular/router": "^3.4.0", 
    "@types/googlemaps": "^3.26.8", 
    "@types/jquery": "^2.0.43", 
    "@types/lodash": "^4.14.62", 
    "@types/underscore": "^1.8.0", 
    "amcharts3-angular2": "github:amcharts/amcharts3-angular2", 
    "angular2-google-maps": "^0.17.0", 
    "core-js": "^2.4.1", 
    "dotenv": "^4.0.0", 
    "jquery": "^3.2.1", 
    "lodash": "^4.17.4", 
    "ng2-google-charts": "^2.1.0", 
    "rxjs": "^5.1.0", 
    "tslint": "^4.4.2", 
    "typescript": "^2.0.10", 
    "underscore": "^1.8.3", 
    "zone.js": "^0.7.6" 
    }, 
    "devDependencies": { 
    "@angular/cli": "1.0.0-rc.0", 
    "@angular/compiler-cli": "^2.4.0", 
    "@types/jasmine": "2.5.38", 
    "@types/node": "~6.0.60", 
    "codelyzer": "~2.0.0", 
    "jasmine-core": "~2.5.2", 
    "jasmine-spec-reporter": "~3.2.0", 
    "karma": "~1.4.1", 
    "karma-chrome-launcher": "~2.0.0", 
    "karma-cli": "~1.0.1", 
    "karma-jasmine": "~1.1.0", 
    "karma-jasmine-html-reporter": "^0.2.2", 
    "karma-coverage-istanbul-reporter": "^0.2.0", 
    "protractor": "~5.1.0", 
    "ts-node": "~2.0.0", 
    "tslint": "~4.4.2", 
    "typescript": "~2.0.0" 
    } 
}

爲什麼不的Heroku檢測節點？

來源

2017-05-31 universesurfer

按照Heroku documentation

To determine how to start your app, Heroku first looks for a Procfile. If no Procfile exists for a Node.js app, we will attempt to start a default web process via the start script in your package.json.

所以，你應該不需要設置生成包。

來源

2017-05-31 20:42:24

嗯，好的。我安裝它，因爲我最初收到此錯誤：！這個應用程序沒有檢測到默認語言。 \t \t \t提示：Heroku無法自動檢測到此應用程序使用的buildpack時發生。 \t \t \t查看https://devcenter.heroku.com/articles/buildpacks ！推送失敗 – universesurfer

嘗試在'package.json'中設置啓動腳本。像''腳本「：{」start「：」node server.js「}'。 –

我添加了我的package.jsons，以便人們可以看到我的依賴關係。我嘗試更改腳本開始，但不斷收到相同的錯誤。 – universesurfer

我有兩個package.jsons，一個用於客戶端，一個用於服務器。我需要將我的服務器依賴項放入根文件夾（它們分別嵌套在客戶端和服務器文件夾中）。將它移入根目錄可以通過heroku進行檢測。當然，現在我有一個新的錯誤。 :)

來源

2017-06-05 19:55:07 universesurfer

無法獲得MEAN應用程序部署到Heroku的，因爲「沒有默認語言可以爲這個應用程序進行檢測。」

服務器

客戶

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