Heroku：找不到模块“pg”？

Question

2021-03-19T16:05:15.937220+00:00 app[web.1]：错误：找不到模块“pg”

2021-03-19T16:05:15.937220+00:00 应用程序 [web.1]：需要堆栈：

2021-03-19T16:05:15.937220+00:00 应用程序 [web.1]:-/app/models/db_schema.js

2021-03-19T16:05:15.937221+00:00 应用程序 [web.1]: - /app/controllers/event_controller.js

2021-03-19T16:05:15.937221+00:00 应用 [web.1]: - /app/router/event_routes.js

2021-03-19T16:05:15.937221+00:00 应用 [web.1]: - /app/app.js

这是我的 package.json

{

“名称”：“后端”，

“版本”：“1.0.0”，

“描述”： ””，

“主”：“app.js”，

“引擎”： {

"node": "v14.12.0",

"npm": "6.14.8"

},

“脚本”：{

"test": "echo \"Error: no test specified\" && exit 1",

"start": "node app.js",

"start:dev": "nodemon app.js",

"heroku-postbuild": "cd frontend && npm install && npm run build"

},

“存储库”：{

"type": "git",

"url": "git+https://github.com/shivamsouravjha/shawn-the-sheep.git"

},

“作者”：“shivam”，

“许可证”：“ISC”，

“错误”：{

"url": "https://github.com/shivamsouravjha/shawn-the-sheep/issues"

},

“主页”：“https://github.com/shivamsouravjha/shawn-the-sheep#readme”，

“开发依赖”：{

"nodemon": "^2.0.7",


"pg": "^8.5.1",

"router": "^1.3.5"

},

“依赖”：{

"cors": "^2.8.5",

"dotenv": "^8.2.0",

"express": "^4.17.1",

"express-validator": "^6.10.0"

}

}

Answer 1

所以文件结构是：

/应用程序

----app.js

----node_modules/

还需要将 pg 从 devDependencies 移动到 Dependencies 并运行 npm run build。