Question

我在Heroku上运行一个React / NodeJS项目。我第一次在Heroku上安装项目。部署运行正常，但随后出现以下错误：

[23 x 23 x 2 x 40]

cors已包含在我的依赖项中。所以不确定问题出在哪里。

nodeJS的package.json

 > ProductInventoryApp@1.0.0 start /app
2020-01-12T04:55:41.635051+00:00 app[web.1]: > node ./backend/app.js
2020-01-12T04:55:41.635053+00:00 app[web.1]:
2020-01-12T04:55:42.404864+00:00 app[web.1]: internal/modules/cjs/loader.js:800
2020-01-12T04:55:42.404909+00:00 app[web.1]: throw err;
2020-01-12T04:55:42.404911+00:00 app[web.1]: ^
2020-01-12T04:55:42.404913+00:00 app[web.1]:
2020-01-12T04:55:42.404916+00:00 app[web.1]: Error: Cannot find module 'CORS'
2020-01-12T04:55:42.404918+00:00 app[web.1]: Require stack:
2020-01-12T04:55:42.404921+00:00 app[web.1]: - /app/backend/app.js
2020-01-12T04:55:42.404923+00:00 app[web.1]: at Function.Module._resolveFilename (internal/modules/cjs/loader.js:797:15)
2020-01-12T04:55:42.404925+00:00 app[web.1]: at Function.Module._load (internal/modules/cjs/loader.js:690:27)
2020-01-12T04:55:42.404927+00:00 app[web.1]: at Module.require (internal/modules/cjs/loader.js:852:19)
2020-01-12T04:55:42.404929+00:00 app[web.1]: at require (internal/modules/cjs/helpers.js:74:18)
2020-01-12T04:55:42.404931+00:00 app[web.1]: at Object.<anonymous> (/app/backend/app.js:5:12)
2020-01-12T04:55:42.404933+00:00 app[web.1]: at Module._compile (internal/modules/cjs/loader.js:959:30)
2020-01-12T04:55:42.404935+00:00 app[web.1]: at Object.Module._extensions..js (internal/modules/cjs/loader.js:995:10)
2020-01-12T04:55:42.404937+00:00 app[web.1]: at Module.load (internal/modules/cjs/loader.js:815:32)
2020-01-12T04:55:42.404939+00:00 app[web.1]: at Function.Module._load (internal/modules/cjs/loader.js:727:14)
2020-01-12T04:55:42.404941+00:00 app[web.1]: at Function.Module.runMain (internal/modules/cjs/loader.js:1047:10)
2020-01-12T04:55:42.404943+00:00 app[web.1]: at internal/main/run_main_module.js:17:11 {
2020-01-12T04:55:42.404945+00:00 app[web.1]: code: 'MODULE_NOT_FOUND',
2020-01-12T04:55:42.404946+00:00 app[web.1]: requireStack: [ '/app/backend/app.js' ]
2020-01-12T04:55:42.404948+00:00 app[web.1]: }
2020-01-12T04:55:42.427634+00:00 app[web.1]: npm ERR! code ELIFECYCLE
2020-01-12T04:55:42.428331+00:00 app[web.1]: npm ERR! errno 1
2020-01-12T04:55:42.430180+00:00 app[web.1]: npm ERR! ProductInventoryApp@1.0.0 start: `node ./backend/app.js`
2020-01-12T04:55:42.430622+00:00 app[web.1]: npm ERR! Exit status 1

Answer 1

您需要将'包从cors移到devDependencies中。这是因为heroku在生产模式下运行您的节点应用程序，而在生产模式下未安装 devDependencies 。

在Heroku中找不到模块核心

1 个答案: