RN - Unable to resolve module fs from node_modules/dotenv/lib/main.js in 0.2.26

[nexorianus]

Issue type:

[X] bug report
[ ] feature request
[ ] documentation issue

Database system/driver:

[ ] cordova
[ ] mongodb
[ ] mssql
[ ] mysql / mariadb
[ ] oracle
[ ] postgres
[ ] cockroachdb
[ ] sqlite
[ ] sqljs
[X] react-native
[ ] expo

TypeORM version:

[ ] latest
[ ] @next
[X] 0.2.26 (or put your version here)

Steps to reproduce or a small repository showing the problem:

in a react-native app installing and using typeorm at version 0.2.26 results in a crash with metro:

[Tue Sep 22 2020 10:47:30.971]  BUNDLE  ./index.js 

error: Error: Unable to resolve module 'fs' from 'node_modules/dotenv/lib/main.js': fs could not be found within the project.

If you are sure the module exists, try these steps:
 1. Clear watchman watches: watchman watch-del-all
 2. Delete node_modules: rm -rf node_modules and run yarn install
 3. Reset Metro's cache: yarn start --reset-cache
 4. Remove the cache: rm -rf /tmp/metro-*
    at ModuleResolver.resolveDependency (/path/node_modules/metro/src/node-haste/DependencyGraph/ModuleResolution.js:186:15)
    at ResolutionRequest.resolveDependency (/path/node_modules/metro/src/node-haste/DependencyGraph/ResolutionRequest.js:52:18)
    at DependencyGraph.resolveDependency (/path/node_modules/metro/src/node-haste/DependencyGraph.js:287:16)
    at Object.resolve (/path/node_modules/metro/src/lib/transformHelpers.js:267:42)
    at /path/node_modules/metro/src/DeltaBundler/traverseDependencies.js:434:31
    at Array.map (<anonymous>)
    at resolveDependencies (/path/node_modules/metro/src/DeltaBundler/traverseDependencies.js:431:18)
    at /path/node_modules/metro/src/DeltaBundler/traverseDependencies.js:275:33
    at Generator.next (<anonymous>)
    at asyncGeneratorStep (/path/node_modules/metro/src/DeltaBundler/traverseDependencies.js:87:24)

$ yarn why dotenv
yarn why v1.22.5
[1/4] 🤔  Why do we have the module "dotenv"...?
[2/4] 🚚  Initialising dependency graph...
[3/4] 🔍  Finding dependency...
[4/4] 🚡  Calculating file sizes...
=> Found "dotenv@6.2.0"
info Reasons this module exists
   - "typeorm" depends on it
   - Hoisted from "typeorm#dotenv"
info Disk size without dependencies: "68KB"
info Disk size with unique dependencies: "68KB"
info Disk size with transitive dependencies: "68KB"
info Number of shared dependencies: 0
✨  Done in 1.34s.

(in typeorm@0.2.25 i get the error Unable to resolve module urlfromnode_modules/typeorm/browser/util/OrmUtils.js`` wich i wont get in 0.2.26)

I temporary switched back to 0.2.24 what resolves the issues.

My guess is, that a new version of dotenv is requireing the fs moudle, what makes it uncompatible with react-native - what makes typeorm incompatible with RN itself.

[imnotjames]

This is related to #6739

[imnotjames]

@nexorianus has this been fixed in 0.2.27?

[imnotjames]

As far as we can tell - this should be fixed as of the latest release.

[nexorianus]

sry, didnt work on the app since.
will test tomorrow.