realm-js: Missing Realm constructor. Did you run "react-native link realm"?

Android is ok

I got it working by: for both iOS AND android

having the auto-linking disabled in the config file

OSX 10.15 RN 0.61.2 REALM 3.2.0

dragged this two XCODE and deleted the test target in RealmJS.xcodeproj

added the libRealmReact.a file in link binaries with libraries

Good day guys.

I am having this error on an android simulator. what’s wrong?

@kneth, so let us know, the developers are waiting for their projects to be developed and so on.

you should add a migration guide for >3.4.0 I’m still trying to figure it out, but it throws error of double symbols or shows Missing Realm constructor

I believe it is related to #2460 - and we are working on it.

@rizwanatta Thank you for the recipe.

I got it working by: for both iOS AND android

having the auto-linking disabled in the config file

OSX 10.15 RN 0.61.2 REALM 3.2.0

dragged this two XCODE and deleted the test target in RealmJS.xcodeproj

added the libRealmReact.a file in link binaries with libraries

Do it according to your documents. It’s OK. Thank you！

“react-native”: “0.61.2”, “realm”: “^3.5.0”,

If run $ react-native run-ios - its ok

If run project in xCode to simmulator - Error: Missing Realm constructor. Did you run “pod install”? Please see https://realm.io/docs/react-native/latest/#missing-realm-constructor for troubleshooting

If remove folder ios/build and again run project in xCode - again Error “Missing Realm constructor” and folder ios/build is empty

UPD: Go to xCode menu Product -> Clean Build Folder - Yesssss YO!
Its work

@rasos We don’t yet support node v12. Try to downgrade to node v10.

I give up, I used version 2.29.1 finally I succeeded

I was able to make it work for me.

dependencies: { “react”: “16.8.6”, “react-native”: “0.60.5”, “realm”: “3.2.0”, // 3.3.0 not working }

1. Create file react-native.config.js in root folder (I think this step is not necessary, but it prevent error messages)

module.exports = {
    dependencies: {
        'realm': {
            platforms: {
                ios: null,
            },
        },
    },
}

In xcode: 2. Add libraries: node_modules\realm\react-native\ios\RealmReact.xcodeproj node_modules\realm\src\RealmJS.xcodeproj

1. Deal with issue with signing in target RealmJSTests. I choose the Team for Sign certificate, but I think also the option is simple delete this target.

2. Link binary from pervious added libraries: libRealmJS.a and libRealmReact.a

Thanks this https://github.com/realm/realm-js/issues/2549#issuecomment-539239010 and this https://github.com/realm/realm-js/issues/2460#issuecomment-543905035 messages

I deleted the build directory under the android directory, ran react-native run-android and it cleared up the error.

I fixed it by cleaning the Gradle. Go into the android folder of your react-native app

// the android folder
cd android

// clean
gradlew.bat clean

// when finished
npm run android

@rizwanatta Thank you for the recipe.

Downgrading to node 10 allowed me to install realm

sudo n 10 
npm install --save realm

https://github.com/realm/realm-js/issues/2582#issuecomment-548282235

I was able to make it work for me.

dependencies: { “react”: “16.8.6”, “react-native”: “0.60.5”, “realm”: “3.2.0”, // 3.3.0 not working }

1. Create file react-native.config.js in root folder (I think this step is not necessary, but it prevent error messages)

module.exports = {
    dependencies: {
        'realm': {
            platforms: {
                ios: null,
            },
        },
    },
}

In xcode: 2. Add libraries: node_modules\realm\react-native\ios\RealmReact.xcodeproj node_modules\realm\src\RealmJS.xcodeproj

1. Deal with issue with signing in target RealmJSTests. I choose the Team for Sign certificate, but I think also the option is simple delete this target.
2. Link binary from pervious added libraries: libRealmJS.a and libRealmReact.a

Thanks this #2549 (comment) and this #2460 (comment) messages

ok,thanks ，I will try later