TypeError: Cannot read property 'size' of undefined

[ronkorland]

How frequently does the bug occur?

Always

Description

realm: 12.6.2
@realm/react: 0.6.2

I created one react-native page inside react-router; the page uses the useQuery hook to query my model.
When I open the page, I always get the following error:
TypeError: Cannot read property 'size' of undefined

Stacktrace & log output

get (Results.js:62)
getOwnPropertyDescriptor (OrderedCollection.js:62)
set (OrderedCollection.js:51)
Results (Results.js:33)
objects (Realm.js:691)
getObjects (index.cjs:151)
anonymous (index.cjs:182)
mountMemo (ReactNativeRenderer-dev.js:11819)
useMemo (ReactNativeRenderer-dev.js:12275)
useMemo (react.development.js:1650)
useQuery (index.cjs:181)
RealmDbPage (MainPage.tsx:30)
renderWithHooks (ReactNativeRenderer-dev.js:10867)
mountIndeterminateComponent (ReactNativeRenderer-dev.js:14789)
beginWork (ReactNativeRenderer-dev.js:16628)
beginWork$1 (ReactNativeRenderer-dev.js:22324)
performUnitOfWork (ReactNativeRenderer-dev.js:21471)
workLoopSync (ReactNativeRenderer-dev.js:21398)
renderRootSync (ReactNativeRenderer-dev.js:21369)
performSyncWorkOnRoot (ReactNativeRenderer-dev.js:21020)
flushSyncCallbacks (ReactNativeRenderer-dev.js:6262)
flushSyncCallbacksOnlyInLegacyMode (ReactNativeRenderer-dev.js:6241)
batchedUpdates$1 (ReactNativeRenderer-dev.js:21076)
batchedUpdates (ReactNativeRenderer-dev.js:2750)
_receiveRootNodeIDEvent (ReactNativeRenderer-dev.js:2892)
receiveTouches (ReactNativeRenderer-dev.js:3012)
__callFunction (MessageQueue.js:433)
anonymous (MessageQueue.js:113)
__guard (MessageQueue.js:365)
callFunctionReturnFlushedQueue (MessageQueue.js:112)

Can you reproduce the bug?

Always

Reproduction Steps

No response

Version

12.6.2

What services are you using?

Local Database only

Are you using encryption?

No

Platform OS and version(s)

Android 13

Build environment

Which debugger for React Native: Flipper

Cocoapods version

No response

[sync-by-unito]

➤ PM Bot commented:

Jira ticket: RJS-2805

[kneth]

@ronkorland Please provide a reproduction case or at least a stack trace.

[ronkorland]

@kneth the following stack trace is not enough?

get (Results.js:62)
getOwnPropertyDescriptor (OrderedCollection.js:62)
set (OrderedCollection.js:51)
Results (Results.js:33)
objects (Realm.js:691)
getObjects (index.cjs:151)
anonymous (index.cjs:182)
mountMemo (ReactNativeRenderer-dev.js:11819)
useMemo (ReactNativeRenderer-dev.js:12275)
useMemo (react.development.js:1650)
useQuery (index.cjs:181)
RealmDbPage (MainPage.tsx:30)
renderWithHooks (ReactNativeRenderer-dev.js:10867)
mountIndeterminateComponent (ReactNativeRenderer-dev.js:14789)
beginWork (ReactNativeRenderer-dev.js:16628)
beginWork$1 (ReactNativeRenderer-dev.js:22324)
performUnitOfWork (ReactNativeRenderer-dev.js:21471)
workLoopSync (ReactNativeRenderer-dev.js:21398)
renderRootSync (ReactNativeRenderer-dev.js:21369)
performSyncWorkOnRoot (ReactNativeRenderer-dev.js:21020)
flushSyncCallbacks (ReactNativeRenderer-dev.js:6262)
flushSyncCallbacksOnlyInLegacyMode (ReactNativeRenderer-dev.js:6241)
batchedUpdates$1 (ReactNativeRenderer-dev.js:21076)
batchedUpdates (ReactNativeRenderer-dev.js:2750)
_receiveRootNodeIDEvent (ReactNativeRenderer-dev.js:2892)
receiveTouches (ReactNativeRenderer-dev.js:3012)
__callFunction (MessageQueue.js:433)
anonymous (MessageQueue.js:113)
__guard (MessageQueue.js:365)
callFunctionReturnFlushedQueue (MessageQueue.js:112)

[Mitch528]

I have the same issue. Seems to have happened after upgrading to react-native 0.74.

[ronkorland]

I'm using react-native: 0.73.6 but I have the same issue

[Mitch528]

I'm using react-native: 0.73.6 but I have the same issue

@ronkorland

do you have this@babel/plugin-transform-private-methods in your babel config? That seems to have been the cause, at least it was for me.

I fixed it by removing it and adding this to my config instead:

  overrides: [
    {
      exclude: /node_modules\/realm\//,
      plugins: [['@babel/plugin-transform-private-methods', { loose: true }]],
    },
  ],

[ronkorland]

I'm using react-native: 0.73.6 but I have the same issue

@ronkorland

do you have this@babel/plugin-transform-private-methods in your babel config? That seems to have been the cause, at least it was for me.

I fixed it by removing it and adding this to my config instead:

  overrides: [
    {
      exclude: /node_modules\/realm\//,
      plugins: [['@babel/plugin-transform-private-methods', { loose: true }]],
    },
  ],

Thanks for reply, me babel config looks like this:

module.exports = {
  presets: [["module:@react-native/babel-preset"]],
  env: {
    production: {
      plugins: ["react-native-paper/babel"],
    },
  },
  plugins: [
    "@realm/babel-plugin",
    "babel-plugin-transform-typescript-metadata",
    ["@babel/plugin-proposal-decorators", { legacy: true }],
    ["@babel/plugin-transform-class-properties", { loose: true }],
    ["@babel/plugin-transform-private-property-in-object", { loose: true }],
  ],
  overrides: [
    {
      exclude: /node_modules\/realm\//,
      plugins: [["@babel/plugin-transform-private-methods", { loose: true }]],
    },
  ],
};

But I still have the same error.

[Mitch528]

@ronkorland

did you reset the cache after editing the config file?

react-native start --reset-cache

[ronkorland]

@Mitch528 I try now with the reset cache but I still have the same error

[vijaykharage7]

Hello @ronkorland did you happen to resolve this issue?

[ronkorland]

No

[alexandrubichis]

Hello. Is any update on this issue?

[alexandrubichis]

Hello. After upgrading react-native from 0.73.5 to 0.74.1 I encounter the same error. My error was because of module:metro-react-native-babel-preset from babel config preset instead of module:@react-native/babel-preset. No need to install @babel/plugin-transform-private-methods package because is installed as dependency from @babel/preset-env.

package.json:

{
  "name": "Test",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "android": "react-native run-android",
    "ios": "react-native run-ios",
    "lint": "eslint .",
    "start": "react-native start",
    "test": "jest"
  },
  "dependencies": {
    "react": "18.2.0",
    "react-native": "0.74.1",
    "realm": "12.6.2"
  },
  "devDependencies": {
    "@babel/core": "^7.20.0",
    "@babel/preset-env": "^7.20.0",
    "@babel/runtime": "^7.20.0",
    "@react-native/babel-preset": "0.74.83",
    "@react-native/eslint-config": "0.74.83",
    "@react-native/metro-config": "0.74.83",
    "@react-native/typescript-config": "0.74.83",
    "@types/react": "^18.2.6",
    "@types/react-test-renderer": "^18.0.0",
    "babel-jest": "^29.6.3",
    "eslint": "^8.19.0",
    "jest": "^29.6.3",
    "prettier": "2.8.8",
    "react-test-renderer": "18.2.0",
    "typescript": "5.0.4"
  },
  "engines": {
    "node": ">=18"
  }
}

babel.config.js:

module.exports = {
  presets: ['module:@react-native/babel-preset'],
};

[davide-ciraolo]

Hello everyone, I've tried to figure it out this problem in last days but without success so far. The only thing that did work for me was to modify the code of the module from:

...
get length() {
    return this.internal.size();
}
...

to:

...
get length() {
    return this.internal ? this.internal.size() : 0;
}
...

in node_modules/realm/dist/bundle.react-native.js file.
Strangely enough, trying the official expo-example (https://github.com/realm/realm-js/tree/main/templates/expo-template), the library does work without issues. I've tried to configure my project with the exact same packages but the issue was still there until I made this change. I don't know if the issue is really code-related, but I think the target file to update to make this change is this one https://github.com/realm/realm-js/blob/v12.0.0/packages/realm/src/Results.ts (lines 78 to 80). Let me know what you think about it.