TypeError: Cannot read property 'properties' of undefined

[JasonJie]

$ nest start [Nest] 18065 - 2020-07-17 4:38:05 ├F10: PM┤ [NestFactory] Starting Nest application... [Nest] 18065 - 2020-07-17 4:38:05 ├F10: PM┤ [InstanceLoader] PostsModule dependencies initialized +26ms [Nest] 18065 - 2020-07-17 4:38:05 ├F10: PM┤ [InstanceLoader] AppModule dependencies initialized +1ms [Nest] 18065 - 2020-07-17 4:38:05 ├F10: PM┤ [InstanceLoader] AuthorsModule dependencies initialized +0ms [Nest] 18065 - 2020-07-17 4:38:05 ├F10: PM┤ [InstanceLoader] GraphQLSchemaBuilderModule dependencies initialized +1ms [Nest] 18065 - 2020-07-17 4:38:05 ├F10: PM┤ [InstanceLoader] GraphQLModule dependencies initialized +1ms [Nest] 18065 - 2020-07-17 4:38:05 ├F10: PM┤ [RoutesResolver] AppController {}: +5ms [Nest] 18065 - 2020-07-17 4:38:05 ├F10: PM┤ [RouterExplorer] Mapped {, GET} route +3ms (node:18065) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'properties' of undefined at TypeMetadataStorageHost.compileExternalFieldResolverMetadata (/Users/junjie/Jie/nestjs/demo/node_modules/@nestjs/graphql/dist/schema-builder/storages/type-metadata.storage.js:249:74) at /Users/junjie/Jie/nestjs/demo/node_modules/@nestjs/graphql/dist/schema-builder/storages/type-metadata.storage.js:239:22 at Array.forEach () at TypeMetadataStorageHost.compileFieldResolverMetadata (/Users/junjie/Jie/nestjs/demo/node_modules/@nestjs/graphql/dist/schema-builder/storages/type-metadata.storage.js:228:18) at TypeMetadataStorageHost.compile (/Users/junjie/Jie/nestjs/demo/node_modules/@nestjs/graphql/dist/schema-builder/storages/type-metadata.storage.js:143:14) at GraphQLSchemaFactory. (/Users/junjie/Jie/nestjs/demo/node_modules/@nestjs/graphql/dist/schema-builder/graphql-schema.factory.js:39:61) at Generator.next () at /Users/junjie/Jie/nestjs/demo/node_modules/tslib/tslib.js:114:75 at new Promise () at Object.__awaiter (/Users/junjie/Jie/nestjs/demo/node_modules/tslib/tslib.js:110:16) (node:18065) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2) (node:18065) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code. ✨ Done in 13.90s.

[kamilmysliwiec]

Please provide a minimum reproduction repository.

[JasonJie]

"dependencies": { "@nestjs/common": "^7.1.1", "@nestjs/core": "^7.1.1", "@nestjs/graphql": "^7.5.5", "@nestjs/platform-express": "^7.1.1", "apollo-server-express": "^2.15.1", "class-validator": "^0.12.2", "graphql": "^15.3.0", "graphql-tools": "^6.0.12", "lodash": "^4.17.19", "reflect-metadata": "^0.1.13", "rimraf": "^3.0.2", "rxjs": "^6.5.5", "type-graphql": "^1.0.0-rc.3" }, "devDependencies": { "@nestjs/cli": "^7.2.0", "@nestjs/schematics": "^7.0.0", "@nestjs/testing": "^7.1.1", "@types/express": "^4.17.6", "@types/jest": "^25.2.3", "@types/node": "^14.0.6", "@types/supertest": "^2.0.9", "@typescript-eslint/eslint-plugin": "^3.0.2", "@typescript-eslint/parser": "^3.0.2", "eslint": "^7.1.0", "eslint-config-prettier": "^6.11.0", "eslint-plugin-import": "^2.20.2", "jest": "^26.0.1", "prettier": "^2.0.5", "supertest": "^4.0.2", "ts-jest": "^26.1.0", "ts-loader": "^7.0.5", "ts-node": "^8.10.2", "tsconfig-paths": "^3.9.0", "typescript": "^3.9.3" },

@kamilmysliwiec

[JasonJie]

@kamilmysliwiec how can i fix this

[kamilmysliwiec]

We can't help without a minimum reproduction Github repository.

[WhatzzUp]

Hey, mate @JasonJie, I guess you updated your nestjs version from 6 to 7?

A few minutes ago I stepped into the same error and fixed it by reading @kamilmysliwiec migration guide at https://docs.nestjs.com/migration-guide#graphql

Following migration advice fixed my issue 🥳 :

In order to migrate your existing application, simply rename all the type-graphql imports to the @nestjs/graphql

May it helps, cheers

[nilscox]

Hi @kamilmysliwiec, I also have this error. Here is a repro repository: https://github.com/nilscox/repro-nestjs-graphql-field-resolver.

Just yarn and yarn start, and you should see the same error described above:

[Nest] 126369   - 07/27/2020, 4:49:08 PM   [NestFactory] Starting Nest application...
[Nest] 126369   - 07/27/2020, 4:49:08 PM   [InstanceLoader] AppModule dependencies initialized +12ms
[Nest] 126369   - 07/27/2020, 4:49:08 PM   [InstanceLoader] GraphQLSchemaBuilderModule dependencies initialized +1ms
[Nest] 126369   - 07/27/2020, 4:49:08 PM   [InstanceLoader] GraphQLModule dependencies initialized +0ms
(node:126369) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'properties' of undefined
    at TypeMetadataStorageHost.compileExternalFieldResolverMetadata (/tmp/test-graphql/node_modules/@nestjs/graphql/dist/schema-builder/storages/type-metadata.storage.js:249:74)
    at /tmp/test-graphql/node_modules/@nestjs/graphql/dist/schema-builder/storages/type-metadata.storage.js:239:22
    at Array.forEach (<anonymous>)
    at TypeMetadataStorageHost.compileFieldResolverMetadata (/tmp/test-graphql/node_modules/@nestjs/graphql/dist/schema-builder/storages/type-metadata.storage.js:228:18)
    at TypeMetadataStorageHost.compile (/tmp/test-graphql/node_modules/@nestjs/graphql/dist/schema-builder/storages/type-metadata.storage.js:143:14)
    at GraphQLSchemaFactory.<anonymous> (/tmp/test-graphql/node_modules/@nestjs/graphql/dist/schema-builder/graphql-schema.factory.js:39:61)
    at Generator.next (<anonymous>)
    at /tmp/test-graphql/node_modules/tslib/tslib.js:114:75
    at new Promise (<anonymous>)
    at Object.__awaiter (/tmp/test-graphql/node_modules/tslib/tslib.js:110:16)

Edit: Replacing "target": "es5" with "target": "es2017" in the tsconfig.json fixed the problem.

[tumainimosha]

Hi @nilscox did you get a solution to this. Facing similar issue

[nilscox]

I updated typescript's target to es2017. This fixed the problem for me. https://github.com/nilscox/repro-nestjs-graphql-field-resolver/compare/fixed

[piyushwork]

Hi @nilscox got the same issue and did what you suggested but it did not worked for me any other workaround or something else you would like to suggest ??

[nilscox]

Hello, I'm sorry it was a while ago, I don't have other tips for you.