Undefined type error. Make sure you are providing an explicit type for the "alerts" of the "AlertType" class.

[kasir-barati]

Describe the bug
So it is fairly simple, just have a 1:N relation between alert and alert type. Need to allow users to fetch:

• An alert with its alert type.
• An alert type with its alerts.

Have you read the Contributing Guidelines?

Yup.

To Reproduce
Clone my repo: https://github.com/kasir-barati/nestjs-materials

1. cd typeorm.
2. pnpm i --frozen-lockfile.
3. nx serve botprobe-nest

Expected behavior
Just start like it was before adding this piece of code in my alert-type.entity.ts:

https://github.com/kasir-barati/nestjs-materials/blob/0b712a5de535c7cb8204aa8eac5d9344af9afaa3/typeorm/apps/botprobe-nest/src/alert-type/entities/alert-type.entity.ts#L41-L45

Screenshots

Desktop (please complete the following information):

• Node Version: 22.12.0
• Nestjs-query Version: 8.0.0

Additional context

Error message in text:

/home/kasir/projects/nestjs-materials/typeorm/node_modules/.pnpm/@[email protected]_@[email protected][email protected][email protected]__zsrjvl6g7tdfe2t3vnfusw45sm/node_modules/@nestjs/graphql/dist/utils/reflection.utilts.js:17
            throw new undefined_type_error_1.UndefinedTypeError((0, lodash_1.get)(prototype, 'constructor.name'), propertyKey, index);
                  ^

Error: Undefined type error. Make sure you are providing an explicit type for the "alerts" of the "AlertType" class.
    at reflectTypeFromMetadata (/home/kasir/projects/nestjs-materials/typeorm/node_modules/.pnpm/@nestjs+graphql@12.2.2_@nestjs+common@10.4.15_class-transformer@0.5.1_class-validator@0.14.1__zsrjvl6g7tdfe2t3vnfusw45sm/node_modules/@nestjs/graphql/dist/utils/reflection.utilts.js:17:19)
    at applyMetadataFn (/home/kasir/projects/nestjs-materials/typeorm/node_modules/.pnpm/@nestjs+graphql@12.2.2_@nestjs+common@10.4.15_class-transformer@0.5.1_class-validator@0.14.1__zsrjvl6g7tdfe2t3vnfusw45sm/node_modules/@nestjs/graphql/dist/decorators/field.decorator.js:31:107)
    at singleCallFunctionWrapper (/home/kasir/projects/nestjs-materials/typeorm/node_modules/.pnpm/@nestjs+graphql@12.2.2_@nestjs+common@10.4.15_class-transformer@0.5.1_class-validator@0.14.1__zsrjvl6g7tdfe2t3vnfusw45sm/node_modules/@nestjs/graphql/dist/schema-builder/storages/lazy-metadata.storage.js:67:13)
    at /home/kasir/projects/nestjs-materials/typeorm/node_modules/.pnpm/@nestjs+graphql@12.2.2_@nestjs+common@10.4.15_class-transformer@0.5.1_class-validator@0.14.1__zsrjvl6g7tdfe2t3vnfusw45sm/node_modules/@nestjs/graphql/dist/schema-builder/storages/lazy-metadata.storage.js:41:44
    at Array.forEach (<anonymous>)
    at LazyMetadataStorageHost.load (/home/kasir/projects/nestjs-materials/typeorm/node_modules/.pnpm/@nestjs+graphql@12.2.2_@nestjs+common@10.4.15_class-transformer@0.5.1_class-validator@0.14.1__zsrjvl6g7tdfe2t3vnfusw45sm/node_modules/@nestjs/graphql/dist/schema-builder/storages/lazy-metadata.storage.js:41:26)
    at getFieldsAndDecoratorForType (/home/kasir/projects/nestjs-materials/typeorm/node_modules/.pnpm/@nestjs+graphql@12.2.2_@nestjs+common@10.4.15_class-transformer@0.5.1_class-validator@0.14.1__zsrjvl6g7tdfe2t3vnfusw45sm/node_modules/@nestjs/graphql/dist/schema-builder/utils/get-fields-and-decorator.util.js:16:49)
    at PartialType (/home/kasir/projects/nestjs-materials/typeorm/node_modules/.pnpm/@nestjs+graphql@12.2.2_@nestjs+common@10.4.15_class-transformer@0.5.1_class-validator@0.14.1__zsrjvl6g7tdfe2t3vnfusw45sm/node_modules/@nestjs/graphql/dist/type-helpers/partial-type.helper.js:18:107)
    at /home/kasir/projects/nestjs-materials/typeorm/node_modules/.pnpm/@ptc-org+nestjs-query-graphql@8.0.0_@apollo+gateway@2.9.3_encoding@0.1.13_graphql@16.9.0__@ne_fbjnmutqxhqvoxqdmvnas6ncgu/packages/query-graphql/src/resolvers/delete.resolver.ts:100:48
    at DeleteResolver (/home/kasir/projects/nestjs-materials/typeorm/node_modules/.pnpm/@ptc-org+nestjs-query-graphql@8.0.0_@apollo+gateway@2.9.3_encoding@0.1.13_graphql@16.9.0__@ne_fbjnmutqxhqvoxqdmvnas6ncgu/packages/query-graphql/src/resolvers/delete.resolver.ts:227:89)


 NX  Process exited with code 1, waiting for changes to restart...

I am kinda wondering if I am experiencing what they are talking about it here: https://stackoverflow.com/a/72300528/8784518

[kasir-barati]

I also read this issues but it seems that no one actually has experienced this issue, i.e. except me 😅.

#301
#307

[kasir-barati]

You can see that it works just fine in normal setup with NestJS: https://github.com/kasir-barati/bugs/tree/normal-one-to-many-rel

[kasir-barati]

I am trying to debug this issue with an example, but I am having a bit of trouble. It does not make sense to me that although I have said in my entities (written in TypeORM) that I wanna have a camelCase table name, and column name but in reality when I go to database container I can see it is in snake_case.

What in the world is happening here?

[TriPSs]

Took a quick look, but relations are not defined with @Field / @FilterableField, please check these docs

[kasir-barati]

I am trying to debug this issue with an example, but I am having a bit of trouble. It does not make sense to me that although I have said in my entities (written in TypeORM) that I wanna have a camelCase table name, and column name but in reality when I go to database container I can see it is in snake_case.

What in the world is happening here?

I had to tell that it MUST use the camelCase naming convention explicitly. But this goes against what is normal (for more details look at this).

import { Field, GraphQLISODateTime, ObjectType } from '@nestjs/graphql'
import { FilterableField } from '@ptc-org/nestjs-query-graphql'
import { Column, CreateDateColumn, Entity, JoinColumn, ManyToOne, PrimaryGeneratedColumn } from 'typeorm'
import { AlertType } from '../alert-type/alert-type.entity'

@ObjectType()
@Entity()
export class Alert {
  @Column('uuid', { name: 'userId' })
  @Field({ description: "Who's the creator of this alert" })
  @FilterableField()
  userId: string
}

[TriPSs]

You lost me here? If I understand you this is a issue with TypeORM and not this lib?

[kasir-barati]

If you ask me I would say some configuration somewhere is causing TypeORM to behave this way. But let's ignore it right now since it is not directly related to this issue.

BTW I am reading the docs ATM. Will update you here.

[kasir-barati]

Thanks to this comments I was able to pin point the issue and solve it (RTFM, I did not read it completely). This was a lesson I learned. First read the docs completely.

kasir-barati/nestjs-materials@4755f6a