NestJs class-validator accepts empty payload - nestjs

Question

I'm trying to create validator that accepts 2 values as strings (must exist, min/max length etc).
The issue I am facing is that when I POST empty payload the validation passes and TypeORM tries to insert null values and I end up with HTTP status 500.
When I POST with invalid payload the validation works properly.
I want to get proper validation errors as a response when payload is empty (existence of name property, min/max length etc...) ...
I tried adding various class annotations and global settings but no luck...
Global validation enabled:
app.useGlobalPipes(
new ValidationPipe({
whitelist: true,
forbidNonWhitelisted: true,
forbidUnknownValues: true,
skipMissingProperties: false, //Thought this would check for missing properties
transform: true,
}),
);
Entity:
#Entity('r_cat')
export class ResearchCategory {
[...]
#PrimaryGeneratedColumn()
id: number;
#ApiProperty({
description: 'Name of the category',
example: 'Analytics, Integration',
})
#Column('text')
#IsString()
#ApiProperty()
#Length(2, 30)
#IsNotEmpty()
#IsDefined()
name: string;
[...]
My request object (DTO):
export class CreateResearchCategoryRequest extends PartialType(
OmitType(ResearchCategory, ['created_at', 'updated_at', 'deleted_at'] as const),
) {}
Controller:
#Post()
public async create(
#Req() req,
#Body() researchCategory: CreateResearchCategoryRequest,
): Promise<ResearchCategory> {
return await this.service.createNew(researchCategory, req.user);
}

Answer 1

I'm not sure this is the correct way to create a DTO based on the repository class. The usage of the mapper is different from what you've done since Nest examples show is all based on another DTO class, not a repository class.
However, I think the following snippet should work in your situation:
export class CreateResearchCategoryRequest extends OmitType(
ResearchCategory, ['created_at', 'updated_at', 'deleted_at'] as const
) {}