ValidationPipes do not support specific body types

Just a quick question: I'm working on applying a ValidationPipe to a POST endpoint responsible for adding an invoice. Before adding the invoice, I need to validate the body.

Here is what I have done:

invoice.dto.ts

import { ContractorDto } from './contractor.dto';
import { IncomeDto } from './income.dto';
import { ExpensesDto } from './expenses.dto'; 
// Code continues...

export class InvoiceDto {
    // Code continues...
}

invoices.controller.ts

type XYZ = Omit<InvoiceDto, 'id'>;
// Code continues...

invoiceValidation.decorator.ts

// Code continues...

Link to GIST Here

I'm facing an issue when trying to use Omit<SCHEMA, OMIT_VALUE> on the body type, as it seems like my validator is ignoring the omit type and passing all data through. Any help or advice would be greatly appreciated.

Answer №1

If you need to exclude certain properties using the Omit<T> generic, be aware that it may not work in Typescript due to its inability to reflect generic types. Instead, consider utilizing @nestjs/mapped-types's OmitType() mixin to create a new class.

export class OmitSchema extends OmitType(SchemaClass, ['fields', 'to', 'emit'] as const) {}

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