ValidationPipes 不适用于 Body 特定类型

问题描述

我有一个简单的问题。我正在尝试将 ValidationPipe 应用到我的一个端点，即 POST 这个端点的职责很简单 - 添加发票，但在此之前我想验证正文。

所以我这样做了：

invoice.dto.ts

import { ContractorDto } from './contractor.dto';
import { IncomeDto } from './income.dto';
import { ExpensesDto } from './expenses.dto';
import {
    IdValidator,PositionValidator,DateOfEventValidator,DescriptionValidator,RegistryValidator,ContractorValidator,IncomeValidator,ExpensesValidator,} from '../helpers/invoiceValidation.decorator';

export class InvoiceDto {
    @IdValidator() id: string;
    @PositionValidator() position: number;
    @DateOfEventValidator() dateOfEvent: string;
    @RegistryValidator() registry: string;
    @DescriptionValidator() description: string;
    @ContractorValidator() contractor: ContractorDto;
    @IncomeValidator() income: IncomeDto;
    @ExpensesValidator() expenses: ExpensesDto;
}

invoices.controller.ts

type XYZ = Omit<InvoiceDto,'id'>;

@Post('/add')
addInvoice(
    @Res() res: Response,@Body(
        new ValidationPipe({
            transform: true,disableErrorMessages: false,always: true,stopAtFirstError: true,validateCustomDecorators: true,skipMissingProperties: false,})
    )
    body: XYZ,// here is a problem,when I'm using InvoiceDto - validation works,but when i try to use Omit it doesnt work
) {
    // I dont neet to validate ID field because I will generate it on backend
    const invoice = this.invoicesService.addInvoice(body);
    return res.json(invoice);
}

invoiceValidation.decorator.ts

export function IdValidator() {
    return applyDecorators(
        IsDefined({ message: 'ID of an inovice is required!' }),Isstring({ message: 'ID must be a string!' }),Length(21,21,{ message: 'ID is not valid!' }),);
}

export function PositionValidator() {
    return applyDecorators(
        IsDefined({ message: 'Position of invoice is required!' }),IsNotEmpty(),IsInt({ message: 'Position of invoice must be a number' }),Min(1,{ message: 'Position of invoice must be greater than 0' }),);
}

export function DateOfEventValidator() {
    return applyDecorators(
        IsDefined({ message: 'Date of invoice event is required!' }),IsOnlyDate(),);
}

  // I've just add a couple of validators

GIST backup here

我认为问题是当我尝试对主体类型使用 Omit<SCHEMA,OMIT_VALUE> 时，我觉得我的验证器忽略了我的“省略主体类型”并传递所有数据。我将不胜感激任何帮助或建议

解决方法

如果您使用的是 Omit<T> 泛型，它将无法工作，因为 Typescript 无法反映泛型类型。您可以利用 @nestjs/mapperd-types 的 OmitType() mixin 为您创建一个新类。

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

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