33 lines
919 B
TypeScript
33 lines
919 B
TypeScript
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import { plainToClass } from 'class-transformer';
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import { validate, ValidationError } from 'class-validator';
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import * as express from 'express';
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import { NextFunction, Request, Response } from 'express';
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import { HttpException } from '../exceptions/index';
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export function validationMiddleware<T>(
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type: any,
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skipMissingProperties = false,
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): express.RequestHandler {
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return (request: Request, response: Response, next: NextFunction) => {
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validate(
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plainToClass(type, {
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...request.body,
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...request.query,
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...request.params,
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}),
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{
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skipMissingProperties,
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},
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).then((errors: ValidationError[]) => {
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if (errors.length > 0) {
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const message = errors.map((error: ValidationError) =>
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Object.values(error.constraints),
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);
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next(new HttpException(400, message));
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} else {
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next();
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}
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});
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};
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}
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