Please follw the below steps:

git clone https://github.com/vipinkavlar/node-express-typescript-mongodb-swagger.git
cd node-express-typescript-mongodb-swagger
npm install
npm run dev

Swagger documentation sample can be found at http://localhost:<port>/api-docs

Input validation is done through class-validator. The decorators are defined in src/dtos files. Two middleware can be used to process error responses.

1. ../middlewares/validation.middleware
2. ../middlewares/validationJsonResponse.middleware

validationJsonResponse will output the response in JSON format as given below:

{
	message : null,
	data: null,
	errorCode : 201
	errorMessages : {
		"email": {
			"isNotEmpty": "email should not be empty",
			"isEmail": "email must be an email"
		},
		"password": {
			"isString": "password must be a string"
		}
	}
}

validationMiddleware sends HTTP response. Usage of both middlewares can be seen in the routes/user.route.ts file