How do you handle exceptions from the service provider? For example, I have this service "UserService.ts":
import { Injectable } from '@nestjs/common'; import { InjectRepository } from '@nestjs/typeorm'; import { Repository } from 'typeorm'; import { User } from './users.entity'; import * as bcrypt from 'bcrypt'; import { CreateUserDto } from './dto/create-user.dto'; import { AuthenticateUserDto } from './dto/authenticate-user.dto' @Injectable() export class UsersService { constructor( @InjectRepository(User) private readonly userRepository: Repository<User>, ) {} async register(createUserDto: CreateUserDto): Promise<User | undefined> { const user = new User(); const saltRounds = 10; user.username = createUserDto.username; user.email = createUserDto.email; user.password = bcrypt.hashSync(createUserDto.password, saltRounds) return this.userRepository.save(user); } } How do I handle exceptions generated from "register" method? For example, if there is an exception caused by unique constraint when I insert a value.
Currently I am using Interceptor Exception Mapping on the controller method, but I feel it is not quite intuitive yet for me.
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