如何处理NestJS中TypeORM实体字段唯一校验错误？

import { Entity, Column } from 'typeorm';

@Entity()
export class User {
  @Column({ unique: true })
  email: string;

  // 其他字段...
}

import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { Repository, QueryFailedError } from 'typeorm';
import { User } from './user.entity';

@Injectable()
export class UserService {
  constructor(
    @InjectRepository(User)
    private userRepository: Repository<User>,
  ) {}

  async createUser(user: User): Promise<User> {
    try {
      return await this.userRepository.save(user);
    } catch (error) {
      if (error instanceof QueryFailedError && error.code === '23505') {
        // 处理唯一校验错误
        // 返回适当的错误响应
      }
      throw error;
    }
  }
}