1.service层 `import { Injectable } from '@nestjs/common';
import { CreateTransformDto } from './dto/create-transform.dto';
import { UpdateTransformDto } from './dto/update-transform.dto';
import { Repository } from 'typeorm';
import { Transform } from './entities/transform.entity';
import { moneylist } from './entities/moneylist.entity';
import { InjectRepository } from '@nestjs/typeorm';
@Injectable()
export class TransformService {
constructor(
@InjectRepository(Transform)
private readonly transformRepository: Repository,
@InjectRepository(moneylist)
private readonly moneylistRepository: Repository,
) {}
transform(params: { to: string; from: string; num: string }) {
this.transformRepository.manager.transaction(async (manager) => {
const fromMoney = await this.moneylistRepository.findOne({
where: { name: params.from },
});
const toMoney = await this.moneylistRepository.findOne({
where: { name: params.to },
});
if (fromMoney.money < toMoney.money) {
manager.save(moneylist, {
id: fromMoney.id,
money: fromMoney.money - Number(params.num),
});
manager.save(moneylist, {
id: toMoney.id,
money: toMoney.money + Number(params.num),
});
return {
massage: '转账成功！',
};
} else {
return {
massage: '转账成功！',
};
}
});
}
create(createTransformDto: CreateTransformDto) {
return 'This action adds a new transform';
}
findAll() {
return This action returns all transform;
}
findOne(id: number) {
return This action returns a #${id} transform;
}
update(id: number, updateTransformDto: UpdateTransformDto) {
return This action updates a #${id} transform;
}
remove(id: number) {
return This action removes a #${id} transform;
}
}`
