新增优惠券

文章目录

- 概要
- 整体架构流程
- 技术细节
- 小结

概要

接口分析

一个基本的新增接口，按照Restful风格设计即可，关键是请求参数。之前表分析时已经详细介绍过这个页面及其中的字段，这里不再赘述。

需要特别注意的是，如果优惠券限定了使用范围，则需要保存限定的课程分类。而这些信息不再coupon表，而是一张中间关系表：coupon_scope

需求分析以及接口设计

技术细节

1.Controller层

package com.tianji.promotion.controller;import com.tianji.promotion.domain.dto.CouponFormDTO;
import com.tianji.promotion.service.ICouponService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.RequiredArgsConstructor;
import org.springframework.web.bind.annotation.*;import javax.validation.Valid;
import java.util.List;@RestController
@RequiredArgsConstructor
@RequestMapping("/coupons")
@Api(tags = "优惠券相关接口")
public class CouponController {private final ICouponService couponService;@ApiOperation("新增优惠券接口")@PostMappingpublic void saveCoupon(@RequestBody @Valid CouponFormDTO dto){couponService.saveCoupon(dto);}
}

2.Service层:

package com.tianji.promotion.service.impl;import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.tianji.promotion.mapper.CouponMapper;
import com.tianji.promotion.service.ICouponScopeService;
import com.tianji.promotion.service.ICouponService;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;import java.util.*;
import java.util.stream.Collectors;@Service
@RequiredArgsConstructor
public class CouponServiceImpl extends ServiceImpl<CouponMapper, Coupon> implements ICouponService {private final ICouponScopeService scopeService;@Override@Transactionalpublic void saveCoupon(CouponFormDTO dto) {// 1.保存优惠券// 1.1.转POCoupon coupon = BeanUtils.copyBean(dto, Coupon.class);// 1.2.保存save(coupon);if (!dto.getSpecific()) {// 没有范围限定return;}Long couponId = coupon.getId();// 2.保存限定范围List<Long> scopes = dto.getScopes();if (CollUtils.isEmpty(scopes)) {throw new BadRequestException("限定范围不能为空");}// 2.1.转换POList<CouponScope> list = scopes.stream().map(bizId -> new CouponScope().setBizId(bizId).setCouponId(couponId)).collect(Collectors.toList());// 2.2.保存scopeService.saveBatch(list);}
}

3.Mapper层