优惠券

src/main/java/com/qmrb/system/service/impl/CouponServiceImpl.java

@@ -121,6 +121,11 @@ public class CouponServiceImpl extends ServiceImpl<CouponMapper, Coupon> impleme
         if (form.getContractId() != null) {
             Contract contract = contractService.getById(form.getContractId());
             Assert.isTrue(contract != null, "关联协议数据不存在");
+
+            // 校验协议用户是否还有优惠券
+            Long count = this.count(new LambdaQueryWrapper<Coupon>().eq(Coupon::getContractId, form.getContractId()));
+            Assert.isTrue(count != null && count < contract.getMaxCouponCount(), "优惠券已领完");
+
             SysUser user = userService.getOne(new LambdaQueryWrapper<SysUser>().eq(SysUser::getContractId, form.getContractId()));
             Assert.isTrue(user != null, "关联协议用户数据不存在");
             form.setFromUserId(user.getId());