package com.dsh.course.service.impl;
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import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
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import com.dsh.course.entity.HotAddress;
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import com.dsh.course.entity.OpenCity;
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import com.dsh.course.mapper.HotAddressMapper;
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import com.dsh.course.service.IHotAddressService;
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import com.dsh.course.service.IOpenCityService;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import java.util.List;
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import java.util.Objects;
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@Service
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public class HotAddressServiceImpl extends ServiceImpl<HotAddressMapper, HotAddress> implements IHotAddressService {
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@Autowired
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private IOpenCityService openCityService;
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@Override
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public List<HotAddress> selectHotAddressByCityId(Integer cityId) {
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OpenCity openCity = openCityService.getBaseMapper().selectById(cityId);
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LambdaQueryWrapper<HotAddress> queryWrapper = new LambdaQueryWrapper<>();
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if(Objects.nonNull(cityId)) {
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queryWrapper.eq(HotAddress::getCityId,openCity.getCityId());
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}
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queryWrapper.last("limit 10");
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return this.baseMapper.selectList(queryWrapper);
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}
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}
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