PaperExercisesServiceImpl.java
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package com.meishu.service.impl;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.meishu.common.exception.HttpException;
import com.meishu.dto.paper.AddPaperExerciseDTO;
import com.meishu.mapper.PaperExercisesMapper;
import com.meishu.model.PaperExercisesDO;
import com.meishu.service.PaperExercisesService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.meishu.util.ConstantUtils;
import com.meishu.vo.exercise.LabelExercisesVO;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* <p>
* 考试-题目映射表 服务实现类
* </p>
*
* @author Tuyp
* @since 2023-07-11
*/
@Service
public class PaperExercisesServiceImpl extends ServiceImpl<PaperExercisesMapper, PaperExercisesDO> implements PaperExercisesService {
public List<LabelExercisesVO> exercises(PaperExercisesDO paperExercisesDO) {
return this.baseMapper.getPaperExercises(paperExercisesDO.getPaperId());
}
public String deletePaperExercise(LabelExercisesVO labelExercisesVO) {
this.baseMapper.deleteById(labelExercisesVO.getPaperExerciseId());
return ConstantUtils.DELETE_SUCCESS;
}
public String addPaperExercise(AddPaperExerciseDTO addPaperExerciseDTO) {
List<Long> exerciseIds = addPaperExerciseDTO.getExerciseIds();
for (Long exerciseId : exerciseIds){
int count = this.baseMapper.selectCount(new QueryWrapper<PaperExercisesDO>()
.lambda()
.eq(PaperExercisesDO::getPaperId,addPaperExerciseDTO.getPaperId())
.eq(PaperExercisesDO::getExerciseId,exerciseId));
PaperExercisesDO paperExercisesDO = new PaperExercisesDO();
paperExercisesDO.setPaperId(addPaperExerciseDTO.getPaperId());
paperExercisesDO.setExerciseId(exerciseId);
if (count > 0){
throw new HttpException(30002);
}
this.baseMapper.insert(paperExercisesDO);
}
return ConstantUtils.ADD_SUCCESS;
}
}