完成批卷保存错题集bug修改

school-paper/src/main/java/com/ruoyi/school/paper/service/impl/DbTestPaperRecordServiceImpl.java

@@ -8,6 +8,7 @@ import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.ruoyi.common.core.domain.PageQuery;
 import com.ruoyi.common.core.domain.R;
 import com.ruoyi.common.core.page.TableDataInfo;
+import com.ruoyi.common.utils.StringUtils;
 import com.ruoyi.school.paper.domain.DbErrorList;
 import com.ruoyi.school.paper.domain.DbTestPaperRecord;
 import com.ruoyi.school.paper.domain.bo.DbTestPaperBo;
@@ -183,7 +184,7 @@ public class DbTestPaperRecordServiceImpl implements IDbTestPaperRecordService {
 
         // 获取选择题错题集
         List<Long> collect = recordDetails.stream()
-            .filter(detail -> detail.getSpecies().equals(2) && !detail.getAnswer().equals(detail.getCorrectAnswer()))
+            .filter(detail -> detail.getSpecies().equals(2) && (StringUtils.isEmpty(detail.getAnswer()) || !detail.getAnswer().equals(detail.getCorrectAnswer())))
             .map(DbTestPaperRecordDetailVo::getQuestionBankId)
             .collect(Collectors.toList());
         // 创建错题列表对象