优化

ruoyi-system/src/main/java/com/ruoyi/wgz/service/IWgzQuestionSavePdfService.java

@@ -62,4 +62,7 @@ public interface IWgzQuestionSavePdfService extends IServicePlus<WgzQuestionSave
 
 	//根据当前用户ID查询用户试卷存储pdf
 	WgzQuestionSavePdf queryByUserId(Long userId);
+
+	//根据当前用户ID删除用户试卷存储pdf
+	Boolean deleteByUserId(Long userId);
 }

ruoyi-system/src/main/java/com/ruoyi/wgz/service/impl/WgzQuestionSavePdfServiceImpl.java

@@ -95,4 +95,21 @@ public class WgzQuestionSavePdfServiceImpl extends ServicePlusImpl<WgzQuestionSa
 		lqw.eq(WgzQuestionSavePdf::getUserId, userId);
 		return  baseMapper.selectOne(lqw);
 	}
+
+	@Override
+	public Boolean deleteByUserId(Long userId) {
+		//1、查询数据
+		WgzQuestionSavePdf wgzQuestionSavePdf = queryByUserId(userId);
+		//2、删除数据
+		LambdaQueryWrapper<WgzQuestionSavePdf> lqw = Wrappers.lambdaQuery();
+		lqw.eq(WgzQuestionSavePdf::getUserId, userId);
+		int delete = baseMapper.delete(lqw);
+		//3、删除相对路径的pdf文件
+		if(delete > 0){
+			String path = wgzQuestionSavePdf.getPath();
+			StrUtil.removePrefix(path, "upload/");
+			StrUtil.removePrefix(path, "upload\\");
+		}
+		return true;
+	}
 }

ruoyi-system/src/main/java/com/ruoyi/wgz/service/impl/WgzQuestionSaveServiceImpl.java

@@ -227,6 +227,8 @@ public class WgzQuestionSaveServiceImpl extends ServicePlusImpl<WgzQuestionSaveM
 			// 先查询当前用户是否有答题，有就把之前的删除(真删)
 			int deleteResult = baseMapper.delete(new LambdaQueryWrapper<WgzQuestionSave>().eq(WgzQuestionSave::getUserId, req.getUserId()));
 			if (deleteResult >0){
+				// 删除pdf
+				wgzQuestionSavePdfService.deleteByUserId(req.getUserId());
 				// 插入新数据
 				super.saveBatch(bqs);
 			}
@@ -441,7 +443,10 @@ public class WgzQuestionSaveServiceImpl extends ServicePlusImpl<WgzQuestionSaveM
 		res.setCurrentMinute(sumScore);
 		//4、获取pdf试卷信息
 		WgzQuestionSavePdf wgzQuestionSavePdf = wgzQuestionSavePdfService.queryByUserId(userId);
-		return res.setPdfStr(wgzQuestionSavePdf.getPath());
+		if (wgzQuestionSavePdf != null) {
+			res.setPdfStr(wgzQuestionSavePdf.getPath());
+		}
+		return res;
 	}
 
 	@Override