refactor permission system

src/main/java/com/imyeyu/api/modules/common/service/implement/AttachmentServiceImplement.java

@@ -41,6 +41,7 @@ import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 import java.util.Map;
@@ -347,6 +348,8 @@ public class AttachmentServiceImplement extends AbstractEntityService<Attachment
 	@Transactional(TimiServerDBConfig.ROLLBACKER)
 	@Override
 	public void updateByBizId(Attachment.BizType bizType, String bizId, List<Attachment> list) {
+		list = TimiJava.defaultIfNull(list, new ArrayList<>());
+
 		// 数据库现有附件
 		List<Attachment> dbList = mapper.selectAllByBizId(bizType, bizId);
 		Set<String> dbIds = dbList.stream().map(Attachment::getId).collect(Collectors.toSet());