修复表结构同步功能

server/like-generator/src/main/java/com/hxkj/generator/service/impl/GenerateServiceImpl.java

@@ -293,6 +293,8 @@ public class GenerateServiceImpl implements IGenerateService {
                          .eq("table_id", id)
                         .orderByAsc("sort"));
 
+        Assert.isFalse(StringUtil.isEmpty(genTableColumns), "原表数据异常！");
+
         // 原表转Map
         Map<String, GenTableColumn> tableColumnMap = genTableColumns
                 .stream().collect(Collectors.toMap(GenTableColumn::getColumnName, Function.identity()));