!80 修复: 更新import_export.py以过滤空数据表

Merge pull request !80 from xwz1024/develop

backend/dvadmin/utils/import_export.py

@@ -86,4 +86,5 @@ def import_to_data(file_url, field_data, m2m_fields=None):
             else:
                 array[key] = cell_value
         tables.append(array)
-    return tables
+    data = [i for i in tables if len(i) != 0]
+    return data