diff --git a/models/attachment.go b/models/attachment.go
index 7f962234..f691ffd4 100644
--- a/models/attachment.go
+++ b/models/attachment.go
@@ -1,3 +1,4 @@
+//数据库模型.
 package models
 
 import (
diff --git a/models/document_history.go b/models/document_history.go
new file mode 100644
index 00000000..0a0cf4aa
--- /dev/null
+++ b/models/document_history.go
@@ -0,0 +1,5 @@
+package models
+
+type DocumentHistory struct {
+
+}
\ No newline at end of file