From 913757c10352502899dbb81f24be6bd3db92f68a Mon Sep 17 00:00:00 2001
From: Jinzhu <wosmvp@gmail.com>
Date: Thu, 7 Nov 2013 13:21:19 +0800
Subject: [PATCH] Ignore those fields don't have valid sql type when auto
 migrate

---
 do.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/do.go b/do.go
index 02c57efc..ae8b4fb2 100644
--- a/do.go
+++ b/do.go
@@ -745,8 +745,8 @@ func (s *Do) autoMigrate() *Do {
 			s.sqlVars = []interface{}{}
 
 			// If column doesn't exist
-			if len(column_name) == 0 {
-				s.sql = fmt.Sprintf("ALTER TABLE %v ADD %v %v", s.tableName(), field.DbName, field.SqlType)
+			if len(column_name) == 0 && len(field.SqlType) > 0 {
+				s.sql = fmt.Sprintf("ALTER TABLE %v ADD %v %v;", s.tableName(), field.DbName, field.SqlType)
 				s.exec()
 			}
 		}