orm string type default will use varchar(255)

@@ -206,8 +206,8 @@ checkType:
 		if err != nil {
 			goto end
 		}
-		if fieldType == TypeTextField && size != "" {
-			fieldType = TypeCharField
+		if fieldType == TypeCharField && tags["type"] == "text" {
+			fieldType = TypeTextField
 		}
 		if fieldType == TypeFloatField && (digits != "" || decimals != "") {
 			fieldType = TypeDecimalField
@@ -312,7 +312,7 @@ checkType:
 				fi.size = int(v)
 			}
 		} else {
-			err = fmt.Errorf("size must be specify")
+			fi.size = 255
 		}
 	case TypeTextField:
 		fi.index = false

@@ -15,7 +15,7 @@ import (
 type Data struct {
 	Id       int
 	Boolean  bool
-	Char     string    `orm:size(50)`
+	Char     string    `orm:"size(50)"`
 	Text     string    `orm:"type(text)"`
 	Date     time.Time `orm:"type(date)"`
 	DateTime time.Time
@@ -100,7 +100,7 @@ type Post struct {
 	Id      int
 	User    *User     `orm:"rel(fk)"`
 	Title   string    `orm:"size(60)"`
-	Content string    ``
+	Content string    `orm:"type(text)"`
 	Created time.Time `orm:"auto_now_add"`
 	Updated time.Time `orm:"auto_now"`
 	Tags    []*Tag    `orm:"rel(m2m)"`
@@ -125,7 +125,7 @@ func NewTag() *Tag {
 type Comment struct {
 	Id      int
 	Post    *Post     `orm:"rel(fk)"`
-	Content string    ``
+	Content string    `orm:"type(text)"`
 	Parent  *Comment  `orm:"null;rel(fk)"`
 	Created time.Time `orm:"auto_now_add"`
 }

@@ -64,7 +64,7 @@ func getFieldType(val reflect.Value) (ft int, err error) {
 	case reflect.Bool:
 		ft = TypeBooleanField
 	case reflect.String:
-		ft = TypeTextField
+		ft = TypeCharField
 	case reflect.Invalid:
 	default:
 		if elm.CanInterface() {