Readd NOT NULL to new preference string

Signed-off-by: Gary Kim <gary@garykim.dev>

Author: gary-kim

models/migrations/v93.go

@@ -9,7 +9,7 @@ import "github.com/go-xorm/xorm"
 func addEmailNotificationEnabledToUser(x *xorm.Engine) error {
 	// Issue see models/user.go
 	type User struct {
-		EmailNotificationsPreference string `xorm:"DEFAULT 'enabled'"`
+		EmailNotificationsPreference string `xorm:"NOT NULL DEFAULT 'enabled'"`
 	}
 
 	return x.Sync2(new(User))

models/user.go

@@ -96,7 +96,7 @@ type User struct {
 	// Email is the primary email address (to be used for communication)
 	Email                        string `xorm:"NOT NULL"`
 	KeepEmailPrivate             bool
-	EmailNotificationsPreference string `xorm:"DEFAULT 'enabled'"`
+	EmailNotificationsPreference string `xorm:"NOT NULL DEFAULT 'enabled'"`
 	Passwd                       string `xorm:"NOT NULL"`
 	PasswdHashAlgo               string `xorm:"NOT NULL DEFAULT 'pbkdf2'"`