From db89056468820b7fa171cc14399c63a1081aaec6 Mon Sep 17 00:00:00 2001
From: Frederick Holland <frederick.holland@connectingnow.com.au>
Date: Thu, 23 Oct 2025 17:02:52 +1100
Subject: [PATCH] Added BeforeSave

---
 models/participant.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/models/participant.go b/models/participant.go
index f4c4439..cca5e5d 100644
--- a/models/participant.go
+++ b/models/participant.go
@@ -2,6 +2,8 @@ package models
 
 import (
 	"time"
+
+	"gorm.io/gorm"
 )
 
 type DBParticipant struct {
@@ -30,3 +32,11 @@ type DBParticipant struct {
 func (DBParticipant) TableName() string {
 	return "gc_participants"
 }
+
+func (p *DBParticipant) BeforeSave(tx *gorm.DB) error {
+	// Convert empty string to nil
+	if p.UserId != nil && *p.UserId == "" {
+		p.UserId = nil
+	}
+	return nil
+}