diff --git a/backend/app/models/posts.go b/backend/app/models/posts.go
index c3d3d0b..3c32e27 100644
--- a/backend/app/models/posts.go
+++ b/backend/app/models/posts.go
@@ -228,8 +228,11 @@ func (m *postsModel) SendTo(ctx context.Context, postId, userId int64) error {
 	// add record to user_posts
 	tbl := table.UserPosts
 	stmt := tbl.INSERT(tbl.MutableColumns).MODEL(model.UserPosts{
-		UserID: userId,
-		PostID: postId,
+		CreatedAt: time.Now(),
+		UpdatedAt: time.Now(),
+		UserID:    userId,
+		PostID:    postId,
+		Price:     -1,
 	})
 	m.log.Infof("sql: %s", stmt.DebugSql())
 	if _, err := stmt.ExecContext(ctx, db); err != nil {