From 77eb2a955c2493b03570573b4130437caa9502ec Mon Sep 17 00:00:00 2001
From: Nabil Abdel-Hafeez <7283535+987Nabil@users.noreply.github.com>
Date: Wed, 14 Aug 2024 23:41:29 +0200
Subject: [PATCH] Don't write null for empty option fields of generic records

---
 .../shared/src/main/scala/zio/schema/codec/JsonCodec.scala   | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/zio-schema-json/shared/src/main/scala/zio/schema/codec/JsonCodec.scala b/zio-schema-json/shared/src/main/scala/zio/schema/codec/JsonCodec.scala
index 93e9113ac..8d0997f89 100644
--- a/zio-schema-json/shared/src/main/scala/zio/schema/codec/JsonCodec.scala
+++ b/zio-schema-json/shared/src/main/scala/zio/schema/codec/JsonCodec.scala
@@ -944,8 +944,9 @@ object JsonCodec {
         cfg.ignoreEmptyCollections || schema.optional
 
       val isEmptyCollection = value match {
-        case _: Iterable[_] => value.asInstanceOf[Iterable[_]].isEmpty
-        case _              => false
+        case _: Iterable[_]     => value.asInstanceOf[Iterable[_]].isEmpty
+        case _: IterableOnce[_] => value.asInstanceOf[IterableOnce[_]].iterator.isEmpty
+        case _                  => false
       }
 
       ignoreEmptyCollections && isEmptyCollection