From 7416bf3197f3883d1846cece0b23d0720d400436 Mon Sep 17 00:00:00 2001
From: Vasyl Yovdiy <yovdiyvasyl@gmail.com>
Date: Thu, 16 Jan 2025 11:30:58 +0100
Subject: [PATCH] add support for recursive datatypes

---
 reflex/vars/base.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/reflex/vars/base.py b/reflex/vars/base.py
index 4a75164f4..949a8ecb9 100644
--- a/reflex/vars/base.py
+++ b/reflex/vars/base.py
@@ -30,6 +30,7 @@ from typing import (
     Optional,
     Set,
     Tuple,
+    ForwardRef,
     Type,
     TypeVar,
     Union,
@@ -760,6 +761,12 @@ class Var(Generic[VAR_TYPE]):
 
         fixed_type = get_origin(var_type) or var_type
 
+        if isinstance(fixed_type, ForwardRef):
+            try:
+                fixed_type = fixed_type._evaluate(globals(), locals(), set())
+            except Exception:
+                raise TypeError(f"Could not resolve ForwardRef: {fixed_type}")
+
         if fixed_type in types.UnionTypes:
             inner_types = get_args(var_type)