From ef54bcf267cd2b122876b749782c9e713a3944f1 Mon Sep 17 00:00:00 2001
From: Corebit <123189979+corebit-nl@users.noreply.github.com>
Date: Mon, 11 Nov 2024 20:57:09 +0000
Subject: [PATCH] Fallback on long callback function names if source cannot be
 found

---
 dash/long_callback/managers/__init__.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/dash/long_callback/managers/__init__.py b/dash/long_callback/managers/__init__.py
index 5bfdc837bc..f7986506c0 100644
--- a/dash/long_callback/managers/__init__.py
+++ b/dash/long_callback/managers/__init__.py
@@ -55,7 +55,11 @@ def get_updated_props(self, key):
         raise NotImplementedError
 
     def build_cache_key(self, fn, args, cache_args_to_ignore):
-        fn_source = inspect.getsource(fn)
+        try:
+            fn_source = inspect.getsource(fn)
+            fn_str = fn_source
+        except OSError:  # pylint: disable=too-broad-exception
+            fn_str = getattr(fn, "__name__", "")
 
         if not isinstance(cache_args_to_ignore, (list, tuple)):
             cache_args_to_ignore = [cache_args_to_ignore]
@@ -68,7 +72,7 @@ def build_cache_key(self, fn, args, cache_args_to_ignore):
                     arg for i, arg in enumerate(args) if i not in cache_args_to_ignore
                 ]
 
-        hash_dict = dict(args=args, fn_source=fn_source)
+        hash_dict = dict(args=args, fn_source=fn_str)
 
         if self.cache_by is not None:
             # Caching enabled