From 0ec6254be07c7bb14dcc173843797f32d60c164b Mon Sep 17 00:00:00 2001
From: Lisa Scheers <lisa@scheers.tech>
Date: Wed, 27 May 2026 18:37:40 +0200
Subject: [PATCH] python3Packages.drf-flex-fields: fix build with
 djangorestframework 3.17

Backport the import fallback submitted upstream in rsinger86/drf-flex-fields#146.

Assisted-by: OpenAI Codex (GPT-5)
---
 .../drf-flex-fields/default.nix               |  5 +++-
 .../drf-flex-fields/drf-3.17-compat.patch     | 23 +++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100644 pkgs/development/python-modules/drf-flex-fields/drf-3.17-compat.patch

diff --git a/pkgs/development/python-modules/drf-flex-fields/default.nix b/pkgs/development/python-modules/drf-flex-fields/default.nix
index 5309cd811908..51788ad9ea87 100644
--- a/pkgs/development/python-modules/drf-flex-fields/default.nix
+++ b/pkgs/development/python-modules/drf-flex-fields/default.nix
@@ -39,7 +39,10 @@ buildPythonPackage rec {
     hash = "sha256-+9ToxCEIDpsA+BK8Uk0VueVjoId41/S93+a716EGvCU=";
   };
 
-  patches = [ ./django4-compat.patch ];
+  patches = [
+    ./django4-compat.patch
+    ./drf-3.17-compat.patch
+  ];
 
   build-system = [ setuptools ];
 
diff --git a/pkgs/development/python-modules/drf-flex-fields/drf-3.17-compat.patch b/pkgs/development/python-modules/drf-flex-fields/drf-3.17-compat.patch
new file mode 100644
index 000000000000..789f5bbb08a0
--- /dev/null
+++ b/pkgs/development/python-modules/drf-flex-fields/drf-3.17-compat.patch
@@ -0,0 +1,23 @@
+Upstream-Status: Submitted [https://github.com/rsinger86/drf-flex-fields/pull/146]
+
+diff --git a/rest_flex_fields/filter_backends.py b/rest_flex_fields/filter_backends.py
+index 5eba44d..1f6461c 100644
+--- a/rest_flex_fields/filter_backends.py
++++ b/rest_flex_fields/filter_backends.py
+@@ -4,7 +4,16 @@ from django.core.exceptions import FieldDoesNotExist
+ from django.db import models
+ from django.db.models import QuerySet
+-from rest_framework.compat import coreapi, coreschema
++try:
++    from rest_framework.compat import coreapi, coreschema
++except ImportError:
++    try:
++        import coreapi
++        import coreschema
++    except ImportError:
++        coreapi = None
++        coreschema = None
++
+ from rest_framework.filters import BaseFilterBackend
+ from rest_framework.request import Request
+ from rest_framework.viewsets import GenericViewSet