From f15196a11d4c1461140f37f29aabd64d0fc8852d Mon Sep 17 00:00:00 2001
From: Berg Lucas <55436804+BergLucas@users.noreply.github.com>
Date: Sat, 19 Jul 2025 15:12:37 +0200
Subject: [PATCH] Remove useless if

---
 rest_framework/serializers.py | 37 +++++++++++++++++------------------
 1 file changed, 18 insertions(+), 19 deletions(-)

diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index 7fce43902..86fa5f9cf 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -1106,27 +1106,26 @@ class ModelSerializer(Serializer):
             source_info = info
             source_model = model
 
-            if len(source_attrs) > 1:
-                attr_info = info
-                attr_model = model
+            attr_info = info
+            attr_model = model
 
-                for attr in source_attrs[:-1]:
-                    if attr not in attr_info.relations:
-                        break
+            for attr in source_attrs[:-1]:
+                if attr not in attr_info.relations:
+                    break
 
-                    attr_model = attr_info.relations[attr].related_model
-                    attr_info = model_meta.get_field_info(attr_model)
-                else:
-                    attr = source_attrs[-1]
-                    if (
-                        attr in attr_info.fields_and_pk
-                        or attr in attr_info.relations
-                        or hasattr(attr_model, attr)
-                        or attr == self.url_field_name
-                    ):
-                        source = attr
-                        source_info = attr_info
-                        source_model = attr_model
+                attr_model = attr_info.relations[attr].related_model
+                attr_info = model_meta.get_field_info(attr_model)
+            else:
+                attr = source_attrs[-1]
+                if (
+                    attr in attr_info.fields_and_pk
+                    or attr in attr_info.relations
+                    or hasattr(attr_model, attr)
+                    or attr == self.url_field_name
+                ):
+                    source = attr
+                    source_info = attr_info
+                    source_model = attr_model
 
             # Determine the serializer field class and keyword arguments.
             field_class, field_kwargs = self.build_field(