From 3f3f98d196316577365127d78eae90b426f03eaf Mon Sep 17 00:00:00 2001
From: Pedro Lobato <69770518+Lob26@users.noreply.github.com>
Date: Tue, 10 Feb 2026 13:20:11 -0500
Subject: [PATCH] More tests for coverage

---
 fastapi/encoders.py            | 11 +++++------
 tests/test_jsonable_encoder.py | 27 +++++++++++++++++++++++++--
 2 files changed, 30 insertions(+), 8 deletions(-)

diff --git a/fastapi/encoders.py b/fastapi/encoders.py
index 66ab01b14..f9e309e31 100644
--- a/fastapi/encoders.py
+++ b/fastapi/encoders.py
@@ -38,10 +38,7 @@ try:
     from pydantic_extra_types import coordinate
 
     encoders_by_extra_type: dict[type[Any], Callable[[Any], Any]] = {
-        coordinate.Coordinate: lambda o: {
-            "latitude": o.latitude,
-            "longitude": o.longitude,
-        },
+        coordinate.Coordinate: str,
         et_color.Color: str,
     }
 except ImportError:
@@ -273,6 +270,10 @@ def jsonable_encoder(
             exclude_defaults=exclude_defaults,
             sqlalchemy_safe=sqlalchemy_safe,
         )
+    # The extra types have their own encoders, so we check for them before checking for dataclasses,
+    # because some of them are also dataclasses, and we want to use their custom encoders instead of encoding them as dataclasses.
+    if type(obj) in encoders_by_extra_type:
+        return encoders_by_extra_type[type(obj)](obj)
     if dataclasses.is_dataclass(obj):
         assert not isinstance(obj, type)
         obj_dict = dataclasses.asdict(obj)
@@ -369,8 +370,6 @@ def jsonable_encoder(
             )
         return encoded_list
 
-    if type(obj) in encoders_by_extra_type:
-        return encoders_by_extra_type[type(obj)](obj)
     if type(obj) in ENCODERS_BY_TYPE:
         return ENCODERS_BY_TYPE[type(obj)](obj)
     for encoder, classes_tuple in encoders_by_class_tuples.items():
diff --git a/tests/test_jsonable_encoder.py b/tests/test_jsonable_encoder.py
index 564b5d81d..5b65758c4 100644
--- a/tests/test_jsonable_encoder.py
+++ b/tests/test_jsonable_encoder.py
@@ -1,3 +1,4 @@
+import sys
 import warnings
 from collections import deque, namedtuple
 from collections.abc import Sequence
@@ -423,5 +424,27 @@ def test_encode_sqlalchemy_row_as_dict():
 def test_encode_pydantic_extra_types_coordinate():
     coordinate = pytest.importorskip("pydantic_extra_types.coordinate")
     coord = coordinate.Coordinate(latitude=1.0, longitude=2.0)
-    assert jsonable_encoder(coord) != str(coord)
-    assert jsonable_encoder(coord) == {"latitude": 1.0, "longitude": 2.0}
+    # Dataclass output shouldn't be the result
+    assert jsonable_encoder(coord) != {"latitude": 1.0, "longitude": 2.0}
+    # The custom encoder should be the result
+    assert jsonable_encoder(coord) == str(coord)
+
+
+@pytest.mark.skipif(
+    sys.version_info > (3, 9),
+    reason="Tested via pydantic_extra_types on Python > 3.9",
+)
+def test_encode_pydantic_color():
+    pydantic_color = pytest.importorskip("pydantic.color")
+    color = pydantic_color.Color("red")
+    assert jsonable_encoder(color) == str(color)
+
+
+@pytest.mark.skipif(
+    sys.version_info <= (3, 9),
+    reason="pydantic_extra_types.color not available on Python <= 3.9",
+)
+def test_encode_pydantic_extra_types_color():
+    et_color = pytest.importorskip("pydantic_extra_types.color")
+    color = et_color.Color("red")
+    assert jsonable_encoder(color) == str(color)