Jul 18, 2025 · Jul 17, 2025 · Jul 18, 2025
diff --git a/CHANGELOG.md b/CHANGELOG.md

 * Ensured that interpreting `include` query parameter is done in internal Python naming.
  This adds full support for using multipart field names for includes while configuring `JSON_API_FORMAT_FIELD_NAMES`.
 * Ensured that sparse fieldset fully supports `JSON_API_FORMAT_FIELD_NAMES`.

 ### Removed

diff --git a/rest_framework_json_api/serializers.py b/rest_framework_json_api/serializers.py
    get_resource_type_from_instance,
    get_resource_type_from_model,
    get_resource_type_from_serializer,
    undo_format_field_name,
 )


                    sparse_fieldset_query_param
                )
                if sparse_fieldset_value is not None:
                    sparse_fields = sparse_fieldset_value.split(",")
                    sparse_fields = [
                        undo_format_field_name(sparse_field)
                        for sparse_field in sparse_fieldset_value.split(",")
                    ]
                    return (
                        field
                        for field in readable_fields
diff --git a/tests/test_serializers.py b/tests/test_serializers.py
 import pytest
 from django.db import models
 from rest_framework.request import Request
 from rest_framework.utils import model_meta

 from rest_framework_json_api import serializers
        "verified",
        "uuid",
    ]


 def test_readable_fields_with_sparse_fields(client, rf, settings):
    class TestSerializer(serializers.Serializer):
        name = serializers.CharField()
        value = serializers.CharField()
        multi_part_name = serializers.CharField()

        class Meta:
            resource_name = "test"

    settings.JSON_API_FORMAT_FIELD_NAMES = "camelize"
    request = Request(rf.get("/test/", {"fields[test]": "value,multiPartName"}))
    context = {"request": request}
    serializer = TestSerializer(context=context)
    assert [field.field_name for field in serializer._readable_fields] == [
        "value",
        "multi_part_name",
    ]
Original file line number	Diff line number	Diff line change
Expand Up		@@ -19,6 +19,7 @@ any parts of the framework not mentioned in the documentation should generally b

		* Ensured that interpreting `include` query parameter is done in internal Python naming.
		This adds full support for using multipart field names for includes while configuring `JSON_API_FORMAT_FIELD_NAMES`.
		* Ensured that sparse fieldset fully supports `JSON_API_FORMAT_FIELD_NAMES`.

		### Removed

Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -26,6 +26,7 @@
		get_resource_type_from_instance,
		get_resource_type_from_model,
		get_resource_type_from_serializer,
		undo_format_field_name,
		)


Expand DownExpand Up		@@ -89,7 +90,10 @@ def _readable_fields(self):
		sparse_fieldset_query_param
		)
		if sparse_fieldset_value is not None:
		sparse_fields = sparse_fieldset_value.split(",")
		sparse_fields = [
		undo_format_field_name(sparse_field)
		for sparse_field in sparse_fieldset_value.split(",")
		]
		return (
		field
		for field in readable_fields
Expand Down
Original file line number	Diff line number	Diff line change
		@@ -1,5 +1,6 @@
		import pytest
		from django.db import models
		from rest_framework.request import Request
		from rest_framework.utils import model_meta

		from rest_framework_json_api import serializers
Expand DownExpand Up		@@ -84,3 +85,22 @@ class Meta:
		"verified",
		"uuid",
		]


		def test_readable_fields_with_sparse_fields(client, rf, settings):
		class TestSerializer(serializers.Serializer):
		name = serializers.CharField()
		value = serializers.CharField()
		multi_part_name = serializers.CharField()

		class Meta:
		resource_name = "test"

		settings.JSON_API_FORMAT_FIELD_NAMES = "camelize"
		request = Request(rf.get("/test/", {"fields[test]": "value,multiPartName"}))
		context = {"request": request}
		serializer = TestSerializer(context=context)
		assert [field.field_name for field in serializer._readable_fields] == [
		"value",
		"multi_part_name",
		]