handle zero as valid pk/id in get_resource_id util method

- update tests to include cases where ID is zero

Author: humayunah

AUTHORS

@@ -52,3 +52,4 @@ Tim Selman <timcbaoth@gmail.com>
 Tom Glowka <glowka.tom@gmail.com>
 Ulrich Schuster <ulrich.schuster@mailworks.org>
 Yaniv Peer <yanivpeer@gmail.com>
+Humayun Ahmad <humayunahbh@gmail.com>

CHANGELOG.md

@@ -14,6 +14,7 @@ any parts of the framework not mentioned in the documentation should generally b
 
 * Allow overwriting of url field again (regression since 7.0.0)
 * Ensured that no fields are rendered when sparse fields is set to an empty value. (regression since 7.0.0)
+* Handled zero as a valid ID in `get_resource_id` function.
 
 ## [7.0.1] - 2024-06-06
 

rest_framework_json_api/utils.py

@@ -307,12 +307,14 @@ def get_resource_type_from_serializer(serializer):
 def get_resource_id(resource_instance, resource):
     """Returns the resource identifier for a given instance (`id` takes priority over `pk`)."""
     if resource and "id" in resource:
-        return resource["id"] and encoding.force_str(resource["id"]) or None
+        return (
+            encoding.force_str(resource["id"]) if resource["id"] is not None else None
+        )
     if resource_instance:
         return (
-            hasattr(resource_instance, "pk")
-            and encoding.force_str(resource_instance.pk)
-            or None
+            encoding.force_str(resource_instance.pk)
+            if hasattr(resource_instance, "pk") and resource_instance.pk is not None
+            else None
         )
     return None
 

tests/test_utils.py

@@ -403,6 +403,13 @@ class SerializerWithoutResourceName(serializers.Serializer):
         (None, {"id": 11}, "11"),
         (object(), {"pk": 11}, None),
         (BasicModel(id=6), {"id": 11}, "11"),
+        (BasicModel(id=0), None, "0"),
+        (None, {"id": 0}, "0"),
+        (
+            BasicModel(id=0),
+            {"id": 0},
+            "0",
+        ),
     ],
 )
 def test_get_resource_id(resource_instance, resource, expected):