♻️ [#147] Make Betrokkene and OnderwerpObject optional in convenience…

… endpoint

because it should be possible to create e.g.:
- a KlantContact with a Betrokkene but no OnderwerpObject
- a KlantContact with an OnderwerpObject but no Betrokkene

src/openklant/components/klantinteracties/api/serializers/klantcontacten.py

@@ -555,8 +555,8 @@ def __init__(self, *args, **kwargs):
 
 class KlantContactBetrokkeneOnderwerpObjectSerializer(serializers.Serializer):
     klantcontact = KlantcontactSerializer()
-    betrokkene = BetrokkeneConvenienceSerializer()
-    onderwerpobject = OnderwerpobjectConvenienceSerializer()
+    betrokkene = BetrokkeneConvenienceSerializer(required=False)
+    onderwerpobject = OnderwerpobjectConvenienceSerializer(required=False)
 
     @transaction.atomic
     def create(self, validated_data):
@@ -567,22 +567,26 @@ def create(self, validated_data):
         klantcontact_data = validated_data["klantcontact"]
         klantcontact = Klantcontact.objects.create(**klantcontact_data)
 
-        betrokkene_data = validated_data["betrokkene"]
-        betrokkene_data["had_klantcontact"] = {"uuid": str(klantcontact.uuid)}
-        # TODO for some reason `was_partij` is converted to `partij` by the serializer
-        betrokkene_data.setdefault("was_partij", betrokkene_data.get("partij", None))
-        betrokkene_serializer = BetrokkeneSerializer(data=betrokkene_data)
-        betrokkene_serializer.is_valid()
-        betrokkene = betrokkene_serializer.save()
-
-        onderwerpobject_data = validated_data["onderwerpobject"]
-        onderwerpobject_data["klantcontact"] = {"uuid": str(klantcontact.uuid)}
-        onderwerpobject_data.setdefault("was_klantcontact", None)
-        onderwerpobject_serializer = OnderwerpobjectSerializer(
-            data=onderwerpobject_data
-        )
-        onderwerpobject_serializer.is_valid()
-        onderwerpobject = onderwerpobject_serializer.save()
+        betrokkene = None
+        if betrokkene_data := validated_data.pop("betrokkene", None):
+            betrokkene_data["had_klantcontact"] = {"uuid": str(klantcontact.uuid)}
+            # TODO for some reason `was_partij` is converted to `partij` by the serializer
+            betrokkene_data.setdefault(
+                "was_partij", betrokkene_data.get("partij", None)
+            )
+            betrokkene_serializer = BetrokkeneSerializer(data=betrokkene_data)
+            betrokkene_serializer.is_valid()
+            betrokkene = betrokkene_serializer.save()
+
+        onderwerpobject = None
+        if onderwerpobject_data := validated_data.pop("onderwerpobject", None):
+            onderwerpobject_data["klantcontact"] = {"uuid": str(klantcontact.uuid)}
+            onderwerpobject_data.setdefault("was_klantcontact", None)
+            onderwerpobject_serializer = OnderwerpobjectSerializer(
+                data=onderwerpobject_data
+            )
+            onderwerpobject_serializer.is_valid()
+            onderwerpobject = onderwerpobject_serializer.save()
 
         return {
             "klantcontact": klantcontact,

src/openklant/components/klantinteracties/api/tests/test_klantcontacten.py

@@ -1976,3 +1976,54 @@ def test_create_onderwerpobject_with_was_klantcontact(self):
             )
             self.assertEqual(onderwerpobject.klantcontact, klantcontact)
             self.assertEqual(onderwerpobject.was_klantcontact, existing_klantcontact)
+
+    def test_create_without_betrokkene_and_onderwerpobject(self):
+        del self.post_data["betrokkene"]
+        del self.post_data["onderwerpobject"]
+        response = self.client.post(self.url, self.post_data)
+
+        self.assertEqual(response.status_code, status.HTTP_201_CREATED, response.data)
+
+        klantcontact = Klantcontact.objects.get()
+
+        self.assertFalse(Betrokkene.objects.exists())
+        self.assertFalse(Onderwerpobject.objects.exists())
+
+        klantcontact_url = reverse(
+            "klantinteracties:klantcontact-detail",
+            kwargs={"uuid": str(klantcontact.uuid)},
+        )
+
+        klantcontact_url = f"http://testserver{klantcontact_url}"
+
+        data = response.json()
+
+        self.assertEqual(
+            list(data.keys()), ["klantcontact", "betrokkene", "onderwerpobject"]
+        )
+
+        with self.subTest("Klantcontact response data is correct"):
+            expected_klantcontact = {
+                "uuid": str(klantcontact.uuid),
+                "url": klantcontact_url,
+                "gingOverOnderwerpobjecten": [],
+                "hadBetrokkenActoren": [],
+                "hadBetrokkenen": [],
+                "indicatieContactGelukt": False,
+                "inhoud": "changed",
+                "kanaal": "changed",
+                "leiddeTotInterneTaken": [],
+                "nummer": "7948723947",
+                "omvatteBijlagen": [],
+                "onderwerp": "changed",
+                "plaatsgevondenOp": "2020-08-24T14:15:22Z",
+                "taal": "de",
+                "vertrouwelijk": False,
+            }
+            self.assertEqual(data["klantcontact"], expected_klantcontact)
+
+        with self.subTest("Betrokkene is None in response"):
+            self.assertEqual(data["betrokkene"], None)
+
+        with self.subTest("Onderwerpobject is None in response"):
+            self.assertEqual(data["onderwerpobject"], None)

src/openklant/components/klantinteracties/openapi.yaml

@@ -3663,9 +3663,7 @@ components:
         onderwerpobject:
           $ref: '#/components/schemas/OnderwerpobjectConvenience'
       required:
-      - betrokkene
       - klantcontact
-      - onderwerpobject
     Klantcontact:
       type: object
       properties: