Add read-only viewset for RustPackageYank

pulp_rust/app/serializers.py

@@ -192,6 +192,24 @@ class Meta:
         model = models.RustContent
 
 
+class RustPackageYankSerializer(core_serializers.NoArtifactContentSerializer):
+    """
+    Read-only serializer for RustPackageYank marker content type.
+
+    Used by RustPackageYankViewSet to expose yank markers via the Pulp REST API.
+    """
+
+    name = serializers.CharField(read_only=True)
+    vers = serializers.CharField(read_only=True)
+
+    class Meta:
+        fields = core_serializers.NoArtifactContentSerializer.Meta.fields + (
+            "name",
+            "vers",
+        )
+        model = models.RustPackageYank
+
+
 class RustRemoteSerializer(core_serializers.RemoteSerializer):
     """
     A Serializer for RustRemote.

pulp_rust/app/viewsets.py

@@ -75,6 +75,30 @@ class RustContentViewSet(core.ReadOnlyContentViewSet):
     }
 
 
+class RustPackageYankViewSet(core.ReadOnlyContentViewSet):
+    """
+    Read-only viewset for RustPackageYank marker content type.
+    RustPackageYank markers indicate that a crate version has been yanked in a repository.
+    Use the Cargo DELETE api/v1/crates/{name}/{version}/yank and
+    PUT api/v1/crates/{name}/{version}/unyank endpoints to create or remove these markers.
+    """
+
+    endpoint_name = "yanks"
+    queryset = models.RustPackageYank.objects.all()
+    serializer_class = serializers.RustPackageYankSerializer
+
+    DEFAULT_ACCESS_POLICY = {
+        "statements": [
+            {
+                "action": ["list", "retrieve"],
+                "principal": "authenticated",
+                "effect": "allow",
+            },
+        ],
+        "queryset_scoping": {"function": "scope_queryset"},
+    }
+
+
 class RustRemoteFilter(RemoteFilter):
     """
     A FilterSet for RustRemote.