Fix openapi schema for created resources

Actually, instead of fixing the schema, we make sure the field always
returns a string to comply with its definition.

This workaround is necessary to be able to consume both new and old
bindings generators.

Author: mdellweg

CHANGES/+created_resource_schema.bugfix

@@ -0,0 +1 @@
+Fixed the schema definition for created resources.

pulpcore/app/serializers/base.py

@@ -208,7 +208,7 @@ def to_representation(self, data):
                 if repo_ver_mapping is not None:
                     if repo_ver := repo_ver_mapping.get(data.object_id):
                         return self.repo_ver_url(repo_ver, request=request)
-                    return None
+                    return "<unavailabe>"
             else:
                 try:
                     view_name = get_view_name_for_model(model, "detail")
@@ -229,10 +229,10 @@ def to_representation(self, data):
         # Fallback onto normal lookup:
         # If the content object was deleted
         if data.content_object is None:
-            return None
+            return "<unavailabe>"
         try:
             if not data.content_object.complete:
-                return None
+                return "<unavailable>"
         except AttributeError:
             pass
 

pulpcore/app/serializers/task.py

@@ -17,7 +17,7 @@
 from pulpcore.app.util import reverse
 
 
-class CreatedResourceSerializer(RelatedResourceField):
+class CreatedResourceField(RelatedResourceField):
     class Meta:
         model = models.CreatedResource
         fields = []
@@ -78,7 +78,7 @@ class TaskSerializer(ModelSerializer):
         view_name="task-groups-detail",
     )
     progress_reports = ProgressReportSerializer(many=True, read_only=True)
-    created_resources = CreatedResourceSerializer(
+    created_resources = CreatedResourceField(
         help_text=_("Resources created by this task."),
         many=True,
         read_only=True,