Handling read_only/write_only fields on OpenAPI

https://pulp.plan.io/issues/5622
closes #5622

CHANGES/5622.bugfix

@@ -0,0 +1 @@
+Handling `read_only` and `write_only` fields on OpenAPISchema.

pulpcore/app/openapigenerator.py

@@ -373,3 +373,19 @@ def get_tags(self, operation_keys):
             tags = [' '.join(operation_keys[:-1])]
 
         return tags
+
+    def serializer_to_schema(self, serializer):
+        """
+        Convert a serializer to an OpenAPI Schema.
+        Patch: https://github.com/axnsan12/drf-yasg/issues/70#issuecomment-485050813
+        """
+
+        if self.method.lower() == "get":
+            new_fields = OrderedDict()
+            for field_name, field in serializer.fields.items():
+                if not field.write_only:  # Removing write_only fields
+                    new_fields[field_name] = field
+
+            serializer.fields = new_fields
+
+        return super().serializer_to_schema(serializer)

pulpcore/app/serializers/publication.py

@@ -32,7 +32,6 @@ class PublicationSerializer(ModelSerializer):
         label=_('Repository'),
         queryset=models.Repository.objects.all(),
         view_name='repositories-detail',
-        write_only=True
     )
 
     def validate(self, data):