Fix #1600: Filter out containers that lack required keys (looking at you ayon-unreal!)

client/ayon_core/plugins/publish/collect_scene_loaded_versions.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+from typing import Any
 import ayon_api
 import ayon_api.utils
 
@@ -32,6 +34,8 @@ class CollectSceneLoadedVersions(pyblish.api.ContextPlugin):
             self.log.debug("No loaded containers found in scene.")
             return
 
+        containers = self._filter_invalid_containers(containers)
+
         repre_ids = {
             container["representation"]
             for container in containers
@@ -78,3 +82,29 @@ class CollectSceneLoadedVersions(pyblish.api.ContextPlugin):
 
         self.log.debug(f"Collected {len(loaded_versions)} loaded versions.")
         context.data["loadedVersions"] = loaded_versions
+
+    def _filter_invalid_containers(
+        self,
+        containers: list[dict[str, Any]]
+    ) -> list[dict[str, Any]]:
+        """Filter out invalid containers lacking required keys.
+
+        Skip any invalid containers that lack 'representation' or 'name'
+        keys to avoid KeyError.
+        """
+        # Only filter by what's required for this plug-in instead of validating
+        # a full container schema.
+        required_keys = {"name", "representation"}
+        valid = []
+        for container in containers:
+            missing = [key for key in required_keys if key not in container]
+            if missing:
+                self.log.debug(
+                    "Skipping invalid container, missing required keys:"
+                    " {}. {}".format(", ".join(missing), container)
+                )
+                continue
+            valid.append(container)
+
+
+        return valid