Updated the loading of the layout to support nested containers

pype/hosts/blender/plugin.py

@@ -29,15 +29,19 @@ def get_unique_number(
         c for c in bpy.data.collections
         if c.name == 'AVALON_CONTAINERS'
     ]
-    loaded_assets = []
+    containers = []
+    # First, add the children of avalon containers
     for c in avalon_containers:
-        loaded_assets.extend(c.children)
-    collections_names = [
-        c.name for c in loaded_assets
+        containers.extend(c.children)
+    # then keep looping to include all the children
+    for c in containers:
+        containers.extend(c.children)
+    container_names = [
+        c.name for c in containers
     ]
     count = 1
     name = f"{asset}_{count:0>2}_{subset}_CON"
-    while name in collections_names:
+    while name in container_names:
         count += 1
         name = f"{asset}_{count:0>2}_{subset}_CON"
     return f"{count:0>2}"
@@ -197,16 +201,16 @@ class AssetLoader(api.Loader):
             return None
 
         # Only containerise if it's not already a collection from a .blend file.
-        representation = context["representation"]["name"]
-        if representation != "blend":
-            from avalon.blender.pipeline import containerise
-            return containerise(
-                name=name,
-                namespace=namespace,
-                nodes=nodes,
-                context=context,
-                loader=self.__class__.__name__,
-            )
+        # representation = context["representation"]["name"]
+        # if representation != "blend":
+        #     from avalon.blender.pipeline import containerise
+        #     return containerise(
+        #         name=name,
+        #         namespace=namespace,
+        #         nodes=nodes,
+        #         context=context,
+        #         loader=self.__class__.__name__,
+        #     )
 
         asset = context["asset"]["name"]
         subset = context["subset"]["name"]

pype/plugins/blender/load/load_layout.py

@@ -196,7 +196,7 @@ class BlendLayoutLoader(plugin.AssetLoader):
         assert libpath.is_file(), (
             f"The file doesn't exist: {libpath}"
         )
-        assert extension in pype.hosts.blender.plugin.VALID_EXTENSIONS, (
+        assert extension in plugin.VALID_EXTENSIONS, (
             f"Unsupported file: {libpath}"
         )
 
@@ -350,17 +350,17 @@ class UnrealLayoutLoader(plugin.AssetLoader):
             asset, subset, unique_number
         )
 
-        container = bpy.data.collections.new(lib_container)
-        container.name = container_name
+        layout_container = bpy.data.collections.new(lib_container)
+        layout_container.name = container_name
         blender.pipeline.containerise_existing(
-            container,
+            layout_container,
             name,
             namespace,
             context,
             self.__class__.__name__,
         )
 
-        container_metadata = container.get(
+        container_metadata = layout_container.get(
             blender.pipeline.AVALON_PROPERTY)
 
         container_metadata["libpath"] = libpath
@@ -375,6 +375,9 @@ class UnrealLayoutLoader(plugin.AssetLoader):
 
         all_loaders = api.discover(api.Loader)
 
+        avalon_container = bpy.data.collections.get(
+            blender.pipeline.AVALON_CONTAINERS)
+
         for element in data:
             reference = element.get('reference')
             family = element.get('family')
@@ -396,6 +399,9 @@ class UnrealLayoutLoader(plugin.AssetLoader):
             if not element_container:
                 continue
 
+            avalon_container.children.unlink(element_container)
+            layout_container.children.link(element_container)
+
             element_metadata = element_container.get(
                 blender.pipeline.AVALON_PROPERTY)
 
@@ -426,7 +432,7 @@ class UnrealLayoutLoader(plugin.AssetLoader):
         # Save the list of objects in the metadata container
         container_metadata["objects"] = layout_collection.all_objects
 
-        nodes = [container]
+        nodes = [layout_container]
         self[:] = nodes
         return nodes