scripts-blender/addons/asset_pipeline_2/merge/drivers.py

@@ -51,7 +51,7 @@ def copy_driver(
 
 
 def find_drivers(
-    drivers: list[bpy.types.FCurve], target_type: str, target_name: str
+    id: bpy.types.ID, target_type: str, target_name: str
 ) -> list[bpy.types.FCurve]:
     """_summary_
 
@@ -64,6 +64,9 @@ def find_drivers(
         list[bpy.types.FCurve]: List of FCurves containing drivers that match type & name
     """
     found_drivers = []
+    if id.animation_data is None or id.animation_data.drivers is None:
+        return found_drivers
+    drivers = id.animation_data.drivers
     for driver in drivers:
         if f'{target_type}["{target_name}"]' in driver.data_path:
             found_drivers.append(driver)

scripts-blender/addons/asset_pipeline_2/merge/transfer_data/transfer_functions.py

@@ -259,9 +259,7 @@ def transfer_modifier(modifier_name, target_obj, source_obj):
                 )
         if source_obj.animation_data is None:
             return
-        fcurves = find_drivers(
-            source_obj.animation_data.drivers, 'modifiers', modifier_name
-        )
+        fcurves = find_drivers(source_obj, 'modifiers', modifier_name)
         for fcurve in fcurves:
             copy_driver(from_fcurve=fcurve, target=target_obj)
 
@@ -332,9 +330,7 @@ def transfer_constraint(constraint_name, target_obj, source_obj):
 
     if source_obj.animation_data is None:
         return
-    fcurves = find_drivers(
-        source_obj.animation_data.drivers, 'constraints', constraint_name
-    )
+    fcurves = find_drivers(source_obj, 'constraints', constraint_name)
 
     for fcurve in fcurves:
         copy_driver(from_fcurve=fcurve, target=target_obj)
@@ -573,7 +569,7 @@ def transfer_shape_key(
         val = mathutils.Vector(sum(np.array(vals_weighted)))
         sk_target.data[i].co = vert.co + val
     fcurves = find_drivers(
-        source_obj.data.shape_keys.animation_data.drivers,
+        source_obj.data.shape_keys,
         'key_blocks',
         shape_key_name,
     )