further removal of Paths

invokeai/app/api/routers/models.py

@@ -267,12 +267,11 @@ async def convert_model(
     logger = ApiDependencies.invoker.services.logger
     try:
         logger.info(f"Converting model: {model_name}")
-        dest = pathlib.Path(convert_dest_directory) if convert_dest_directory else None
         ApiDependencies.invoker.services.model_manager.convert_model(
             model_name,
             base_model=base_model,
             model_type=model_type,
-            convert_dest_directory=dest,
+            convert_dest_directory=convert_dest_directory,
         )
         model_raw = ApiDependencies.invoker.services.model_manager.list_model(
             model_name, base_model=base_model, model_type=model_type

invokeai/app/services/model_manager_service.py

@@ -577,7 +577,7 @@ class ModelManagerService(ModelManagerServiceBase):
         alpha: float = 0.5,
         interp: Optional[MergeInterpolationMethod] = None,
         force: bool = False,
-        merge_dest_directory: Optional[Path] = Field(
+        merge_dest_directory: Optional[str] = Field(
             default=None, description="Optional directory location for merged model"
         ),
     ) -> AddModelResult:

invokeai/backend/model_management/model_merge.py

@@ -31,7 +31,7 @@ class ModelMerger(object):
 
     def merge_diffusion_models(
         self,
-        model_paths: List[Path],
+        model_paths: List[str],
         alpha: float = 0.5,
         interp: Optional[MergeInterpolationMethod] = None,
         force: bool = False,
@@ -75,7 +75,7 @@ class ModelMerger(object):
         alpha: float = 0.5,
         interp: Optional[MergeInterpolationMethod] = None,
         force: bool = False,
-        merge_dest_directory: Optional[Path] = None,
+        merge_dest_directory: Optional[str] = None,
         **kwargs,
     ) -> AddModelResult:
         """