tag loader_id from Automodel

src/diffusers/models/auto_model.py

@@ -18,7 +18,7 @@ from typing import Optional, Union
 from huggingface_hub.utils import validate_hf_hub_args
 
 from ..configuration_utils import ConfigMixin
-from ..utils import logging
+from ..utils import logging, DIFFUSERS_LOAD_ID_FIELDS
 from ..utils.dynamic_modules_utils import get_class_from_dynamic_module, resolve_trust_remote_code
 
 
@@ -220,4 +220,11 @@ class AutoModel(ConfigMixin):
             raise ValueError(f"AutoModel can't find a model linked to {orig_class_name}.")
 
         kwargs = {**load_config_kwargs, **kwargs}
-        return model_cls.from_pretrained(pretrained_model_or_path, **kwargs)
+        model = model_cls.from_pretrained(pretrained_model_or_path, **kwargs)
+
+        load_id_kwargs = {"pretrained_model_name_or_path": pretrained_model_or_path, **kwargs}
+        parts = [load_id_kwargs.get(field, "null") for field in DIFFUSERS_LOAD_ID_FIELDS]
+        load_id = "|".join("null" if p is None else p for p in parts)
+        model._diffusers_load_id = load_id
+
+        return model

src/diffusers/modular_pipelines/modular_pipeline_utils.py

@@ -22,7 +22,7 @@ import torch
 
 from ..configuration_utils import ConfigMixin, FrozenDict
 from ..loaders.single_file_utils import _is_single_file_path_or_url
-from ..utils import is_torch_available, logging
+from ..utils import DIFFUSERS_LOAD_ID_FIELDS, is_torch_available, logging
 
 
 if is_torch_available():
@@ -185,7 +185,7 @@ class ComponentSpec:
         """
         Return the names of all loading‐related fields (i.e. those whose field.metadata["loading"] is True).
         """
-        return [f.name for f in fields(cls) if f.metadata.get("loading", False)]
+        return DIFFUSERS_LOAD_ID_FIELDS.copy()
 
     @property
     def load_id(self) -> str:
@@ -197,7 +197,7 @@ class ComponentSpec:
             return "null"
         parts = [getattr(self, k) for k in self.loading_fields()]
         parts = ["null" if p is None else p for p in parts]
-        return "|".join(p for p in parts if p)
+        return "|".join(parts)
 
     @classmethod
     def decode_load_id(cls, load_id: str) -> Dict[str, Optional[str]]:

src/diffusers/utils/__init__.py

@@ -37,6 +37,7 @@ from .constants import (
     USE_PEFT_BACKEND,
     WEIGHTS_INDEX_NAME,
     WEIGHTS_NAME,
+    DIFFUSERS_LOAD_ID_FIELDS,
 )
 from .deprecation_utils import _maybe_remap_transformers_class, deprecate
 from .doc_utils import replace_example_docstring

src/diffusers/utils/constants.py

@@ -73,3 +73,11 @@ DECODE_ENDPOINT_HUNYUAN_VIDEO = "https://o7ywnmrahorts457.us-east-1.aws.endpoint
 ENCODE_ENDPOINT_SD_V1 = "https://qc6479g0aac6qwy9.us-east-1.aws.endpoints.huggingface.cloud/"
 ENCODE_ENDPOINT_SD_XL = "https://xjqqhmyn62rog84g.us-east-1.aws.endpoints.huggingface.cloud/"
 ENCODE_ENDPOINT_FLUX = "https://ptccx55jz97f9zgo.us-east-1.aws.endpoints.huggingface.cloud/"
+
+
+DIFFUSERS_LOAD_ID_FIELDS = [
+    "pretrained_model_name_or_path",
+    "subfolder",
+    "variant",
+    "revision",
+]