is_safetensors_compatible fix (#9741)

update

src/diffusers/pipelines/pipeline_loading_utils.py

@@ -118,6 +118,10 @@ def is_safetensors_compatible(filenames, passed_components=None, folder_names=No
         components.setdefault(component, [])
         components[component].append(component_filename)
 
+    # If there are no component folders check the main directory for safetensors files
+    if not components:
+        return any(".safetensors" in filename for filename in filenames)
+
     # iterate over all files of a component
     # check if safetensor files exist for that component
     # if variant is provided check if the variant of the safetensors exists

tests/pipelines/test_pipeline_utils.py

@@ -197,6 +197,18 @@ def test_diffusers_is_compatible_only_variants(self):
         ]
         self.assertTrue(is_safetensors_compatible(filenames))
 
+    def test_diffusers_is_compatible_no_components(self):
+        filenames = [
+            "diffusion_pytorch_model.bin",
+        ]
+        self.assertFalse(is_safetensors_compatible(filenames))
+
+    def test_diffusers_is_compatible_no_components_only_variants(self):
+        filenames = [
+            "diffusion_pytorch_model.fp16.bin",
+        ]
+        self.assertFalse(is_safetensors_compatible(filenames))
+
 
 class ProgressBarTests(unittest.TestCase):
     def get_dummy_components_image_generation(self):