Fix LoRA loading with PEFT backend and adapter names

- Add peft and requests to requirements.txt
- Use adapter names for loading multiple LoRAs
- Use pipe.set_adapters() to activate all LoRAs simultaneously
- Proper error handling for each LoRA load

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app.py

@@ -45,6 +45,7 @@ def preload_and_load_all_loras():
     global loaded_loras
     
     print("Downloading and loading all LoRAs...")
+    adapters_to_load = []
     
     for lora_name, lora_path in LORAS.items():
         if lora_name == "None" or lora_path is None:
@@ -56,21 +57,25 @@ def preload_and_load_all_loras():
             lora_path = download_lora_from_url(lora_path, filename)
         
         loaded_loras[lora_name] = lora_path
+        adapters_to_load.append(lora_path)
         print(f"Downloaded {lora_name}")
-        
-        # Load each LoRA individually
+    
+    # Load all LoRAs with different adapter names
+    for i, lora_path in enumerate(adapters_to_load):
         try:
-            pipe.load_lora_weights(lora_path)
-            print(f"Loaded {lora_name}")
+            adapter_name = f"adapter_{i}"
+            pipe.load_lora_weights(lora_path, adapter_name=adapter_name)
+            print(f"Loaded adapter {adapter_name}")
         except Exception as e:
-            print(f"Failed to load {lora_name}: {e}")
+            print(f"Failed to load {lora_path}: {e}")
     
-    # Fuse all loaded LoRAs
+    # Set all adapters as active
     try:
-        pipe.fuse_lora(lora_scale=1.0)
-        print(f"All LoRAs fused and active!")
+        adapter_names = [f"adapter_{i}" for i in range(len(adapters_to_load))]
+        pipe.set_adapters(adapter_names)
+        print(f"All {len(adapters_to_load)} LoRAs active!")
     except Exception as e:
-        print(f"Failed to fuse LoRAs: {e}")
+        print(f"Failed to activate adapters: {e}")
 
 # Load all LoRAs at startup
 preload_and_load_all_loras()

requirements.txt

@@ -3,4 +3,6 @@ git+https://github.com/huggingface/diffusers.git
 torch
 transformers==4.42.4
 xformers
-sentencepiece
+sentencepiece
+peft
+requests