loop_lora_selector.py

import os
from folder_paths import get_filename_list, get_full_path
import comfy.sd
import comfy.utils

class LoopLoraSelector:
    @classmethod
    def INPUT_TYPES(cls):
        lora_list = get_filename_list("loras")
        optional_inputs = {}
        
        # Add a default value if lora_list is empty
        if not lora_list:
            lora_list = ["none"]
            
        for i in range(1, 21):
            optional_inputs[f"lora_{i}"] = (lora_list, {"default": lora_list[0]})
            optional_inputs[f"strength_model_{i}"] = ("FLOAT", {"default": 1.0, "min": -100.0, "max": 100.0, "step": 0.01})
            optional_inputs[f"strength_clip_{i}"] = ("FLOAT", {"default": 1.0, "min": -100.0, "max": 100.0, "step": 0.01})

        return {
            "required": {
                "number_of_loras": ("INT", {"default": 3, "min": 1, "max": 20, "step": 1}),
                "model": ("MODEL",),
                "clip": ("CLIP",),
            },
            "optional": optional_inputs
        }

    RETURN_TYPES = ("MODEL", "CLIP", "STRING", "STRING", "STRING")
    RETURN_NAMES = ("model", "clip", "lora_path", "lora_name", "lora_folder")
    FUNCTION = "loop_select_lora"
    CATEGORY = "Bjornulf"
    OUTPUT_IS_LIST = (True, True, True, True, True)

    def loop_select_lora(self, number_of_loras, model, clip, **kwargs):
        available_loras = []
        strengths_model = []
        strengths_clip = []

        for i in range(1, number_of_loras + 1):
            lora_key = f"lora_{i}"
            strength_model_key = f"strength_model_{i}"
            strength_clip_key = f"strength_clip_{i}"

            if lora_key in kwargs and kwargs[lora_key] and kwargs[lora_key] != "none":
                available_loras.append(kwargs[lora_key])
                strengths_model.append(kwargs.get(strength_model_key, 1.0))
                strengths_clip.append(kwargs.get(strength_clip_key, 1.0))
        
        if not available_loras:
            # Return original model and clip if no valid LoRAs are selected
            return ([model], [clip], [""], [""], [""])
        
        models = []
        clips = []
        lora_paths = []
        lora_names = []
        lora_folders = []
        
        for selected_lora, strength_model, strength_clip in zip(available_loras, strengths_model, strengths_clip):
            lora_name = os.path.splitext(os.path.basename(selected_lora))[0]
            lora_path = get_full_path("loras", selected_lora)
            lora_folder = os.path.basename(os.path.dirname(lora_path))
            
            lora = comfy.utils.load_torch_file(lora_path, safe_load=True)
            
            model_lora, clip_lora = comfy.sd.load_lora_for_models(model, clip, lora, strength_model, strength_clip)
            
            models.append(model_lora)
            clips.append(clip_lora)
            lora_paths.append(lora_path)
            lora_names.append(lora_name)
            lora_folders.append(lora_folder)
        
        return (models, clips, lora_paths, lora_names, lora_folders)