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Move helper to attach several LoRAs from SD to Fluxion
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@ -435,3 +435,32 @@ class LoraAdapter(fl.Sum, Adapter[fl.WeightedModule]):
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lora = self.loras[name]
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self.remove(lora)
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return lora
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def auto_attach_loras(
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loras: dict[str, Lora[Any]],
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target: fl.Chain,
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/,
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exclude: list[str] | None = None,
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) -> list[str]:
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"""Auto-attach several LoRA layers to a Chain.
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Args:
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loras: A dictionary of LoRA layers associated to their respective key.
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target: The target Chain.
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Returns:
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A list of keys of LoRA layers which failed to attach.
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"""
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failed_keys: list[str] = []
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for key, lora in loras.items():
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if attached := lora.auto_attach(target, exclude=exclude):
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adapter, parent = attached
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if parent is None:
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# `adapter` is already attached and `lora` has been added to it
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continue
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adapter.inject(parent)
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else:
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failed_keys.append(key)
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return failed_keys
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@ -4,7 +4,7 @@ from warnings import warn
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from torch import Tensor
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import refiners.fluxion.layers as fl
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from refiners.fluxion.adapters.lora import Lora, LoraAdapter
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from refiners.fluxion.adapters.lora import Lora, LoraAdapter, auto_attach_loras
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from refiners.foundationals.latent_diffusion.model import LatentDiffusionModel
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@ -115,7 +115,9 @@ class SDLoraManager:
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(keys are the names of the LoRAs, values are the LoRAs to add to the text encoder)
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"""
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text_encoder_loras = {key: loras[key] for key in loras.keys() if "text" in key}
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SDLoraManager.auto_attach(text_encoder_loras, self.clip_text_encoder)
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failed = auto_attach_loras(text_encoder_loras, self.clip_text_encoder)
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if failed:
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warn(f"failed to attach {len(failed)}/{len(text_encoder_loras)} loras to the text encoder")
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def add_loras_to_unet(self, loras: dict[str, Lora[Any]], /) -> None:
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"""Add multiple LoRAs to the U-Net.
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@ -128,7 +130,9 @@ class SDLoraManager:
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exclude = [
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block for s, block in self.unet_exclusions.items() if all([s not in key for key in unet_loras.keys()])
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]
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SDLoraManager.auto_attach(unet_loras, self.unet, exclude=exclude)
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failed = auto_attach_loras(unet_loras, self.unet, exclude=exclude)
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if failed:
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warn(f"failed to attach {len(failed)}/{len(unet_loras)} loras to the unet")
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def remove_loras(self, *names: str) -> None:
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"""Remove multiple LoRAs from the target.
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@ -273,25 +277,3 @@ class SDLoraManager:
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padded_key_prefix = SDLoraManager._pad(key.removesuffix(sfx))
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return (padded_key_prefix, score)
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@staticmethod
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def auto_attach(
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loras: dict[str, Lora[Any]],
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target: fl.Chain,
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/,
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exclude: list[str] | None = None,
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) -> None:
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failed_loras: dict[str, Lora[Any]] = {}
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for key, lora in loras.items():
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if attach := lora.auto_attach(target, exclude=exclude):
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adapter, parent = attach
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# if parent is None, `adapter` is already attached and `lora` has been added to it
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if parent is not None:
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adapter.inject(parent)
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else:
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failed_loras[key] = lora
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if failed_loras:
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warn(f"failed to attach {len(failed_loras)}/{len(loras)} loras to {target.__class__.__name__}")
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# TODO: add a stronger sanity check to make sure loras are attached correctly
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