TypeError: LoraInjectedLinear.forward() got an unexpected keyword argument 'scale'

[ethvedbitdesjan]

I got this error while running two different scripts: run_lora_db_unet_only.sh and use_face_conditioning_example.sh

I only made changes regarding my own data and output directory. Also, for the second one I set use_template to "style" but everything else remained the same.

I was running this on kaggle notebooks, so I am not sure whether that is the problem.

Below are the full error descriptions by running use_face_conditioning.sh:

PTI : has 288 lora
PTI : Before training:
Steps:   0%|                                           | 0/1000 [00:00<?, ?it/s]Traceback (most recent call last):
  File "/opt/conda/bin/lora_pti", line 8, in <module>
    sys.exit(main())
  File "/opt/conda/lib/python3.10/site-packages/lora_diffusion/cli_lora_pti.py", line 1040, in main
    fire.Fire(train)
  File "/opt/conda/lib/python3.10/site-packages/fire/core.py", line 141, in Fire
    component_trace = _Fire(component, args, parsed_flag_args, context, name)
  File "/opt/conda/lib/python3.10/site-packages/fire/core.py", line 475, in _Fire
    component, remaining_args = _CallAndUpdateTrace(
  File "/opt/conda/lib/python3.10/site-packages/fire/core.py", line 691, in _CallAndUpdateTrace
    component = fn(*varargs, **kwargs)
  File "/opt/conda/lib/python3.10/site-packages/lora_diffusion/cli_lora_pti.py", line 1012, in train
    perform_tuning(
  File "/opt/conda/lib/python3.10/site-packages/lora_diffusion/cli_lora_pti.py", line 591, in perform_tuning
    loss = loss_step(
  File "/opt/conda/lib/python3.10/site-packages/lora_diffusion/cli_lora_pti.py", line 322, in loss_step
    model_pred = unet(
  File "/opt/conda/lib/python3.10/site-packages/torch/nn/modules/module.py", line 1501, in _call_impl
    return forward_call(*args, **kwargs)
  File "/opt/conda/lib/python3.10/site-packages/diffusers/models/unet_2d_condition.py", line 956, in forward
    sample, res_samples = downsample_block(
  File "/opt/conda/lib/python3.10/site-packages/torch/nn/modules/module.py", line 1501, in _call_impl
    return forward_call(*args, **kwargs)
  File "/opt/conda/lib/python3.10/site-packages/diffusers/models/unet_2d_blocks.py", line 1086, in forward
    hidden_states = attn(
  File "/opt/conda/lib/python3.10/site-packages/torch/nn/modules/module.py", line 1501, in _call_impl
    return forward_call(*args, **kwargs)
  File "/opt/conda/lib/python3.10/site-packages/diffusers/models/transformer_2d.py", line 315, in forward
    hidden_states = block(
  File "/opt/conda/lib/python3.10/site-packages/torch/nn/modules/module.py", line 1501, in _call_impl
    return forward_call(*args, **kwargs)
  File "/opt/conda/lib/python3.10/site-packages/diffusers/models/attention.py", line 197, in forward
    attn_output = self.attn1(
  File "/opt/conda/lib/python3.10/site-packages/torch/nn/modules/module.py", line 1501, in _call_impl
    return forward_call(*args, **kwargs)
  File "/opt/conda/lib/python3.10/site-packages/diffusers/models/attention_processor.py", line 420, in forward
    return self.processor(
  File "/opt/conda/lib/python3.10/site-packages/diffusers/models/attention_processor.py", line 1019, in __call__
    query = attn.to_q(hidden_states, scale=scale)
  File "/opt/conda/lib/python3.10/site-packages/torch/nn/modules/module.py", line 1501, in _call_impl
    return forward_call(*args, **kwargs)
TypeError: LoraInjectedLinear.forward() got an unexpected keyword argument 'scale'

The error is similar to the one I get on running run_lora_db_unet_only.sh

I am not sure how to resolve this. Thank you for your time. I am just a beginner so sorry for the trouble.

[shohog]

Build the environment from source.

[ethvedbitdesjan]

Build the environment from source.

I did run

!pip install git+https://github.com/cloneofsimo/lora.git

Is this not building from source?

[xwhzz]

You may need to lower the version of the Python package, such as using diffusers==0.11.0 and transformers==4.25.1.

[justin-prnd]

query = attn.to_q(hidden_states, scale=scale)

The latest diffusers adopts LoRACompatibleLinear module rather than nn.Linear.

The forward method of LoRACompatibleLinear, however, has an additional kwargs scale which is not included in LoraInjectedLinear.

Since LoraInjectedLinear already has a scale parameter as an instance variable, simply modifying the definition of the forward method of LoraInjectedLinear will resolve the issue.

class LoraInjectedLinear(nn.Module):
  ...
  def forward(self, input, scale: float = 1.0):  # FIXED: add dummy scale argument

[haodong2000]

thanks @justin-prnd

[justin-prnd]

Modification for inference

After training, I faced a similar issue for inference.

The patch_pipe method would fail with the following error.

...
line 784, in monkeypatch_or_replace_lora_extended
    _module._modules[name] = _tmp
UnboundLocalError: local variable '_tmp' referenced before assignment

I figured out that the error occurred because the monkeypatch_or_replace_lora_extended did not handle the LoRACompatibleLinear module properly.

There would be a better solution, but I fixed the issue by simply adding the LoRACompatibleLinear module on the search target.

def monkeypatch_or_replace_lora_extended(
    model,
    loras,
    target_replace_module=DEFAULT_TARGET_REPLACE,
    r: Union[int, List[int]] = 4,
):
    for _module, name, _child_module in _find_modules(
        model,
        target_replace_module,
        search_class=[nn.Linear, LoraInjectedLinear, LoRACompatibleLinear, nn.Conv2d, LoraInjectedConv2d],
    ):
        _tmp = None

        if _child_module.__class__ in {nn.Linear, LoraInjectedLinear, LoRACompatibleLinear}:
           ...

[ethvedbitdesjan]

@justin-prnd where is the LoRACompatibleLinear defined? I get module not defined error?

[justin-prnd]

@justin-prnd where is the LoRACompatibleLinear defined? I get module not defined error?

Defined at
https://github.com/huggingface/diffusers/blob/main/src/diffusers/models/lora.py#L181
and can be imported as

from diffusers.models.lora import LoRACompatibleLinear

if diffusers >= v0.16.0