[Bug]: cannot import name 'Undefined' from 'pydantic.fields' (stable-diffusion-webui-forge\venv\lib\site-packages\pydantic\fields.py)

[sunlery]

Checklist

• The issue exists after disabling all extensions
• The issue exists on a clean installation of webui
• The issue is caused by an extension, but I believe it is caused by a bug in the webui
• The issue exists in the current version of the webui
• The issue has not been reported before recently
• The issue has been reported before but has not been fixed yet

What happened?

Python 3.10.11 (tags/v3.10.11:7d4cc5a, Apr 5 2023, 00:38:17) [MSC v.1929 64 bit (AMD64)]
Version: f0.0.17v1.8.0rc-latest-276-g29be1da7
Commit hash: 29be1da
Data\Packages\stable-diffusion-webui-forge\extensions-builtin\forge_legacy_preprocessors\install.py:2: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
import pkg_resources
Data\Packages\stable-diffusion-webui-forge\extensions-builtin\sd_forge_controlnet\install.py:2: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
import pkg_resources
Launching Web UI with arguments: --gradio-allowed-path Data\Images
Total VRAM 6144 MB, total RAM 32620 MB
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 3060 Laptop GPU : native
Hint: your device supports --pin-shared-memory for potential speed improvements.
Hint: your device supports --cuda-malloc for potential speed improvements.
Hint: your device supports --cuda-stream for potential speed improvements.
VAE dtype: torch.bfloat16
CUDA Stream Activated: False

---

launch.py 51
main()

launch.py 47 main
start()

launch_utils.py 541 start
import webui

webui.py 19
initialize.imports()

initialize.py 35 imports
import gradio # noqa: F401

init.py 3
import gradio.components as components

init.py 1
from gradio.components.annotated_image import AnnotatedImage

annotated_image.py 13
from gradio.components.base import IOComponent, _Keywords

base.py 20
from fastapi import UploadFile

init.py 7
from .applications import FastAPI as FastAPI

applications.py 15
from fastapi import routing

routing.py 22
from fastapi import params

params.py 4
from pydantic.fields import FieldInfo, Undefined

ImportError:
cannot import name 'Undefined' from 'pydantic.fields' (Data\Packages\stable-diffusion-webui-forge\venv\lib\site-packages\pydantic\fields.py)

Steps to reproduce the problem

Python 3.10.11 (tags/v3.10.11:7d4cc5a, Apr 5 2023, 00:38:17) [MSC v.1929 64 bit (AMD64)]
Version: f0.0.17v1.8.0rc-latest-276-g29be1da7
Commit hash: 29be1da
Data\Packages\stable-diffusion-webui-forge\extensions-builtin\forge_legacy_preprocessors\install.py:2: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
import pkg_resources
Data\Packages\stable-diffusion-webui-forge\extensions-builtin\sd_forge_controlnet\install.py:2: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
import pkg_resources
Launching Web UI with arguments: --gradio-allowed-path Data\Images
Total VRAM 6144 MB, total RAM 32620 MB
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 3060 Laptop GPU : native
Hint: your device supports --pin-shared-memory for potential speed improvements.
Hint: your device supports --cuda-malloc for potential speed improvements.
Hint: your device supports --cuda-stream for potential speed improvements.
VAE dtype: torch.bfloat16
CUDA Stream Activated: False

---

launch.py 51
main()

launch.py 47 main
start()

launch_utils.py 541 start
import webui

webui.py 19
initialize.imports()

initialize.py 35 imports
import gradio # noqa: F401

init.py 3
import gradio.components as components

init.py 1
from gradio.components.annotated_image import AnnotatedImage

annotated_image.py 13
from gradio.components.base import IOComponent, _Keywords

base.py 20
from fastapi import UploadFile

init.py 7
from .applications import FastAPI as FastAPI

applications.py 15
from fastapi import routing

routing.py 22
from fastapi import params

params.py 4
from pydantic.fields import FieldInfo, Undefined

ImportError:
cannot import name 'Undefined' from 'pydantic.fields' (Data\Packages\stable-diffusion-webui-forge\venv\lib\site-packages\pydantic\fields.py)

What should have happened?

Python 3.10.11 (tags/v3.10.11:7d4cc5a, Apr 5 2023, 00:38:17) [MSC v.1929 64 bit (AMD64)]
Version: f0.0.17v1.8.0rc-latest-276-g29be1da7
Commit hash: 29be1da
Data\Packages\stable-diffusion-webui-forge\extensions-builtin\forge_legacy_preprocessors\install.py:2: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
import pkg_resources
Data\Packages\stable-diffusion-webui-forge\extensions-builtin\sd_forge_controlnet\install.py:2: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
import pkg_resources
Launching Web UI with arguments: --gradio-allowed-path Data\Images
Total VRAM 6144 MB, total RAM 32620 MB
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 3060 Laptop GPU : native
Hint: your device supports --pin-shared-memory for potential speed improvements.
Hint: your device supports --cuda-malloc for potential speed improvements.
Hint: your device supports --cuda-stream for potential speed improvements.
VAE dtype: torch.bfloat16
CUDA Stream Activated: False

---

launch.py 51
main()

launch.py 47 main
start()

launch_utils.py 541 start
import webui

webui.py 19
initialize.imports()

initialize.py 35 imports
import gradio # noqa: F401

init.py 3
import gradio.components as components

init.py 1
from gradio.components.annotated_image import AnnotatedImage

annotated_image.py 13
from gradio.components.base import IOComponent, _Keywords

base.py 20
from fastapi import UploadFile

init.py 7
from .applications import FastAPI as FastAPI

applications.py 15
from fastapi import routing

routing.py 22
from fastapi import params

params.py 4
from pydantic.fields import FieldInfo, Undefined

ImportError:
cannot import name 'Undefined' from 'pydantic.fields' (Data\Packages\stable-diffusion-webui-forge\venv\lib\site-packages\pydantic\fields.py)

What browsers do you use to access the UI ?

No response

Sysinfo

Python 3.10.11 (tags/v3.10.11:7d4cc5a, Apr 5 2023, 00:38:17) [MSC v.1929 64 bit (AMD64)]
Version: f0.0.17v1.8.0rc-latest-276-g29be1da7
Commit hash: 29be1da
Data\Packages\stable-diffusion-webui-forge\extensions-builtin\forge_legacy_preprocessors\install.py:2: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
import pkg_resources
Data\Packages\stable-diffusion-webui-forge\extensions-builtin\sd_forge_controlnet\install.py:2: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
import pkg_resources
Launching Web UI with arguments: --gradio-allowed-path Data\Images
Total VRAM 6144 MB, total RAM 32620 MB
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 3060 Laptop GPU : native
Hint: your device supports --pin-shared-memory for potential speed improvements.
Hint: your device supports --cuda-malloc for potential speed improvements.
Hint: your device supports --cuda-stream for potential speed improvements.
VAE dtype: torch.bfloat16
CUDA Stream Activated: False

---

launch.py 51
main()

launch.py 47 main
start()

launch_utils.py 541 start
import webui

webui.py 19
initialize.imports()

initialize.py 35 imports
import gradio # noqa: F401

init.py 3
import gradio.components as components

init.py 1
from gradio.components.annotated_image import AnnotatedImage

annotated_image.py 13
from gradio.components.base import IOComponent, _Keywords

base.py 20
from fastapi import UploadFile

init.py 7
from .applications import FastAPI as FastAPI

applications.py 15
from fastapi import routing

routing.py 22
from fastapi import params

params.py 4
from pydantic.fields import FieldInfo, Undefined

ImportError:
cannot import name 'Undefined' from 'pydantic.fields' (Data\Packages\stable-diffusion-webui-forge\venv\lib\site-packages\pydantic\fields.py)

Console logs

Python 3.10.11 (tags/v3.10.11:7d4cc5a, Apr  5 2023, 00:38:17) [MSC v.1929 64 bit (AMD64)]
Version: f0.0.17v1.8.0rc-latest-276-g29be1da7
Commit hash: 29be1da7cf2b5dccfc70fbdd33eb35c56a31ffb7
Data\Packages\stable-diffusion-webui-forge\extensions-builtin\forge_legacy_preprocessors\install.py:2: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
  import pkg_resources
Data\Packages\stable-diffusion-webui-forge\extensions-builtin\sd_forge_controlnet\install.py:2: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
  import pkg_resources
Launching Web UI with arguments: --gradio-allowed-path Data\Images
Total VRAM 6144 MB, total RAM 32620 MB
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 3060 Laptop GPU : native
Hint: your device supports --pin-shared-memory for potential speed improvements.
Hint: your device supports --cuda-malloc for potential speed improvements.
Hint: your device supports --cuda-stream for potential speed improvements.
VAE dtype: torch.bfloat16
CUDA Stream Activated:  False

-------------------------------------------------------------------------------
launch.py 51 <module>
main()

launch.py 47 main
start()

launch_utils.py 541 start
import webui

webui.py 19 <module>
initialize.imports()

initialize.py 35 imports
import gradio  # noqa: F401

__init__.py 3 <module>
import gradio.components as components

__init__.py 1 <module>
from gradio.components.annotated_image import AnnotatedImage

annotated_image.py 13 <module>
from gradio.components.base import IOComponent, _Keywords

base.py 20 <module>
from fastapi import UploadFile

__init__.py 7 <module>
from .applications import FastAPI as FastAPI

applications.py 15 <module>
from fastapi import routing

routing.py 22 <module>
from fastapi import params

params.py 4 <module>
from pydantic.fields import FieldInfo, Undefined

ImportError:
cannot import name 'Undefined' from 'pydantic.fields' (Data\Packages\stable-diffusion-webui-forge\venv\lib\site-packages\pydantic\fields.py)

Additional information

No response

[gunser12]

+1

I tried to install using stability matrix in the same way and in the usual way, and everything happened the same way with the same error

Python:3.10.6
RTX 3090 Ti
Driver 552.22

[kamelohr]

+1 Fresh install and got the same error on Win 11 (RTX 2080 Super).

However I managed to get it going with this workaround:

X:\ABSOLUTE_PATH_TO_INSTALLATION_ROOT\venv\Scripts\python.exe -m pip install pydantic@1.10.15

This answer gave me the hint to downgrade pydantic to V1.x and although it threw a dependency warning, it worked afterwards.

 E:\stable-diffusion-webui\venv\Scripts\python.exe -m pip install pydantic==1.10.15
Collecting pydantic==1.10.15
  Using cached pydantic-1.10.15-cp310-cp310-win_amd64.whl (2.1 MB)
Requirement already satisfied: typing-extensions>=4.2.0 in e:\stable-diffusion-webui\venv\lib\site-packages (from pydantic==1.10.15) (4.11.0)
Installing collected packages: pydantic
  Attempting uninstall: pydantic
    Found existing installation: pydantic 2.7.1
    Uninstalling pydantic-2.7.1:
      Successfully uninstalled pydantic-2.7.1
ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
albumentations 1.4.6 requires pydantic>=2.7.0, but you have pydantic 1.10.15 which is incompatible.
Successfully installed pydantic-1.10.15

[mariodian]

This is an issue with fastapi. In my case the setup broke down after installing insightface.

You can fix it by going to the venv/bin, activating the venv by source activate (on linux/mac at least) and updating fastapi to the latest version: pip install fastapi==0.111.0

[Alluseri]

Can confirm the issue is there but @kamelohr's fix worked. Added pydantic==1.10.15 to requirements_versions.txt.

[Vidyut]

+1 same issue. Trying @kamelohr's fix, but doesn't seem to be working. Python 3.10 or 3.11? I have ubuntu 24.04 fresh install, so the system python is 3.12. Using pyenv.

[kamelohr]

@Vidyut You might also try to install fastapi==0.111.0 as @mariodian wrote.
In fact, that's what I tried out as well (reverting to pydantic 2.7.1 and then installing fastapi v0.111.0 with
X:\ABSOLUTE_PATH_TO_INSTALLATION_ROOT\venv\Scripts\python.exe -m pip install fastapi@v0.111.0) and it worked.

I had Python 3.10 working on my system level but don't know what version that pyenv had (I'm at another machine atm).
Hope this helps.

[Vidyut]

Thanks. Amazing. It's working now. Fingers crossed.

[SkyYap]

@kamelohr method doesn't work for me but @mariodian method works for me. I just manually run pip install fastapi==0.111.0 and reopen the webui-user.bat and it works.

[Husky110]

Both possible solutions do not work for me...
By using @kamelohr I can't use InstantID and using @mariodian leaves me with this on startup:

Using xformers cross attention
*** Error loading script: controlnet.py
    Traceback (most recent call last):
      File "/webuis/forge/modules/scripts.py", line 544, in load_scripts
        script_module = script_loading.load_module(scriptfile.path)
      File "/webuis/forge/modules/script_loading.py", line 10, in load_module
        module_spec.loader.exec_module(module)
      File "<frozen importlib._bootstrap_external>", line 883, in exec_module
      File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
      File "/webuis/forge/extensions-builtin/sd_forge_controlnet/scripts/controlnet.py", line 10, in <module>
        from modules.api.api import decode_base64_to_image
      File "/webuis/forge/modules/api/api.py", line 23, in <module>
        from modules.api import models
      File "/webuis/forge/modules/api/models.py", line 113, in <module>
        ).generate_model()
      File "/webuis/forge/modules/api/models.py", line 96, in generate_model
        DynamicModel.__config__.allow_population_by_field_name = True
      File "/venvs/forge/venv/lib/python3.10/site-packages/pydantic/_internal/_model_construction.py", line 242, in __getattr__
        raise AttributeError(item)
    AttributeError: __config__

Some clarification - i'm starting forge via a start-script. Here's the relevant code:

(
  source "$FORGE_VENV_PATH/bin/activate"
  pip install insightface
  pip install pydantic==2.7.1
  pip install fastapi==0.111.0
)
echo -e "\033[0;36mReady to start FORGE-WebUI...\033[0m"
cd /webuis/forge && ./webui.sh