Incompatible with pydantic v2

[Niivii]

pydantic.error_wrappers:ErrorWrapper has been removed in V2

[romis2012]

Yes, pydantic-collections is compatible with pydantic>=1.8.2,<2.0. We just forgot to pin the pydantic version (

[romis2012]

Pydantic v2 support added in version 0.5.0

[matthewelwell]

Hi @romis2012, it seems like there are compatibility issues with pydantic==2.2.1? Perhaps this is a pydantic issue rather than a pydantic-collection issue so please forgive me if so but, given the relevance of this issue, I figured I would raise it here first.

The following code works with pydantic==2.1.1 but not 2.2.1.

from pydantic import BaseModel
from pydantic_collections import BaseCollectionModel


class MyModel(BaseModel):
    foo: str


class MyModelList(BaseCollectionModel[MyModel]):
    pass


if __name__ == "__main__":
    assert MyModelList([{"foo": "bar"}, {"foo": "baz"}])

When running this code in an environment using pydantic==2.2.1 I get the following exception:

Traceback (most recent call last):
  File "/Users/matthewelwell/projects/sandbox/pydantic2collections/models.py", line 2, in <module>
    from pydantic_collections import BaseCollectionModel
  File "/Users/matthewelwell/projects/sandbox/pydantic2collections/.venv/lib/python3.11/site-packages/pydantic_collections/__init__.py", line 10, in <module>
    from ._v2 import BaseCollectionModel, CollectionModelConfig
  File "/Users/matthewelwell/projects/sandbox/pydantic2collections/.venv/lib/python3.11/site-packages/pydantic_collections/_v2.py", line 86, in <module>
    class BaseCollectionModel(
  File "/Users/matthewelwell/projects/sandbox/pydantic2collections/.venv/lib/python3.11/site-packages/pydantic/_internal/_model_construction.py", line 123, in __new__
    cls: type[BaseModel] = super().__new__(mcs, cls_name, bases, namespace, **kwargs)  # type: ignore
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen abc>", line 106, in __new__
  File "/Users/matthewelwell/projects/sandbox/pydantic2collections/.venv/lib/python3.11/site-packages/pydantic/root_model.py", line 50, in __init_subclass__
    raise PydanticUserError(
pydantic.errors.PydanticUserError: `RootModel` does not support setting `model_config['extra']`

Note that I found this error while trying to reproduce another error I have found when using pydantic collections with v2. I was trying to create a minimal environment to reproduce it and instead found this. I will let you know if/when I can reproduce the other error I am having.

[matthewelwell]

It seems like it was broken here but from the comment in that PR, I have a feeling that the setting of extra='forbid' in the BaseCollectionModel.model_config attribute never worked anyway?

Because `RootModel` is not capable of storing or even accepting extra fields during initialization, we raise an error
if you try to specify a value for the config setting `'extra'` when creating a subclass of `RootModel`

[romis2012]

Fixed in v0.5.1  

Вторник, 22 августа 2023, 10:13 +03:00 от Matthew Elwell ***@***.***>:     Hi @romis2012 , it seems like there are compatibility issues with pydantic==2.2.1? Perhaps this is a pydantic issue rather than a pydantic-collection issue so please forgive me if so but, given the relevance of this issue, I figured I would raise it here first. The following code works with pydantic==2.1.1 but not 2.2.1. from pydantic import BaseModel from pydantic_collections import BaseCollectionModel class MyModel(BaseModel): foo: str class MyModelList(BaseCollectionModel[MyModel]): pass if __name__ == "__main__": assert MyModelList([{"foo": "bar"}, {"foo": "baz"}]) When running this code in an environment using pydantic==2.2.1 I get the following exception: Traceback (most recent call last): File "/Users/matthewelwell/projects/sandbox/pydantic2collections/models.py", line 2, in <module> from pydantic_collections import BaseCollectionModel File "/Users/matthewelwell/projects/sandbox/pydantic2collections/.venv/lib/python3.11/site-packages/pydantic_collections/__init__.py", line 10, in <module> from ._v2 import BaseCollectionModel, CollectionModelConfig File "/Users/matthewelwell/projects/sandbox/pydantic2collections/.venv/lib/python3.11/site-packages/pydantic_collections/_v2.py", line 86, in <module> class BaseCollectionModel( File "/Users/matthewelwell/projects/sandbox/pydantic2collections/.venv/lib/python3.11/site-packages/pydantic/_internal/_model_construction.py", line 123, in __new__ cls: type[BaseModel] = super().__new__(mcs, cls_name, bases, namespace, **kwargs) # type: ignore ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "<frozen abc>", line 106, in __new__ File "/Users/matthewelwell/projects/sandbox/pydantic2collections/.venv/lib/python3.11/site-packages/pydantic/root_model.py", line 50, in __init_subclass__ raise PydanticUserError( pydantic.errors.PydanticUserError: `RootModel` does not support setting `model_config['extra']` Note that I found this error while trying to reproduce another error I have found when using pydantic collections with v2. I was trying to create a minimal environment to reproduce it and instead found this. I will let you know if/when I can reproduce the other error I am having. — Reply to this email directly, view it on GitHub , or unsubscribe . You are receiving this because you were mentioned. Message ID: <romis2012/pydantic-collections/issues/2/1687605324 @ github . com>

    -- Роман Снегирев