[Python] Pydantic "Input should be a valid string" when constructing with dictionary

This is the beginning of the class code, the dictionary I am using to construct the class, and the lines where the code fails.

from beanie import Document
from pydantic import Field, ConfigDict, field_validator
class Schema(Document):
model_config = ConfigDict(extra='forbid')
name: str = Field(alias='name')
description: str = Field(alias='description')
date: int = Field(alias='date')


def get_default_schema():
schema_dict = {
'name': 'schema_name',
'description': 'my description',
'date': 2022
}
return schema_dict


schema_dict = get_default_schema()
sch = Schema(**schema_dict)


This is the error pydantic returns

self = Schema(), args = ()
kwargs = {'date': 2022, 'description': 'my description', 'name': 'schema_name'}

def __init__(self, *args: Any, **kwargs: Any) -> None:
> super(Document, self).__init__(*args, **kwargs)
E pydantic_core._pydantic_core.ValidationError: 2 validation errors for Schema
E description
E Input should be a valid string [type=string_type, input_value=None, input_type=NoneType]
E For further information visit https://errors.pydantic.dev/2.10/v/string_type
E date
E Input should be a valid integer [type=int_type, input_value=None, input_type=NoneType]
E For further information visit https://errors.pydantic.dev/2.10/v/int_type


All of the data types are specified correctly in the class and the dictionary, and I have an example file of this kind of class construction that functions perfectly fine. It seems like pydantic isn't recognizing 2 out of the 3 attributes for some reason. Maybe I'm just missing something obvious.

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