Change Summary

This adds support for Decimal-specific configs, that would only be supported with condecimal(), in Field().

I want this in particular here to then be able to also support it in SQLModel. 🤓

This means that an example like this:

from pydantic import BaseModel, condecimal


class Model(BaseModel):
    decimal_max_digits_and_places: condecimal(max_digits=2, decimal_places=2)

could also be written like this:

from decimal import Decimal
from pydantic import BaseModel, Field


class Model(BaseModel):
    decimal_max_digits_and_places: Decimal = Field(max_digits=2, decimal_places=2)

The main advantage is that editors and tools can provide better support when the type is static and not the return of a function (that works at runtime, but tools struggle with it during static analysis, etc).

E.g. the autocompletion for condecimal:

And the autocompletion for the new alternative:

Related issue number

Checklist

• Unit tests for the changes exist
• Tests pass on CI and coverage remains at 100%
• Documentation reflects the changes where applicable
• changes/<pull request or issue id>-<github username>.md file added describing change
  (see changes/README.md for details)
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers