pydantic settings alias choices
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Today I learned how to use AliasChoices with pydantic settings to setup common aliases for the same field. I'm bad about remembering these things, and hate...

Date: November 11, 2025

Today I learned how to use AliasChoices with pydantic settings to setup common aliases for the same field. I’m bad about remembering these things, and hate looking up the docs. I like things to be intuitive and just do the thing I want it to do. Especially when they get configured through something like yaml and do not have a direct lsp look up right from my editor. I figured out how to support what might be common aliases for a storage directory. These can be set up as environment variables and used by config.

[code]
  from pathlib import Path

  from pydantic import Field
  from pydantic import AliasChoices
  from pydantic_settings import BaseSettings

  class Settings(BaseSettings):
      storage_dir: Path | None = Field(
          default=None,
          validation_alias=AliasChoices(
              "STORAGE_DIR", "STORAGE_DIRECTORY", "STORAGE_PATH", "STORAGE_PATHNAME",
              "DROPPER_STORAGE_DIR", "DROPPER_STORAGE_DIRECTORY", "DROPPER_STORAGE_PATH", "DROPPER_STORAGE_PATHNAME",
          ),
          description="Directory for stored files",
      )