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aliases.py

"""Support for alias configurations."""

from __future__ import annotations

import dataclasses
from typing import Any, Callable, Literal

from pydantic_core import PydanticUndefined

from ._internal import _internal_dataclass

__all__ = ('AliasGenerator', 'AliasPath', 'AliasChoices')

@dataclasses.dataclass(**_internal_dataclass.slots_true)
class AliasPath:
    """Usage docs: https://docs.pydantic.dev/2.8/concepts/alias#aliaspath-and-aliaschoices

A data class used by `validation_alias` as a convenience to create aliases.

Attributes:
        path: A list of string or integer aliases.
    """

path: list[int | str]

def __init__(self, first_arg: str, *args: str | int) -> None:
        self.path = [first_arg] + list(args)

def convert_to_aliases(self) -> list[str | int]:
        """Converts arguments to a list of string or integer aliases.

Returns:
            The list of aliases.
        """
        return self.path

def search_dict_for_path(self, d: dict) -> Any:
        """Searches a dictionary for the path specified by the alias.

Returns:
            The value at the specified path, or `PydanticUndefined` if the path is not found.
        """
        v = d
        for k in self.path:
            if isinstance(v, str):
                # disallow indexing into a str, like for AliasPath('x', 0) and x='abc'
                return PydanticUndefined
            try:
                v = v[k]
            except (KeyError, IndexError, TypeError):
                return PydanticUndefined
        return v

@dataclasses.dataclass(**_internal_dataclass.slots_true)
class AliasChoices:
    """Usage docs: https://docs.pydantic.dev/2.8/concepts/alias#aliaspath-and-aliaschoices

A data class used by `validation_alias` as a convenience to create aliases.

Attributes:
        choices: A list containing a string or `AliasPath`.
    """

choices: list[str | AliasPath]

def __init__(self, first_choice: str | AliasPath, *choices: str | AliasPath) -> None:
        self.choices = [first_choice] + list(choices)

def convert_to_aliases(self) -> list[list[str | int]]:
        """Converts arguments to a list of lists containing string or integer aliases.

Returns:
            The list of aliases.
        """
        aliases: list[list[str | int]] = []
        for c in self.choices:
            if isinstance(c, AliasPath):
                aliases.append(c.convert_to_aliases())
            else:
                aliases.append([c])
        return aliases

@dataclasses.dataclass(**_internal_dataclass.slots_true)
class AliasGenerator:
    """Usage docs: https://docs.pydantic.dev/2.8/concepts/alias#using-an-aliasgenerator

A data class used by `alias_generator` as a convenience to create various aliases.

Attributes:
        alias: A callable that takes a field name and returns an alias for it.
        validation_alias: A callable that takes a field name and returns a validation alias for it.
        serialization_alias: A callable that takes a field name and returns a serialization alias for it.
    """

def _generate_alias(
        self,
        alias_kind: Literal['alias', 'validation_alias', 'serialization_alias'],
        allowed_types: tuple[type[str] | type[AliasPath] | type[AliasChoices], ...],
        field_name: str,
    ) -> str | AliasPath | AliasChoices | None:
        """Generate an alias of the specified kind. Returns None if the alias generator is None.

Raises:
            TypeError: If the alias generator produces an invalid type.
        """
        alias = None
        if alias_generator := getattr(self, alias_kind):
            alias = alias_generator(field_name)
            if alias and not isinstance(alias, allowed_types):
                raise TypeError(
                    f'Invalid `{alias_kind}` type. `{alias_kind}` generator must produce one of `{allowed_types}`'
                )
        return alias

Returns:
            A tuple of three aliases - validation, alias, and serialization.
        """
        alias = self._generate_alias('alias', (str,), field_name)
        validation_alias = self._generate_alias('validation_alias', (str, AliasChoices, AliasPath), field_name)
        serialization_alias = self._generate_alias('serialization_alias', (str,), field_name)

return alias, validation_alias, serialization_alias  # type: ignore

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2025-04-04 08:05:50
..	dir	-	root/root	0755	2025-05-23 07:07:14
__pycache__	dir	-	root/root	0755	2025-04-04 08:05:51
_internal	dir	-	root/root	0755	2025-04-04 08:05:50
deprecated	dir	-	root/root	0755	2025-04-04 08:05:50
experimental	dir	-	root/root	0755	2025-04-04 08:05:50
plugin	dir	-	root/root	0755	2025-04-04 08:05:51
v1	dir	-	root/root	0755	2025-04-04 08:05:51
__init__.py	text/x-script.python	13.6 KB	root/root	0644	2025-04-04 08:05:50
_migration.py	text/x-script.python	11.63 KB	root/root	0644	2025-04-04 08:05:50
alias_generators.py	text/plain	2.07 KB	root/root	0644	2025-04-04 08:05:50
aliases.py	text/plain	4.71 KB	root/root	0644	2025-04-04 08:05:50
annotated_handlers.py	text/plain	4.25 KB	root/root	0644	2025-04-04 08:05:50
class_validators.py	text/plain	148 B	root/root	0644	2025-04-04 08:05:50
color.py	text/plain	20.99 KB	root/root	0644	2025-04-04 08:05:50
config.py	text/plain	34.29 KB	root/root	0644	2025-04-04 08:05:50
dataclasses.py	text/plain	13.58 KB	root/root	0644	2025-04-04 08:05:50
datetime_parse.py	text/plain	150 B	root/root	0644	2025-04-04 08:05:50
decorator.py	text/plain	145 B	root/root	0644	2025-04-04 08:05:50
env_settings.py	text/plain	148 B	root/root	0644	2025-04-04 08:05:50
error_wrappers.py	text/plain	150 B	root/root	0644	2025-04-04 08:05:50
errors.py	text/plain	4.72 KB	root/root	0644	2025-04-04 08:05:50
fields.py	text/plain	50.53 KB	root/root	0644	2025-04-04 08:05:50
functional_serializers.py	text/plain	14.27 KB	root/root	0644	2025-04-04 08:05:50
functional_validators.py	text/plain	23.66 KB	root/root	0644	2025-04-04 08:05:50
generics.py	text/plain	144 B	root/root	0644	2025-04-04 08:05:50
json.py	text/plain	140 B	root/root	0644	2025-04-04 08:05:50
json_schema.py	text/plain	103.81 KB	root/root	0644	2025-04-04 08:05:50
main.py	text/plain	68.46 KB	root/root	0644	2025-04-04 08:05:50
mypy.py	text/plain	55.64 KB	root/root	0644	2025-04-04 08:05:50
networks.py	text/plain	22.18 KB	root/root	0644	2025-04-04 08:05:50
parse.py	text/plain	141 B	root/root	0644	2025-04-04 08:05:50
py.typed	application/x-empty	0 B	root/root	0644	2025-04-04 08:05:50
root_model.py	text/plain	6.05 KB	root/root	0644	2025-04-04 08:05:50
schema.py	text/plain	142 B	root/root	0644	2025-04-04 08:05:50
tools.py	text/plain	141 B	root/root	0644	2025-04-04 08:05:50
type_adapter.py	text/plain	24.39 KB	root/root	0644	2025-04-04 08:05:50
types.py	text/plain	93.5 KB	root/root	0644	2025-04-04 08:05:50
typing.py	text/plain	138 B	root/root	0644	2025-04-04 08:05:50
utils.py	text/plain	141 B	root/root	0644	2025-04-04 08:05:50
validate_call_decorator.py	text/plain	2.08 KB	root/root	0644	2025-04-04 08:05:50
validators.py	text/plain	146 B	root/root	0644	2025-04-04 08:05:50
version.py	text/plain	2.38 KB	root/root	0644	2025-04-04 08:05:50
warnings.py	text/plain	2.65 KB	root/root	0644	2025-04-04 08:05:50

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