# Aliases

Support for alias configurations.

## AliasPath

:::callout{intent="note" title="Usage Documentation"}
[`AliasPath` and `AliasChoices`](/guides/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.

**Type:** [`list`](https://docs.python.org/3/glossary.html#term-list)\[[`int`](https://docs.python.org/3/builtins/functions.html#int) | [`str`](https://docs.python.org/3/builtins/stdtypes.html#str)]

### Methods

#### convert\_to\_aliases

```python
def convert_to_aliases() -> list[str | int]
```

Converts arguments to a list of string or integer aliases.

##### Returns

[`list`](https://docs.python.org/3/glossary.html#term-list)\[[`str`](https://docs.python.org/3/builtins/stdtypes.html#str) | [`int`](https://docs.python.org/3/builtins/functions.html#int)] — The list of aliases.

#### search\_dict\_for\_path

```python
def search_dict_for_path(d: dict) -> Any
```

Searches a dictionary for the path specified by the alias.

##### Returns

[`Any`](https://docs.python.org/3/library/typing.html#typing.Any) — The value at the specified path, or `PydanticUndefined` if the path is not found.

## AliasChoices

:::callout{intent="note" title="Usage Documentation"}
[`AliasPath` and `AliasChoices`](/guides/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`.

**Type:** [`list`](https://docs.python.org/3/glossary.html#term-list)\[[`str`](https://docs.python.org/3/builtins/stdtypes.html#str) | [`AliasPath`](/guides/pydantic-aliases#aliaspath)]

### Methods

#### convert\_to\_aliases

```python
def convert_to_aliases() -> list[list[str | int]]
```

Converts arguments to a list of lists containing string or integer aliases.

##### Returns

[`list`](https://docs.python.org/3/glossary.html#term-list)\[[`list`](https://docs.python.org/3/glossary.html#term-list)\[[`str`](https://docs.python.org/3/builtins/stdtypes.html#str) | [`int`](https://docs.python.org/3/builtins/functions.html#int)]] — The list of aliases.

## AliasGenerator

:::callout{intent="note" title="Usage Documentation"}
[Using an `AliasGenerator`](/guides/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.

**Type:** [`Callable`](https://docs.python.org/3/library/typing.html#typing.Callable)\[\[[`str`](https://docs.python.org/3/builtins/stdtypes.html#str)], [`str`](https://docs.python.org/3/builtins/stdtypes.html#str)] | [`None`](https://docs.python.org/3/builtins/constants.html#None)

#### validation\_alias

A callable that takes a field name and returns a validation alias for it.

**Type:** [`Callable`](https://docs.python.org/3/library/typing.html#typing.Callable)\[\[[`str`](https://docs.python.org/3/builtins/stdtypes.html#str)], [`str`](https://docs.python.org/3/builtins/stdtypes.html#str) | [`AliasPath`](/guides/pydantic-aliases#aliaspath) | [`AliasChoices`](/guides/pydantic-aliases#aliaschoices)] | [`None`](https://docs.python.org/3/builtins/constants.html#None)

#### serialization\_alias

A callable that takes a field name and returns a serialization alias for it.

**Type:** [`Callable`](https://docs.python.org/3/library/typing.html#typing.Callable)\[\[[`str`](https://docs.python.org/3/builtins/stdtypes.html#str)], [`str`](https://docs.python.org/3/builtins/stdtypes.html#str)] | [`None`](https://docs.python.org/3/builtins/constants.html#None)

### Methods

#### generate\_aliases

```python
def generate_aliases(
    field_name: str,
) -> tuple[str | None, str | AliasPath | AliasChoices | None, str | None]
```

Generate `alias`, `validation_alias`, and `serialization_alias` for a field.

##### Returns

[`tuple`](https://docs.python.org/3/builtins/stdtypes.html#tuple)\[[`str`](https://docs.python.org/3/builtins/stdtypes.html#str) | [`None`](https://docs.python.org/3/builtins/constants.html#None), [`str`](https://docs.python.org/3/builtins/stdtypes.html#str) | [`AliasPath`](/guides/pydantic-aliases#aliaspath) | [`AliasChoices`](/guides/pydantic-aliases#aliaschoices) | [`None`](https://docs.python.org/3/builtins/constants.html#None), [`str`](https://docs.python.org/3/builtins/stdtypes.html#str) | [`None`](https://docs.python.org/3/builtins/constants.html#None)] — A tuple of three aliases - validation, alias, and serialization.

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