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from __future__ import annotations
from dataclasses import dataclass, field
from typing import TYPE_CHECKING
from litestar.exceptions import ImproperlyConfiguredException
if TYPE_CHECKING:
from typing import AbstractSet
from litestar.dto.types import RenameStrategy
__all__ = ("DTOConfig",)
@dataclass(frozen=True)
class DTOConfig:
"""Control the generated DTO."""
exclude: AbstractSet[str] = field(default_factory=set)
"""Explicitly exclude fields from the generated DTO.
If exclude is specified, all fields not specified in exclude will be included by default.
Notes:
- The field names are dot-separated paths to nested fields, e.g. ``"address.street"`` will
exclude the ``"street"`` field from a nested ``"address"`` model.
- 'exclude' mutually exclusive with 'include' - specifying both values will raise an
``ImproperlyConfiguredException``.
"""
include: AbstractSet[str] = field(default_factory=set)
"""Explicitly include fields in the generated DTO.
If include is specified, all fields not specified in include will be excluded by default.
Notes:
- The field names are dot-separated paths to nested fields, e.g. ``"address.street"`` will
include the ``"street"`` field from a nested ``"address"`` model.
- 'include' mutually exclusive with 'exclude' - specifying both values will raise an
``ImproperlyConfiguredException``.
"""
rename_fields: dict[str, str] = field(default_factory=dict)
"""Mapping of field names, to new name."""
rename_strategy: RenameStrategy | None = None
"""Rename all fields using a pre-defined strategy or a custom strategy.
The pre-defined strategies are: `upper`, `lower`, `camel`, `pascal`.
A custom strategy is any callable that accepts a string as an argument and
return a string.
Fields defined in ``rename_fields`` are ignored."""
max_nested_depth: int = 1
"""The maximum depth of nested items allowed for data transfer."""
partial: bool = False
"""Allow transfer of partial data."""
underscore_fields_private: bool = True
"""Fields starting with an underscore are considered private and excluded from data transfer."""
experimental_codegen_backend: bool | None = None
"""Use the experimental codegen backend"""
def __post_init__(self) -> None:
if self.include and self.exclude:
raise ImproperlyConfiguredException(
"'include' and 'exclude' are mutually exclusive options, please use one of them"
)
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