1 files changed, 107 insertions, 0 deletions
diff --git a/venv/lib/python3.11/site-packages/litestar/contrib/piccolo.py b/venv/lib/python3.11/site-packages/litestar/contrib/piccolo.py
new file mode 100644
index 0000000..73bd271
--- /dev/null
+++ b/venv/lib/python3.11/site-packages/litestar/contrib/piccolo.py
@@ -0,0 +1,107 @@
+from __future__ import annotations
+
+import warnings
+from dataclasses import replace
+from decimal import Decimal
+from typing import Any, Generator, Generic, List, Optional, TypeVar
+
+from msgspec import Meta
+from typing_extensions import Annotated
+
+from litestar.dto import AbstractDTO, DTOField, Mark
+from litestar.dto.data_structures import DTOFieldDefinition
+from litestar.exceptions import LitestarWarning, MissingDependencyException
+from litestar.types import Empty
+from litestar.typing import FieldDefinition
+from litestar.utils import warn_deprecation
+
+try:
+    from piccolo.columns import Column, column_types
+    from piccolo.table import Table
+except ImportError as e:
+    raise MissingDependencyException("piccolo") from e
+
+
+T = TypeVar("T", bound=Table)
+
+__all__ = ("PiccoloDTO",)
+
+
+def __getattr__(name: str) -> Any:
+    warn_deprecation(
+        deprecated_name=f"litestar.contrib.piccolo.{name}",
+        version="2.3.2",
+        kind="import",
+        removal_in="3.0.0",
+        info="importing from 'litestar.contrib.piccolo' is deprecated and will be removed in 3.0, please import from 'litestar_piccolo' package directly instead",
+    )
+    return getattr(name, name)
+
+
+def _parse_piccolo_type(column: Column, extra: dict[str, Any]) -> FieldDefinition:
+    is_optional = not column._meta.required
+
+    if isinstance(column, (column_types.Decimal, column_types.Numeric)):
+        column_type: Any = Decimal
+        meta = Meta(extra=extra)
+    elif isinstance(column, (column_types.Email, column_types.Varchar)):
+        column_type = str
+        if is_optional:
+            meta = Meta(extra=extra)
+            warnings.warn(
+                f"Dropping max_length constraint for column {column!r} because the " "column is optional",
+                category=LitestarWarning,
+                stacklevel=2,
+            )
+        else:
+            meta = Meta(max_length=column.length, extra=extra)
+    elif isinstance(column, column_types.Array):
+        column_type = List[column.base_column.value_type]  # type: ignore[name-defined]
+        meta = Meta(extra=extra)
+    elif isinstance(column, (column_types.JSON, column_types.JSONB)):
+        column_type = str
+        meta = Meta(extra={**extra, "format": "json"})
+    elif isinstance(column, column_types.Text):
+        column_type = str
+        meta = Meta(extra={**extra, "format": "text-area"})
+    else:
+        column_type = column.value_type
+        meta = Meta(extra=extra)
+
+    if is_optional:
+        column_type = Optional[column_type]
+
+    return FieldDefinition.from_annotation(Annotated[column_type, meta])
+
+
+def _create_column_extra(column: Column) -> dict[str, Any]:
+    extra: dict[str, Any] = {}
+
+    if column._meta.help_text:
+        extra["description"] = column._meta.help_text
+
+    if column._meta.get_choices_dict():
+        extra["enum"] = column._meta.get_choices_dict()
+
+    return extra
+
+
+class PiccoloDTO(AbstractDTO[T], Generic[T]):
+    @classmethod
+    def generate_field_definitions(cls, model_type: type[Table]) -> Generator[DTOFieldDefinition, None, None]:
+        for column in model_type._meta.columns:
+            mark = Mark.WRITE_ONLY if column._meta.secret else Mark.READ_ONLY if column._meta.primary_key else None
+            yield replace(
+                DTOFieldDefinition.from_field_definition(
+                    field_definition=_parse_piccolo_type(column, _create_column_extra(column)),
+                    dto_field=DTOField(mark=mark),
+                    model_name=model_type.__name__,
+                    default_factory=None,
+                ),
+                default=Empty if column._meta.required else None,
+                name=column._meta.name,
+            )
+
+    @classmethod
+    def detect_nested_field(cls, field_definition: FieldDefinition) -> bool:
+        return field_definition.is_subclass_of(Table)