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import logging
from datetime import date, datetime, time, timedelta
from decimal import Decimal
from enum import Enum
from typing import Any, Dict, List, Union
from uuid import UUID
from django.utils.functional import Promise
from pydantic.v1 import IPvAnyAddress, Json
from pydantic.v1.fields import FieldInfo, Required, Undefined
logger = logging.getLogger("djantic")
INT_TYPES = [
"AutoField",
"BigAutoField",
"IntegerField",
"SmallIntegerField",
"BigIntegerField",
"PositiveIntegerField",
"PositiveSmallIntegerField",
]
STR_TYPES = [
"CharField",
"EmailField",
"URLField",
"SlugField",
"TextField",
"FilePathField",
"FileField",
]
FIELD_TYPES = {
"GenericIPAddressField": IPvAnyAddress,
"BooleanField": bool,
"BinaryField": bytes,
"DateField": date,
"DateTimeField": datetime,
"DurationField": timedelta,
"TimeField": time,
"DecimalField": Decimal,
"FloatField": float,
"UUIDField": UUID,
"JSONField": Union[Json, dict, list], # TODO: Configure this using default
"ArrayField": List,
# "BigIntegerRangeField",
# "CICharField",
# "CIEmailField",
# "CIText",
# "CITextField",
# "DateRangeField",
# "DateTimeRangeField",
# "DecimalRangeField",
# "FloatRangeField",
# "HStoreField",
# "IntegerRangeField",
# "RangeBoundary",
# "RangeField",
# "RangeOperators",
}
def ModelSchemaField(field: Any, schema_name: str) -> tuple:
default = Required
default_factory = None
description = None
title = None
max_length = None
python_type = None
if field.is_relation:
if not field.related_model:
internal_type = field.model._meta.pk.get_internal_type()
else:
internal_type = field.related_model._meta.pk.get_internal_type()
if not field.concrete and field.auto_created or field.null:
default = None
pk_type = FIELD_TYPES.get(internal_type, int)
if field.one_to_many or field.many_to_many:
python_type = List[Dict[str, pk_type]]
else:
python_type = pk_type
if field.related_model:
field = field.target_field
else:
if field.choices:
enum_choices = {}
for k, v in field.choices:
if Promise in type(v).__mro__:
v = str(v)
enum_choices[v] = k
if field.blank:
enum_choices['_blank'] = ''
enum_prefix = (
f"{schema_name.replace('_', '')}{field.name.title().replace('_', '')}"
)
python_type = Enum( # type: ignore
f"{enum_prefix}Enum",
enum_choices,
module=__name__,
)
if field.has_default() and isinstance(field.default, Enum):
default = field.default.value
else:
internal_type = field.get_internal_type()
if internal_type in STR_TYPES:
python_type = str
if not field.choices:
max_length = field.max_length
elif internal_type in INT_TYPES:
python_type = int
elif internal_type in FIELD_TYPES:
python_type = FIELD_TYPES[internal_type]
else: # pragma: nocover
for field_class in type(field).__mro__:
get_internal_type = getattr(field_class, "get_internal_type", None)
if get_internal_type:
_internal_type = get_internal_type(field_class())
if _internal_type in FIELD_TYPES:
python_type = FIELD_TYPES[_internal_type]
break
if python_type is None:
logger.warning(
"%s is currently unhandled, defaulting to str.", field.__class__
)
python_type = str
deconstructed = field.deconstruct()
field_options = deconstructed[3] or {}
blank = field_options.pop("blank", False)
null = field_options.pop("null", False)
if default is Required and field.has_default():
if callable(field.default):
default_factory = field.default
default = Undefined
else:
default = field.default
elif field.primary_key or blank or null:
default = None
if default is not None and field.null:
python_type = Union[python_type, None]
description = field.help_text
title = field.verbose_name.title()
if not description:
description = field.name
return (
python_type,
FieldInfo(
default,
default_factory=default_factory,
title=title,
description=str(description),
max_length=max_length,
),
)
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