8ed856d322
Co-authored-by: Mohamed Farahat <farahats9@yahoo.com> Co-authored-by: Stefan Borer <stefan.borer@gmail.com> Co-authored-by: Peter Landry <peter.landry@gmail.com>
60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
import uuid
|
|
from typing import Any, Optional, cast
|
|
|
|
from sqlalchemy import CHAR, types
|
|
from sqlalchemy.dialects.postgresql import UUID
|
|
from sqlalchemy.engine.interfaces import Dialect
|
|
from sqlalchemy.sql.type_api import TypeEngine
|
|
|
|
|
|
class AutoString(types.TypeDecorator): # type: ignore
|
|
impl = types.String
|
|
cache_ok = True
|
|
mysql_default_length = 255
|
|
|
|
def load_dialect_impl(self, dialect: Dialect) -> "types.TypeEngine[Any]":
|
|
impl = cast(types.String, self.impl)
|
|
if impl.length is None and dialect.name == "mysql":
|
|
return dialect.type_descriptor(types.String(self.mysql_default_length))
|
|
return super().load_dialect_impl(dialect)
|
|
|
|
|
|
# Reference form SQLAlchemy docs: https://docs.sqlalchemy.org/en/14/core/custom_types.html#backend-agnostic-guid-type
|
|
# with small modifications
|
|
class GUID(types.TypeDecorator): # type: ignore
|
|
"""Platform-independent GUID type.
|
|
|
|
Uses PostgreSQL's UUID type, otherwise uses
|
|
CHAR(32), storing as stringified hex values.
|
|
|
|
"""
|
|
|
|
impl = CHAR
|
|
cache_ok = True
|
|
|
|
def load_dialect_impl(self, dialect: Dialect) -> TypeEngine[Any]:
|
|
if dialect.name == "postgresql":
|
|
return dialect.type_descriptor(UUID())
|
|
else:
|
|
return dialect.type_descriptor(CHAR(32))
|
|
|
|
def process_bind_param(self, value: Any, dialect: Dialect) -> Optional[str]:
|
|
if value is None:
|
|
return value
|
|
elif dialect.name == "postgresql":
|
|
return str(value)
|
|
else:
|
|
if not isinstance(value, uuid.UUID):
|
|
return uuid.UUID(value).hex
|
|
else:
|
|
# hexstring
|
|
return value.hex
|
|
|
|
def process_result_value(self, value: Any, dialect: Dialect) -> Optional[uuid.UUID]:
|
|
if value is None:
|
|
return value
|
|
else:
|
|
if not isinstance(value, uuid.UUID):
|
|
value = uuid.UUID(value)
|
|
return cast(uuid.UUID, value)
|