agronholm / agronholm/sqlacodegen
Dataclass Mapping changed in sqalchemy 2.0
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説明
Refer: https://docs.sqlalchemy.org/en/20/orm/dataclasses.html#orm-declarative-native-dataclasses
Current documented dataclass style is:
```python
from sqlalchemy.orm import DeclarativeBase
from sqlalchemy.orm import Mapped
from sqlalchemy.orm import mapped_column
from sqlalchemy.orm import MappedAsDataclass
class Base(MappedAsDataclass, DeclarativeBase):
"""subclasses will be converted to dataclasses"""
class User(Base):
__tablename__ = "user_account"
id: Mapped[int] = mapped_column(init=False, primary_key=True)
name: Mapped[str]
```
or at least:
```python
from sqlalchemy.orm import Mapped
from sqlalchemy.orm import mapped_column
from sqlalchemy.orm import registry
reg = registry()
@reg.mapped_as_dataclass
class User:
__tablename__ = "user_account"
id: Mapped[int] = mapped_column(init=False, primary_key=True)
name: Mapped[str]
```
Columns type should be `Mapped[int]` not `int` which is different with current sqlacodegen and the new `mapped_column` is much more readable.
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