Philosopher’s stone (xerion) they are looking for by all (SQL) alchemists That hypothetical library they believed could convert some code into gold. Now, this is available in PyPI.
$ pip install SQLXerionFirst of all, you need to initialize SQLXerion extension.
from xerion.extensions import DataBase
class App(NamedTuple):
config: dict
app = App(config={'SQLALCHEMY_DATABASE_URI': 'sqlite://'})
db = DataBase()
db.init_app(app)Then create your models:
class ValueModel(db.Model):
__tablename__ = "value_model"
id = db.IntField(primary_key=True)
name = db.StrField(nullable=False)class ValueModel(db.Model):
__tablename__ = "values"
id = db.IntField(primary_key=True)
name = db.StrField(nullable=False)
class FooModel(db.Model):
__tablename__ = "foos"
id = db.IntField(primary_key=True)
value = db.ForeignKey(ValueModel)is equal to:
class ValueModel(Base):
__tablename__ = "values"
id = Column(Integer, primary_key=True)
value = Column(String)
foos = relationship("FooModel")
class FooModel(db.Model):
__tablename__ = "foos"
id = Column(Integer, primary_key=True)
value_id = Column(Integer, ForeignKey('values.id'))
value = relationship(ValueModel)class ValueModel(db.Model):
__tablename__ = "values"
id = db.IntField(primary_key=True)
name = db.StrField(nullable=False)
class FooModel(db.Model):
__tablename__ = "foos"
id = db.IntField(primary_key=True)
values = db.ManyToMany(ValueModel)is equal to:
class ValueModel(Base):
__tablename__ = "values"
id = Column(Integer, primary_key=True)
value = Column(String)
foos = relationship("FooModel", secondary="foos_values_assoc")
class FooModel(db.Model):
foos_values = Table(
"foos_values_assoc",
Column('left_id', Integer, ForeignKey(f'foos.id')),
Column('right_id', Integer, ForeignKey(f'values.id'))
)
__tablename__ = "foos"
id = db.IntField(primary_key=True)
values = relationship(ValueModel, secondary="foos_values_assoc")