full model for these 3 classes:
# machine
class Machine(Base):
__tablename__ = 'machine'
machine_ID = Column(Integer, primary_key=True)
machine_Type = Column(Integer, nullable=False)
machine_model = Column(String(10), nullable=False)
machine_Weight = Column(Integer)
machine_price = Column(Float(), nullable=False)
saleRel = relationship('Sale', secondary='sale_product')
children = relationship("Options",
secondary='machine_options',
back_populates="parents")
# options
class Options(Base):
__tablename__ = 'options'
options_ID = Column(Integer, primary_key=True)
options_category = Column(String(10), nullable=False)
options_Price = Column(Float(), nullable=False)
options_Type_FK = Column(Integer, ForeignKey(
'options_Type.options_Type_ID'))
parents = relationship("Machine",
secondary=Machine_Options, back_populates="children")
#machine_options
Machine_Options = Table('machine_options', Base.metadata,
Column('machine_FK', Integer, ForeignKey('machine.machine_ID'),
primary_key=True),
Column('options_FK',Integer, ForeignKey('options.options_ID'),
primary_key=True))
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
Example. See http://stackoverflow.com/help/mcve for a full description.
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