from sqlalchemy import Column, Integer, DateTime, ForeignKey
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship

base = declarative_base()


class Delivery(base):
    __tablename__ = 'deliveries'

    id = Column(Integer, primary_key=True, autoincrement=True)
    count = Column(Integer, nullable=False)

    storage_accessories_id = Column(Integer, ForeignKey('storage_accessories.id'))
    step_id = Column(Integer, ForeignKey('steps.id'))

    storage_accessories = relationship('StorageAccessories', back_populates='delivery')
    step = relationship('Step', back_populates='delivery')