from sqlalchemy import create_engine, Column, Integer, String, Date, Text, ForeignKey
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship, sessionmaker

engine = create_engine('sqlite:///sugarcane.db')
Base = declarative_base()
Session = sessionmaker(bind=engine)
session = Session()

class User(Base):
    __tablename__ = 'user'
    id = Column(Integer, primary_key=True)
    username = Column(String(150), unique=True, nullable=False)
    password = Column(String(150), nullable=False)

class FarmData(Base):
    __tablename__ = 'farm_data'
    id = Column(Integer, primary_key=True)
    date = Column(Date, nullable=False)
    data = Column(Text, nullable=False)
    user_id = Column(Integer, ForeignKey('user.id'), nullable=False)
    user = relationship('User', backref='farm_data')

Base.metadata.create_all(engine)