Let's suppose that we have two tables in the database: the table user with columns id, name, surname, and the table phone_number with columns id, user_id, and phone. The column user_id makes a connection between tables.
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id = Column(Integer, primary_key=True)
user_id = Column(Integer, ForeignKey("user.id"))
from sqlalchemy.orm import declarative_base, relationship
class User(Base):
phone = relationship("PhoneNumber")
id = Column(Integer, primary_key=True)
__tablename__ = "phone_number"
name = Column(String(255), unique=True, nullable=False)
phone = Column(Integer, unique=True, nullable=False)
surname = Column(String(255), unique=True, nullable=False)
Base = declarative_base()
user = relationship("User")
class PhoneNumber(Base):
__tablename__ = "user"
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