text: from sqlalchemy import Column, String, Integer, ForeignKey
  from sqlalchemy.orm import relationship
  
  from base import Base
  
  class Department(Base):
      __tablename__ = 'departments'
  
      id = Column(Integer, primary_key=True)
      name = Column(String(length=50))
      employees = relationship("Employee")
  
      def __init__(self, name):
          self.name = name