text: from sqlalchemy import Column, String, Boolean, Integer, ForeignKey, Text
  from sqlalchemy.orm import relationship
  
  from app.models.base import Base
  
  
  class PredictBuildings(Base):
      gid = Column(Integer, primary_key=True, autoincrement=True)
      geom = Column(Text)
      task_id = Column(Integer, primary_key=True)
      extent = Column(String(256))
      user_id = Column(String(50))
      area_code = Column(String(50))
      state = Column(Integer, default=1)
      status = Column(Integer, default=1)
  