SQLAlchemy字段映射python类型

我们需要对某个数据模型做参数校验， 用于api层的校验和入库前的参数检验，怎么做呢 show code

• code

  from sqlalchemy.ext.declarative import declarative_base
  from sqlalchemy import Column, Integer, String, BLOB, TEXT, TIMESTAMP
  
  
  base = declarative_base()
  
  
  class _VideoSeries(base):
  
      __tablename__ = 'video_series'
      series_id = Column(Integer, primary_key=True)
      series_name = Column(String(255))
      f_relevance_id = Column(Integer)
      f_cp_id = Column(String(255))
      f_usage = Column(Integer)
      f_screen_time = Column(String(16))
      status = Column(Integer)
      f_content_type = Column(Integer)
  
  
  print({i.name: i.type.python_type for i in _VideoSeries.__table__.columns})
  

• 输出

  {'status': , 'f_usage': , 'series_name': , 'f_relevance_id': , 'series_id': , 'f_screen_time': , 'f_content_type': , 'f_cp_id': }