old_contents: from sqlalchemy import Column, Integer, String, DateTime, text, ForeignKey
  from .base import Base
  
  class Link(Base):
  	 """Link table"""
  
  	__tablename__ = 'link'
  
  	id = Column(Integer, primary_key=True)
  	from_page_id = Column(Integer, ForeignKey('page.id'))
  	to_page_id = Column(Integer, ForeignKey('page.id'))
  	number_of_separation = Column(Integer, nullable=False)
  	created = Column(DateTime, nullable=False, server_default=text('CURRENT_TIMESTAMP'))
  
  	def __repr__(self):
  		return "<Link(from_page_id='%s', to_page_id='%s', number_of_separation='%s', created='%s')>" % (
  			self.from_page_id, self.to_page_id, self.number_of_separation, self.created)
  
new_contents: from sqlalchemy import Column, Integer, String, DateTime, text, ForeignKey
  from .base import Base
  
  class Link(Base):
  	"""Link table"""
  	__tablename__ = 'link'
  
  	id = Column(Integer, primary_key=True)
  	from_page_id = Column(Integer, ForeignKey('page.id'))
  	to_page_id = Column(Integer, ForeignKey('page.id'))
  	number_of_separation = Column(Integer, nullable=False)
  	created = Column(DateTime, nullable=False, server_default=text('CURRENT_TIMESTAMP'))
  
  	def __repr__(self):
  		return "<Link(from_page_id='%s', to_page_id='%s', number_of_separation='%s', created='%s')>" % (
  			self.from_page_id, self.to_page_id, self.number_of_separation, self.created)
  
subject: Fix indentation