old_contents: #
  # database.py
  #
  # set up and manage a database for storing data between sessions
  #
  
  from sqlalchemy import Column, ForeignKey, Integer, String, Boolean
  from sqlalchemy.ext.declarative import declarative_base
  from sqlalchemy.orm import relationship
  from sqlalchemy import create_engine
  from sqlalchemy.orm import sessionmaker
  
  Base = declarative_base()
  
  class User(Base):
      __tablename__ = 'users'
      id = Column(Integer, primary_key=True)
      name = Column(String(250), nullable=False)
  
  class Server(Base):
      __tablename__ = 'servers'
      id = Column(Integer, primary_key=True)
      name = Column(String(250), nullable=False)
      owner = Column(Integer, ForeignKey('users.id'))
  
  class Role(Base):
      __tablename__ = 'roles'
      id = Column(Integer, primary_key=True)
      name = Column(String(250), nullable=False)
      server = Column(Integer, ForeignKey('servers.id'))
  
  class Channel(Base):
      __tablename__ = 'channels'
      id = Column(Integer, primary_key=True)
      name = Column(String(250), nullable=False)
      server = Column(Integer, ForeignKey('servers.id'))
      squelch = Column(Boolean, nullable=False)
  
  class CommandClass(Base):
      __tablename__ = 'commandclasses'
      id = Column(Integer, primary_key=True)
      name = Column(String(250), nullable=False)
  
  class Command(Base):
      __tablename__ = 'commands'
      id = Column(Integer, primary_key=True)
      name = Column(String(250), nullable=False)
      squelch = Column(Boolean, nullable=False)
      command_class = Column(Integer, ForeignKey('commandclasses.id'))
  
  class RoleCommandAccess(Base):
  	__tablename__ = 'rolecommands'
  	id = Column(Integer, primary_key=True)
  	role = Column(Integer, ForeignKey('roles.id'))
  	command = Column(Integer, ForeignKey('commands.id'))
  	squelch = Column(Boolean, nullable=False)
  
  class RoleCommandClassAccess(Base):
  	__tablename__ = 'rolecommandclasses'
  	id = Column(Integer, primary_key=True)
  	role = Column(Integer, ForeignKey('roles.id'))
  	command_class = Column(Integer, ForeignKey('commandclassess.id'))
  	squelch = Column(Boolean, nullable=False)
  
  class UserCommandAccess(Base):
  	__tablename__ = 'usercommands'
  	id = Column(Integer, primary_key=True)
  	user = Column(Integer, ForeignKey('users.id'))
  	command = Column(Integer, ForeignKey('commands.id'))
  	squelch = Column(Boolean, nullable=False)
  
  class UserCommandClassAccess(Base):
  	__tablename__ = 'usercommandclasses'
  	id = Column(Integer, primary_key=True)
  	user = Column(Integer, ForeignKey('users.id'))
  	command_class = Column(Integer, ForeignKey('commandclassess.id'))
  	squelch = Column(Boolean, nullable=False)
  
  
  
  # Create an engine that stores data in the local directory's
  # sqlalchemy_example.db file.
  engine = create_engine('sqlite:///susumu_takuan.db')
   
  # Create all tables in the engine. This is equivalent to "Create Table"
  # statements in raw SQL.
  Base.metadata.create_all(engine)
  
  DBSession = sessionmaker(bind=engine)
new_contents: #
  # database.py
  #
  # set up and manage a database for storing data between sessions
  #
  
  from sqlalchemy import Column, ForeignKey, Integer, String, Boolean
  from sqlalchemy.ext.declarative import declarative_base
  from sqlalchemy.orm import relationship
  from sqlalchemy import create_engine
  from sqlalchemy.orm import sessionmaker
  
  Base = declarative_base()
  
  class User(Base):
      __tablename__ = 'users'
      id = Column(Integer, primary_key=True)
      name = Column(String(250), nullable=False)
  
  class Server(Base):
      __tablename__ = 'servers'
      id = Column(Integer, primary_key=True)
      name = Column(String(250), nullable=False)
      owner = Column(Integer, ForeignKey('users.id'))
  
  class Role(Base):
      __tablename__ = 'roles'
      id = Column(Integer, primary_key=True)
      name = Column(String(250), nullable=False)
      server = Column(Integer, ForeignKey('servers.id'))
  
  class Channel(Base):
      __tablename__ = 'channels'
      id = Column(Integer, primary_key=True)
      name = Column(String(250), nullable=False)
      server = Column(Integer, ForeignKey('servers.id'))
      squelch = Column(Boolean, nullable=False)
  
  class CommandClass(Base):
      __tablename__ = 'commandclasses'
      id = Column(Integer, primary_key=True)
      name = Column(String(250), nullable=False)
  
  class Command(Base):
      __tablename__ = 'commands'
      id = Column(Integer, primary_key=True)
      name = Column(String(250), nullable=False)
      squelch = Column(Boolean, nullable=False)
      command_class = Column(Integer, ForeignKey('commandclasses.id'))
  
  class RoleCommandAccess(Base):
  	__tablename__ = 'rolecommands'
  	id = Column(Integer, primary_key=True)
  	role = Column(Integer, ForeignKey('roles.id'))
  	command = Column(Integer, ForeignKey('commands.id'))
  	squelch = Column(Boolean, nullable=False)
  
  class RoleCommandClassAccess(Base):
  	__tablename__ = 'rolecommandclasses'
  	id = Column(Integer, primary_key=True)
  	role = Column(Integer, ForeignKey('roles.id'))
  	command_class = Column(Integer, ForeignKey('commandclasses.id'))
  	squelch = Column(Boolean, nullable=False)
  
  class UserCommandAccess(Base):
  	__tablename__ = 'usercommands'
  	id = Column(Integer, primary_key=True)
  	user = Column(Integer, ForeignKey('users.id'))
  	command = Column(Integer, ForeignKey('commands.id'))
  	squelch = Column(Boolean, nullable=False)
  
  class UserCommandClassAccess(Base):
  	__tablename__ = 'usercommandclasses'
  	id = Column(Integer, primary_key=True)
  	user = Column(Integer, ForeignKey('users.id'))
  	command_class = Column(Integer, ForeignKey('commandclasses.id'))
  	squelch = Column(Boolean, nullable=False)
  
  
  
  # Create an engine that stores data in the local directory's
  # sqlalchemy_example.db file.
  engine = create_engine('sqlite:///susumu_takuan.db')
   
  # Create all tables in the engine. This is equivalent to "Create Table"
  # statements in raw SQL.
  Base.metadata.create_all(engine)
  
  DBSession = sessionmaker(bind=engine)
subject: Fix typo in schema declaration