old_contents: from database import Base
  from flask_security import UserMixin, RoleMixin
  from sqlalchemy import create_engine
  from sqlalchemy.orm import relationship, backref
  from sqlalchemy import Boolean, DateTime, Column, Integer, \
                         String, ForeignKey
  
  class RolesUsers(Base):
      __tablename__ = 'roles_users'
      id = Column(Integer(), primary_key=True)
      user_id = Column('user_id', Integer(), ForeignKey('user.id'))
      role_id = Column('role_id', Integer(), ForeignKey('role.id'))
  
  class Role(Base, RoleMixin):
      __tablename__ = 'role'
      id = Column(Integer(), primary_key=True)
      name = Column(String(80), unique=True)
      description = Column(String(255))
  
  class User(Base, UserMixin):
      __tablename__ = 'user'
      id = Column(Integer, primary_key=True)
      email = Column(String(255), unique=True)
      username = Column(String(255))
      password = Column(String(255))
      last_login_at = Column(DateTime())
      current_login_at = Column(DateTime())
      last_login_ip = Column(String(100))
      current_login_ip = Column(String(100))
      login_count = Column(Integer)
      active = Column(Boolean())
      confirmed_at = Column(DateTime())
      roles = relationship('Role', secondary='roles_users', backref=backref('users', lazy='dynamic'))
  
new_contents: from database import Base
  from flask_security import UserMixin, RoleMixin
  from sqlalchemy import create_engine
  from sqlalchemy.orm import relationship, backref
  from sqlalchemy import Boolean, DateTime, Column, Integer, \
                         String, ForeignKey, Enum, Float
  
  class RolesUsers(Base):
      __tablename__ = 'roles_users'
      id = Column(Integer(), primary_key=True)
      user_id = Column('user_id', Integer(), ForeignKey('user.id'))
      role_id = Column('role_id', Integer(), ForeignKey('role.id'))
  
  class Role(Base, RoleMixin):
      __tablename__ = 'role'
      id = Column(Integer(), primary_key=True)
      name = Column(String(80), unique=True)
      description = Column(String(255))
  
  class User(Base, UserMixin):
      __tablename__ = 'user'
      id = Column(Integer, primary_key=True)
      email = Column(String(255), unique=True)
      username = Column(String(255))
      password = Column(String(255))
      last_login_at = Column(DateTime())
      current_login_at = Column(DateTime())
      last_login_ip = Column(String(100))
      current_login_ip = Column(String(100))
      login_count = Column(Integer)
      active = Column(Boolean())
      confirmed_at = Column(DateTime())
      roles = relationship('Role', secondary='roles_users', backref=backref('users', lazy='dynamic'))
  
  Categories = 'Spirit Liqueur Vermouth Bitters Syrup Juice Mixer Wine Beer Dry Ice'.split()
  class Ingredient(Base):
      __tablename__  = 'ingredient'
      Category   = Column(Enum(*Categories))
      Type       = Column(String(), primary_key=True)
      Bottle     = Column(String(), primary_key=True)
      In_Stock   = Column(Boolean(), default=True)
      Proof      = Column(Float())
      Size_mL    = Column(Float())
      Price_Paid = Column(Float())
  
subject: Add ingredient model to models