sqlalchemy-many examples

The following is a user management system database design

Many relationship implement user roles

 

# 多对多 SysUser -> Role
sys_user_role = Table('sys_user_role', Base.metadata,
                      Column('sys_user_id', ForeignKey('sys_user.id', ondelete='CASCADE'), primary_key=True),
                      Column('role_id', ForeignKey('role.id', ondelete='CASCADE'), primary_key=True))


# 系统用户
class SysUser(Base):
    __tablename__= ' Sys_user ' 

    # ID 
    ID = the Column (the UUID, primary_key = True, default = the lambda : STR (uuid.uuid4 ()), UNIQUE = False)
     # username 
    username = the Column (String (80), UNIQUE = False)
     # name 
    name = Column (String (80), UNIQUE = False) 

    # password 
    password = Column (String (80), UNIQUE = False)
     # login token 
    token = Column (String (80), UNIQUE = True)
     # login ip 
    ip = Column (String (80), UNIQUE = False)
     # login time
    login_time = Column(DateTime(), unique=False)
    # 尝试 登录时间
    try_time = Column(DateTime(), unique=False)
    # 尝试 登录次数
    try_count = Column(Integer, unique=False)

    # 多对多 SysUser -> Role
    # role_list = relationship('Role', secondary=sys_user_role, back_populates='sys_user_list', cascade='delete, delete-orphan', passive_deletes=True)

    def __init__(self, username, name):
        self.username = username
        self.name = name


# 角色
class Role(Base):
    __tablename__ = 'role'

    # ID
    id = Column(UUID, primary_key=True, default=lambda: str(uuid.uuid4()), unique=False)
    # 名称
    name = Column(String(80), unique=False)

    # 多对多 Role -> Authority
    # authority_list = relationship('Authority', secondary=role_authority, back_populates='role_list', cascade='delete, delete-orphan', passive_deletes=True)

    # 多对多 SysUser -> Role
    sys_user_list = relationship('SysUser', secondary=sys_user_role, backref=backref("role_list"))

    def __init__(self, name):
        self.name = name