gradebook_part

class BaseUser(BaseModel):
    first_name = CharField()
    last_name = CharField()
    username = CharField(unique=True)
    password = CharField()

    class Meta:
        order_by = ('last_name',)


class Teacher(BaseUser):
    specialization = ForeignKeyField(Subject, related_name='specializations')


class Student(BaseUser):
    group = CharField()