Django 如何在 createsuperuser 中实例化表

我有两个表Employee和Sector，Employee表的外键是Sector表的扇区代码(SectorCode)属性.Employee表继承自AbstractBaseUser类. 我想用命令python manage.py createsuperuser创建一个超级用户. 我收到一个错误:ValueError: Cannot assign "'Code1'": "Employee.sectorCode" must be a "Sector" instance. (我在Sector表中增加了第NameSector1; Code1行)

我输入以下值:

λ python manage.py createsuperuser
registrationNumber: 001
Name: TestN1
FirstName: TestFN1
sectorCode: Code1
Password: ...

Error ...

如何在对话框中实例化Sector类？

models.py个

from django.db import models
from django.contrib.auth.models import AbstractBaseUser, BaseUserManager

class MyUserManager(BaseUserManager):
    
    def create_user(self, registrationNumber, firstName, name, sectorCode, password=None):
        if not firstName: raise ValueError("firstName required")
        if not name: raise ValueError("name required")
        if not registrationNumber: raise ValueError("registrationNumber required")
        if not sectorCode: raise ValueError("sectorCode required")
        
        user=self.model(firstName = firstName, name = name, registrationNumber = registrationNumber, sectorCode = sectorCode)
        user.set_password(password); user.save()
        return user
    
    def create_superuser(self, firstName, name, registrationNumber, sectorCode, password=None):
        user=self.create_user(firstName = firstName, name = name, registrationNumber = registrationNumber, sectorCode = sectorCode, password = password)
        user.is_admin=True; user.is_superuser=True
        user.save()
        return user

class Sector(models.Model):
    nameSector = models.CharField(verbose_name = "nameSector", max_length=50)
    sectorCode = models.CharField(verbose_name = "sectorCode", max_length=3, primary_key=True)
    
    class Meta: db_table = "Sector"
    
class Employee(AbstractBaseUser):
    firstName = models.CharField(verbose_name = "firstName", max_length=20)
    name = models.CharField(verbose_name = "name", max_length=20)
    registrationNumber = models.CharField(verbose_name="registrationNumber", max_length=20, primary_key=True)
    sectorCode = models.ForeignKey(Sector, on_delete=models.CASCADE)
    
    USERNAME_FIELD="registrationNumber"
    REQUIRED_FIELDS = ["name", "firstName", "sectorCode"]
    objects = MyUserManager()
    class Meta: db_table = "Employee"