如何正确使用序列化程序. SlugRelatedField？
我的代码看起来像这样，但它得到了一个错误...
这里有一个完整的错误：
django.core.exceptions.FieldError:无法将关键字'department_name'解析为字段。选项包括：工卡，创建时间，部门，部门标识，性别，标识，姓名，职位，职位标识，更新时间
型号代码：

class Employee(models.Model):
    GENDER_CHOICES = (
        ('Male', 'Male'),
        ('Female', 'Female'),
    )
    name = models.CharField(max_length=100)
    badge = models.CharField(max_length=6, unique=True)
    gender = models.CharField(max_length=20, choices=GENDER_CHOICES)
    department = models.ForeignKey(
        Department, on_delete=models.CASCADE, null=True)
    position = models.ForeignKey(
        Position, on_delete=models.CASCADE, null=True)
    updated_at = models.DateTimeField(auto_now=True)
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return f'{self.name} - {self.badge}'

串行器代码

from rest_framework import serializers
from .models import Employee

class EmployeeSerializer(serializers.ModelSerializer):
    department = serializers.SlugRelatedField(
        slug_field='department_name', queryset=Employee.objects.all())
    # position = serializers.SlugRelatedField(
    #     slug_field='position_name', queryset=Employee.objects.all()

    class Meta:
        model = Employee
        fields = '__all__'