Django rest框架:如何根据特定字段(= not id)获取外键

from django.db import models
from rest_framework import serializers

class ForeignKeyModel(models.Model):
    field1 = models.CharField(max_length=100)
    # 定义外键字段
    foreign_key = models.ForeignKey('OtherModel', on_delete=models.CASCADE)

class OtherModel(models.Model):
    field2 = models.CharField(max_length=100)

class ForeignKeySerializer(serializers.ModelSerializer):
    class Meta:
        model = ForeignKeyModel
        fields = '__all__'

from rest_framework import generics, viewsets

class ForeignKeyList(generics.ListCreateAPIView):
    queryset = ForeignKeyModel.objects.all()
    serializer_class = ForeignKeySerializer

class ForeignKeyDetail(generics.RetrieveUpdateDestroyAPIView):
    queryset = ForeignKeyModel.objects.all()
    serializer_class = ForeignKeySerializer

class ForeignKeyViewSet(viewsets.ModelViewSet):
    queryset = ForeignKeyModel.objects.all()
    serializer_class = ForeignKeySerializer

from django.urls import include, path
from rest_framework import routers

router = routers.DefaultRouter()
router.register('foreignkeys', ForeignKeyViewSet)

urlpatterns = [
    path('api/', include(router.urls)),
]