同一个表但是不同列的多个外键获取models.object

Question

我有两个模型，卡车和订单，他们有一个关系。

from django.db import models
from django.contrib.auth.models import User

class Truck (models.Model):

        truck_number = models.CharField(max_length=200);
        condition = models.CharField(max_length=20);
        insurance = models.CharField(max_length=20);
        gps_tracking = models.CharField(max_length=20);
        owner_name = models.CharField(max_length=20);
        id_number = models.IntegerField();
        telephone_number=models.IntegerField();
        driver_name=models.CharField(max_length=30, default=None);
        driver_id_number=models.IntegerField();
        driver_phone_number=models.IntegerField();
        driving_license=models.CharField(max_length=20);
        good_conduct=models.CharField(max_length=30);
        def __str__(self):
            truck_number = self.truck_number
            return truck_number



class Order(models.Model):

    truck_number= models.Foreignkey(Truck,related_name='relation_truck')
    date= models.DateField()
    product=models.CharField(max_length=30)
    depot = models.CharField(max_length=10)
    volume = models.CharField(max_length=30, blank=True)
    volume_delivered = models.CharField(max_length=30, blank=True)
    driver_name=models.ForeignKey(Truck, max_length=30,default=None)
    driver_id_number=models.ForeignKey(Truck, related_name='relation_id')
    driver_phone_number=models.ForeignKey(Truck, related_name='relation_tel')
    order_status = models.CharField(max_length=50, blank=True)
    def __str__(self):
        truck_number = self.truck_number
        return truck_number

所有带外键的字段都是获取整个对象Truck而不是外键的特定值。就像我想要truck_number一样只能从表卡车而不是整个Truck对象中取出truck_number。我怎样才能获得外键值而不是整个对象。

Answer 1

根据您的评论，您需要以下内容：

Truck.objects.values_list('id', 'truck_number', 'driver_name', 'driver_id_number', 'driver_phone_number')

Answer 2

我设法做到这一点，因为webbyfox说：

class OrderAdmin(admin.ModelAdmin):

    fields = ('truck_number','date','product','depot','driver_name','driver_id_number','driver_phone_number')
    form = OrderForm
    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        if db_field.name == "truck_number":
            kwargs["queryset"] = Truck.objects.values_list( 'truck_number', flat=True)
        elif db_field.name == "driver_name":
            kwargs["queryset"] = Truck.objects.values_list( 'driver_name', flat=True)
        elif db_field.name == "driver_id_number":
            kwargs["queryset"] = Truck.objects.values_list( 'driver_id_number', flat=True)
        elif db_field.name == "driver_phone_number":
            kwargs["queryset"] = Truck.objects.values_list( 'driver_phone_number', flat=True)
        return super().formfield_for_foreignkey(db_field, request, **kwargs)

admin.site.register(Order, OrderAdmin)