环路通过两个查询集，而在Django突出差异

Question

我有一个模型类定义如下：

class Vehicle(models.Model): 
    stock_number = models.CharField(max_length=6) 
    vin = models.CharField(max_length=17) 
    year = models.PositiveSmallIntegerField() 
    manufacturer = models.CharField(max_length=15) 
    manufacturer_popularity = models.CharField(max_length=1, blank=True, null=True) 
    model = models.CharField(max_length=20) 
    series = models.CharField(max_length=35, blank=True, null=True) 
    exterior_colour = models.CharField(max_length=25) 
    interior_colour = models.CharField(max_length=25) 
    interior_type = models.CharField(max_length=25) 
    doors = models.PositiveSmallIntegerField() 
    passengers = models.PositiveSmallIntegerField() 
    body_style = models.CharField(max_length=30) 
    transmission = models.CharField(max_length=50) 
    fuel_type = models.CharField(max_length=50) 
    engine_capacity = models.DecimalField(max_digits=2, decimal_places=1) 
    cylinders = models.PositiveSmallIntegerField() 
    drive_train = models.CharField(max_length=50) 

我想要做的就是基于上面的类来查询两个数据库，然后在模板中显示的数据同时以红色显示每个配对车辆条目之间的差异。该查询位并不是主要的问题，我想，因为我需要这样的东西：

set1 = Vehicle.objects.all() 
set2 = Vehicle.objects.using('other_db').all() 

但我怎么能已经配对，并显示被处理？我希望有人能让我看到这里的光芒。

更新1

vehicles = [] 
for v1 in set1: 
    for v2 in set2: 
     if v1['stock_number'] == v2['stock_number']: 
      vehicle1 = vehicle2 = {} 
      vehicle1['vehicle_1'] = v1 
      vehicle2['vehicle_2'] = v2 
      vehicles.append(vehicle1) 
      vehicles.append(vehicle2) 
     else: 
      vehicle1 = vehicle2 = {} 
      vehicle1['vehicle_1'] = v1 
      vehicle2['vehicle_2'] = {} 
      vehicles.append(vehicle1) 
      vehicles.append(vehicle2) 

Answer 1

from itertools import izip 

for obj1, obj2 in izip(set1, set2): 
    for field in obj1._meta.fields: 
     if field.value_from_object(obj1) == field.value_from_object(obj2): 
      print 'Same value', field.value_from_object(obj1) 
     else: 
      print 'Obj1 has', field.value_from_object(obj1) 
      print 'Obj2 has', field.value_from_object(obj2)