訂購模型

Question

我有以下的模型 -

class VideoCredit(models.Model): 
    video = models.ForeignKey(VideoInfo) 
    profile = models.ForeignKey('UserProfile', blank=True, null=True) 
    normalized_name = models.CharField(max_length=100) 

我要訂購通過他們是否有一個配置文件，然後通過noramlized_name，例如學分 -

# for the following entries 

id video    profile   normalized_name 
1 Terminator  Terry Gilliam  Terry Gilliam 
2 Terminator  James Cameron  James Cameron 
3 Dracula   Null    Bela Lugosi 

# it would order as: [James Cameron, Terry Gilliam, Bela Lugosi] 

我試着做ordering=['-profile_full_name', 'normalized_name']，但它會先排序，但按字母順序排列。如果我改爲profile_full_name，它會在開始時返回沒有配置文件（NULL字段）的那些。我將如何做到這一點？謝謝。

更新：我下來到這一點，這是很好的工作：

recent_activity=[] 
for object in RecentActivity.objects.select_related.all()[:50]: 
    if object.event_type == 2: 
     credits_yes_profile = object.content_object.videocredit_set.exclude(profile=None).order_by('profile__full_name') 
     credits_no_profile = object.content_object.videocredit_set.filter(profile=None).order_by('normalized_name') 
     sorted_credits = list(credits_yes_profile) + list(credits_no_profile) 
     recent_activity.append((object, sorted_credits)) 
    else: 
     recent_activity.append((object, '')) 

Answer 1

recent_activity=[] 
for object in RecentActivity.objects.select_related.all()[:50]: 
    if object.event_type == 2: 
     credits_yes_profile = object.content_object.videocredit_set.exclude(profile=None).order_by('profile__full_name') 
     credits_no_profile = object.content_object.videocredit_set.filter(profile=None).order_by('normalized_name') 
     sorted_credits = list(credits_yes_profile) + list(credits_no_profile) 
     recent_activity.append((object, sorted_credits)) 
    else: 
     recent_activity.append((object, ''))