从管理员中删除关联的OneToOneField模型中的SQL数据

Question

我有一个模型通过OneToOneField引用另一个模型，因此当您使用Django的内置delete_selected管理员操作时，关联模型的数据不会被删除。我想编写一个自定义管理操作来删除相关模型中的数据。

这里是我的模型：

class Party(models.Model): 
    TYPE_CHOICES=(
     ('P','Person'), 
     ('O','Organization') 
    ) 
    partyType = models.CharField(max_length=1, choices=TYPE_CHOICES) 
    name = models.CharField(max_length=100) 
    comment = models.CharField(max_length=500,blank=True) 
    accessIdCrossRef=models.IntegerField(blank=True, null=True) 
    mailingLists = models.ManyToManyField(MailingList) 
    inMainList=models.BooleanField(default=False) 
    inSubList=models.BooleanField(default=False) 

    class Meta: 
     db_table='party' 
     ordering=['name',] 

    def __unicode__(self): 
     return self.name 

class Person(models.Model): 
    party = models.OneToOneField(Party, editable=False) 
    firstName=models.CharField(max_length=60) 
    lastName=models.CharField(max_length=60) 
    ... 


    def save(self): 
     if None == self.party : 
      print 'Creating party for person' 
      p = Party() 
      p.partyType = 'P' 
      p.save() 
      self.party = p 

     # Get address to set party name used in list 
     city="" 
     state="" 
     postalCode="" 
     try: 
      partyAddress = PartyPostalAddress.objects.get(party=self.party) 
      address = partyAddress.postalAddress 
      city=address.city 
      state=address.state 
      postalCode=address.postalCode 
     except PartyPostalAddress.DoesNotExist: 
      pass 

     self.party.name = '%s, %s - %s, %s %s' %(self.lastName, self.firstName, city, state, postalCode) 
     self.party.save() 
     super(Person,self).save() 

我的假设是在我的模型是这样写：

def delete(self): 
    self.party.delete() 
    self.delete() 

而像这样的管理措施：

class PersonAdmin(admin.ModelAdmin): 
    list_display = ('lastName','firstName') 
    search_fields = ('firstName', 'lastName') 
     actions=['really_delete_selected'] 

    def get_actions(self, request): 
    actions = super(PersonAdmin, self).get_actions(request) 
    del actions['delete_selected'] 
    return actions 

    def really_delete_selected(self, request, queryset): 
    for obj in queryset: 
     obj.delete() 

    if queryset.count() == 1: 
     message_bit = "1 person was" 
    else: 
     message_bit = "%s people were" % queryset.count() 
    self.message_user(request, "%s successfully deleted." % message_bit) 
    really_delete_selected.short_description = "Delete selected entries" 

那删除person.party和大部分人，但因为人的party OneToOneFi而抛出错误现在是空的。具体的错误是：

“/ admin/common/person/ AssertionError由于它的id属性设置为None，所以无法删除对象。”

任何想法？ This,this和this问题是相关的，但其中只有一个使用了OneToOneField，他错误地做了这个。

Answer 1

清理干净了！

我的模型：

class Party(models.Model): 
    name = models.CharField(max_length=100) 
    ... 

class Person(models.Model): 
    party = models.OneToOneField(Party, editable=False) 
    firstName=models.CharField(max_length=60) 
    lastName=models.CharField(max_length=60) 

    def delete(self): 
     d = self.party.id 
     Party.objects.get(id__exact=d).delete() 

我的管理员：

class PersonAdmin(admin.ModelAdmin): 
    actions=['really_delete_selected'] 

    def get_actions(self, request): 
     actions = super(PersonAdmin, self).get_actions(request) 
     del actions['delete_selected'] 
     return actions 

    def really_delete_selected(self, request, queryset): 
     for obj in queryset: 
      obj.delete() 

     if queryset.count() == 1: 
      message_bit = "1 person was" 
     else: 
      message_bit = "%s people were" % queryset.count() 

     self.message_user(request, "%s successfully deleted." % message_bit) 
     really_delete_selected.short_description = "Delete selected entries" 
     ... 

Answer 2

我感觉它应该像切换两个删除序列一样简单（除非您已经尝试过）。由于该人与聚会相关联，因此一旦删除了人，就无法访​​问聚会。因此你应该这样做

person.party.delete() 
person.delete()