django admin如何限制selectbox值

Question

模型:

class Store(models.Model):
  name = models.CharField(max_length = 20)
  class Admin:
    pass
  def __unicode__(self):
    return self.name

class Stock(Store):
  products = models.ManyToManyField(Product)
  class Admin:
    pass
  def __unicode__(self):
    return self.name

class Product(models.Model):
  name = models.CharField(max_length = 128, unique = True)
  parent = models.ForeignKey('self', null = True, blank = True, related_name='children')
  (...)
  def __unicode__(self):
    return self.name

mptt.register(Product, order_insertion_by = ['name'])

admin.py:

from bar.drinkstore.models import Store, Stock

from django.contrib import admin

admin.site.register(Store)
admin.site.register(Stock)

现在,当我查看管理站点时,我可以从列表中选择任何产品.但我想有一个有限的选择 - 只留下.在mptt类中有功能:

is_leaf_node() - 如果模型实例是叶节点(它没有子节点),则返回True,否则返回False.

但我不知道如何连接它

我正在尝试创建一个子类:在admin.py中:

  from bar.drinkstore.models import Store, Stock

  from django.contrib import admin

  admin.site.register(Store)

  class StockAdmin(admin.ModelAdmin):
    def queryset(self, request):
      return super(StockAdmin, self).queryset(request).filter(ihavenoideawhatfilter)

    admin.site.register(Stock, StockAdmin)

但我不确定它是否正确,以及过滤器设置.

UPD:这是一种错误的方式.StockAdmin类中的queryset生成股票列表.但我需要过滤产品清单"库存" - 仍然不知道如何.

Answer 1

编辑:完全更新了这个

所以查询集最后还可以,但你需要在Stock页面选择框中过滤产品(我猜？).您可以为Stock ModelAdmin定义自定义表单.

class StockForm(ModelForm):
    products = forms.ModelChoiceField(queryset=Products.objects.filter(lft=F('rght')-1))
    class Meta:
        model = Stock

class StockAdmin(admin.ModelAdmin):
    form = StockForm