从django list_filter中删除重复项

问题描述：

我在django管理员中使用相关对象中的字段上的列表过滤器。

I'm using a list filter in django admin on a field in a related object.

class A(models.Model):
   #..
   pass
class B(models.Model):
   fk = models.ForeignKey(A)
   val models.CharField(max_length=1)

在 A 的管理员中，我试图 list_filter on B__val ，但结果是重复 A c $ c列出每个 B 满足过滤器值。

In the admin for A, I'm trying to list_filter on B__val, but the result is duplicate A's listed for each B satisfying the filter value.

是否有一种简单的方法来截取查询结果以删除重复项？

Is there an easy way to intercept the query result to remove the duplicates?

答

管理员确实尝试添加 .distinct（），但是由于某种原因错过了（必须是错误

The admin source indeed tries to add .distinct(), but misses it on this for some reason (must be a bug?).

我得到以下所需的行为：

I get the behaviour I'm looking for with the following:

class NoDuplicates(ChangeList):
    def __init__(self, *args):
        super(NoDuplicates,self).__init__(*args)

    def get_query_set(self):
        return super(NoDuplicates,self).get_query_set().distinct()

class AAdmin(admin.ModelAdmin):
    def get_changelist(self, request, **kwargs):
        return NoDuplicates

    list_filter = [ B__val ]

从django list_filter中删除重复项

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