假设我们有两个对象:
class Author(models.Model):
name = models.CharField(length=50)
class Book(models.Model):
author = models.ForeignKey(Author)
is_bestseller = models.BooleanField()
在 BookAdmin 中,如果我们指定
list_filter = ('author', 'is_bestseller')
为您提供的“作者”选择将始终是数据库中的所有作者,无论他们是否写过畅销书。
我希望我的过滤器的选择受到当前选择的限制。我尝试使用 admin.SimpleListFilter 以一般方式执行此操作, 然而,我被困住了,因为:
model_admin.get_queryset()
返回未过滤的查询集(即所有对象,而不仅仅是当前被用户过滤掉的对象)。
如何获取 BookAdmin 的过滤查询集?
编辑:为了更好地说明问题,这是我的代码:
class ForeignFieldFilter(admin.SimpleListFilter):
field = None
def lookups(self, request, model_admin):
queryset = model_admin.get_queryset(request).select_related(self.field)
# ^^^ !!! Returns UNFILTERED queryset - it's not affected by other filters
field_ids = queryset.values_list(self.field, flat=True)
for field_value in self.model..objects.filter(id__in=field_ids):
yield (field_value.pk, str(field_value))
def queryset(self, request, queryset):
value = self.value()
# Check that any value was passed, if not, return unmodified queryset
if not value:
return queryset
return queryset.filter({'{0}__pk'.format(self.field): value})
def foreign_field_filter_factory(field, model, title=None):
title = title or (field[:1].upper() + field[1:])
return type(
"ForeignFieldFilter_{0}".format(field),
(ForeignFieldFilter,),
{
'field': field,
'title': title,
'parameter_name': field,
'model': model
})
最佳答案
对于图书管理
class AuthorBestSeller(admin.SimpleListFilter):
title = 'Best selling authors'
parameter_name = 'bestseller'
def queryset(self, request, queryset):
if self.value():
return queryset.filter(author_id=self.value())
else:
return queryset
def lookups(self, request, model_admin):
qs = model_admin.get_queryset(request)
query_attrs = dict([(param, val) for param, val in request.GET.items()])
qs = qs.filter(**query_attrs)
for book in qs.filter(is_bestseller=1): # or might be able to use yeild here
ret.append((book.author_id, book.author))
return ret
编辑:嗯...这也不太有效。它只会为您提供畅销书作者的列表。
然后添加到 BookAdmin
list_filter = (AuthorBestSeller, )
关于django - 如何访问 django admin.SimpleListFilter 中过滤后的查询集,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28257979/