django - 管理员中的 list_filter

Question

DECOM_CHOICES = (
    ('N', 'No'),
    ('Y', 'Yes'),
)

class Host(models.Model):
    hostname = models.CharField(max_length=36, unique=True)
    decommissioned = models.CharField(max_length=1, choices=DECOM_CHOICES, default='N')
    ip_address = models.IPAddressField()
    def __unicode__(self):
        return self.hostname

class HostAdmin(admin.ModelAdmin):
    fieldsets = [
        ('Host Info', {'fields': ['hostname','decommissioned','ip_address']}),
    list_display = ('hostname', 'ip_address', 'decommissioned')
    list_filter = ('decommissioned')

现在有什么方法可以让我将退役过滤器默认设置为 'N' 而不是 'All'？

Answer 1

我通过在将请求对象传递给 changelist_view() 之前修改请求对象中的 GET 数据来实现这一点。不优雅，但它有效。

class MyModelAdmin(admin.ModelAdmin):    
    def changelist_view(self, request, extra_context=None):
        if not request.GET.has_key('decommissioned__exact'):
            q = request.GET.copy()
            q['decommissioned__exact'] = 'N'
            request.GET = q
            request.META['QUERY_STRING'] = request.GET.urlencode()
        return super(MyModelAdmin,self).changelist_view(request, extra_context=extra_context)

注意:我没有在这里尝试过这个确切的代码，但你应该明白了。