Inline中对外键进行排序

在多对多关系中，用Inline插入外键关系，有时在输入时就需要对外键进行排序

可以重载formfield_for_foreignkey 或 formfield_for_manytomany..

如：

def formfield_for_foreignkey(self, db_field, request, **kwargs):
        kwargs["queryset"] = Database.objects.order_by('type')
        return super(DatabaseInline, self).formfield_for_foreignkey(db_field, request, **kwargs)

 具体查看下面链接

 https://docs.djangoproject.com/en/1.3/ref/contrib/admin/#django.contrib.admin.ModelAdmin.formfield_for_foreignkey