Question

我在尝试返回GET请求中的汇总数据时遇到了麻烦-我正在使用django和tastypie。我可以在Django shell中生成所需的内容：

X.objects.using（“ myDB”）。values（“ some_name”）。annotate（Avg（“ number”））

这是我对GET请求的响应所需要的，但是在好吃的地方，它不起作用...

这是我的模特：

class X(models.Model):
some_name = models.CharField(max_length=128, blank=True, null=True)
other_name = models.CharField(max_length=128, blank=True, null=True)
another_name = models.CharField(max_length=255, blank=True, null=True)
number = models.IntegerField()

class Meta:
    managed = False
    db_table = 'some_table'

这里的资源：

class XResource(ModelResource):

class Meta:
    queryset = X.objects.using("myDB").values("some_name").annotate(Avg("number"))
    resource_name = 'myResource'

我正在尝试获得如下响应：

 {'meta': {'limit': 20, 'next': None, 'offset': 0, 'previous': None, 'total_count': 5}, 'objects': [{"some_name": "name_1", "number__avg": 100}, {"some_name": "name_2", "number__avg": 200}, {"some_name": "name_3", "number__avg": 300}, {"some_name": "name_4", "number__avg": 400}, {"some_name": "name_5", "number__avg": 500}]}

但是我遇到了这个错误：

{
"error_message": "'dict' object has no attribute 'pk'",
"traceback": "Traceback (most recent call last):\n\n  File \"C:\\django\\master\\lib\\site-packages\\tastypie\\resources.py\", line 227, in wrapper\n    response = callback(request, *args, **kwargs)\n\n  File \"C:\\django\\master\\lib\\site-packages\\tastypie\\resources.py\", line 467, in dispatch_list\n    return self.dispatch('list', request, **kwargs)\n\n  File \"C:\\django\\master\\lib\\site-packages\\tastypie\\resources.py\", line 499, in dispatch\n    response = method(request, **kwargs)\n\n  File \"C:\\django\\master\\lib\\site-packages\\tastypie\\resources.py\", line 1364, in get_list\n    for obj in to_be_serialized[self._meta.collection_name]\n\n  File \"C:\\django\\master\\lib\\site-packages\\tastypie\\resources.py\", line 1364, in <listcomp>\n    for obj in to_be_serialized[self._meta.collection_name]\n\n  File \"C:\\django\\master\\lib\\site-packages\\tastypie\\resources.py\", line 918, in full_dehydrate\n    data[field_name] = method(bundle)\n\n  File \"C:\\django\\master\\lib\\site-packages\\tastypie\\resources.py\", line 1092, in dehydrate_resource_uri\n    return self.get_resource_uri(bundle)\n\n  File \"C:\\django\\master\\lib\\site-packages\\tastypie\\resources.py\", line 836, in get_resource_uri\n    return self._build_reverse_url(url_name, kwargs=self.resource_uri_kwargs(bundle_or_obj))\n\n  File \"C:\\django\\master\\lib\\site-packages\\tastypie\\resources.py\", line 815, in resource_uri_kwargs\n    kwargs.update(self.detail_uri_kwargs(bundle_or_obj))\n\n  File \"C:\\django\\master\\lib\\site-packages\\tastypie\\resources.py\", line 792, in detail_uri_kwargs\n    kwargs[self._meta.detail_uri_name] = getattr(bundle_or_obj, self._meta.detail_uri_name)\n\nAttributeError: 'dict' object has no attribute 'pk'\n"

}

我尝试使用itertools.groupby解决问题-但我没有得到任何好的结果。

任何建议/提示将不胜感激。

谢谢！

如何使用Tastypie返回聚合数据

0 个答案: