Django Tastypie annoate/groupby返回一个“；pk"；错误

当使用django的annotate获取“groupby”时，它返回没有PK的对象是有意义的。因为按字段分组没有意义，所以将其他一些字段相加，得到单行PK ID

我想我在tastypie做得不对。但是我从文档中看不到一种进行分组的方法

因此，我在自定义资源类中添加了一个queryparam“groupby”。在“apply_filters”中，我让tastypie做它通常的事情，然后我介入并应用django“groupby”：

这将返回对象的查询集，其中只有“type”字段和正确汇总的字段

我从tastypie得到的错误是：

    Traceback (most recent call last):  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 228, in wrapper  
    response = callback(request, *args, **kwargs)  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 468, in dispatch_list  
    return self.dispatch('list', request, **kwargs)  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 500, in dispatch  
    response = method(request, **kwargs)  
  File "/srv/attrib-backend/backend/api/utils.py", line 69, in get_list  
    for obj in to_be_serialized[self._meta.collection_name]  
  File "/srv/attrib-backend/backend/api/utils.py", line 69, in <listcomp>  
    for obj in to_be_serialized[self._meta.collection_name]  
  File "/srv/attrib-backend/backend/api/utils.py", line 114, in full_dehydrate  
    data[field_name] = method(bundle)  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 1093, in dehydrate_resource_uri  
    return self.get_resource_uri(bundle)  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 837, in get_resource_uri  
    return self._build_reverse_url(url_name, kwargs=self.resource_uri_kwargs(bundle_or_obj))  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 816, in resource_uri_kwargs  
    kwargs.update(self.detail_uri_kwargs(bundle_or_obj))  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 793, in detail_uri_kwargs  
    kwargs[self._meta.detail_uri_name] = getattr(bundle_or_obj, self._meta.detail_uri_name)  
AttributeError: 'dict' object has no attribute 'pk'  

---

谢谢你的帮助和指点

TastyPie需要一个模型对象，而不是源于

.values（..）

的字典。是的，我可以看到这一点。但是我正在尝试使用django的groupby——Tastypie如何允许sql等效于“groupby”？您好，您找到解决方案了吗？我也在寻找解决办法。我需要在使用Tastype的api中使用groupby。TastyPie需要一个模型对象，而不是源于

.values（…）

的字典。是的，我可以看到这一点。但是我正在尝试使用django的groupby——Tastypie如何允许sql等效于“groupby”？您好，您找到解决方案了吗？我也在寻找解决办法。我需要在使用tastypi的api中使用groupby

    Traceback (most recent call last):  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 228, in wrapper  
    response = callback(request, *args, **kwargs)  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 468, in dispatch_list  
    return self.dispatch('list', request, **kwargs)  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 500, in dispatch  
    response = method(request, **kwargs)  
  File "/srv/attrib-backend/backend/api/utils.py", line 69, in get_list  
    for obj in to_be_serialized[self._meta.collection_name]  
  File "/srv/attrib-backend/backend/api/utils.py", line 69, in <listcomp>  
    for obj in to_be_serialized[self._meta.collection_name]  
  File "/srv/attrib-backend/backend/api/utils.py", line 114, in full_dehydrate  
    data[field_name] = method(bundle)  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 1093, in dehydrate_resource_uri  
    return self.get_resource_uri(bundle)  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 837, in get_resource_uri  
    return self._build_reverse_url(url_name, kwargs=self.resource_uri_kwargs(bundle_or_obj))  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 816, in resource_uri_kwargs  
    kwargs.update(self.detail_uri_kwargs(bundle_or_obj))  
  File "/usr/local/lib/python3.6/dist-packages/tastypie/resources.py", line 793, in detail_uri_kwargs  
    kwargs[self._meta.detail_uri_name] = getattr(bundle_or_obj, self._meta.detail_uri_name)  
AttributeError: 'dict' object has no attribute 'pk'  

"The object 
{
    type': 'My Type X', 
    'field_one__sum': 4,
    'field_two__sum': Decimal('1045.76'),
}
has an empty attribute 'type' and doesn't allow a default or null value."