tastypie查询集值

Question

我有这个tastypie资源：

class TagResource_min(ModelResource): 
    class Meta: 
      queryset=Question.objects.values('text', 'id') 

当我做到这一点我有错误：

{ 

    "error_message": "'dict' object has no attribute 'pk'", 
    "traceback": " 
     Traceback (most recent call last): 

     File \"/home/will/agora/env/lib/python3.5/site-packages/tastypie/resources.py\", line 219, in wrapper  
     response = callback(request, *args, **kwargs) 

     File \"/home/will/agora/env/lib/python3.5/site-packages/tastypie/resources.py\", line 450, in dispatch_list  
     return self.dispatch('list', request, **kwargs) 

     File \"/home/will/agora/env/lib/python3.5/site-packages/tastypie/resources.py\", line 482, in dispatch  
     response = method(request, **kwargs) 

     File \"/home/will/agora/env/lib/python3.5/site-packages/tastypie/resources.py\", line 1340, in get_list  
     for obj in to_be_serialized[self._meta.collection_name] 

     File \"/home/will/agora/env/lib/python3.5/site-packages/tastypie/resources.py\", line 1340, in <listcomp>  
     for obj in to_be_serialized[self._meta.collection_name] 

     File \"/home/will/agora/env/lib/python3.5/site-packages/tastypie/resources.py\", line 895, in full_dehydrate  
     data[field_name] = method(bundle) 

     File \"/home/will/agora/env/lib/python3.5/site-packages/tastypie/resources.py\", line 1068, in dehydrate_resource_uri  
     return self.get_resource_uri(bundle) 

     File \"/home/will/agora/env/lib/python3.5/site-packages/tastypie/resources.py\", line 819, in get_resource_uri  
     return self._build_reverse_url(url_name, kwargs=self.resource_uri_kwargs(bundle_or_obj)) 

     File \"/home/will/agora/env/lib/python3.5/site-packages/tastypie/resources.py\", line 798, in resource_uri_kwargs  
     kwargs.update(self.detail_uri_kwargs(bundle_or_obj)) 

     File \"/home/will/agora/env/lib/python3.5/site-packages/tastypie/resources.py\", line 775, 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'" 

} 

的'dict'它指的是必须在查询集获得通过Question.objects.values('text', 'id')。当我登录到外壳，并要求Question.objects.values('text', 'id')我有以下几点：

<QuerySet [{'text': 'Why does capillary action take place?', 'id': 1}, {'text': "If a human brain was connected to a fish's body, how would the humans thoughts change?", 'id': 2},... 

什么我用objects.values()做错了什么？如何使用objects.values()显示新的查询集？

EDIT当我使用Question.objects.values()它返回的dict阵列不具有该属性dict.pk。但是当我做Question.objects.all()它返回一个ModelResource类型的数组，当我呼叫ModelResource.pk时，它们都返回一个整数。

这个信息不是很有用......哈哈。因为我确信解决方案在于tastypie或django库。尽管如此，如果我能想出一种方法将pk附加在能解决我的问题的字典上。

Answer 1

values()方法返回一个返回字典而不是模型实例的查询集。模型实例具有pk属性，但字典没有。 Tastypie试图在字典中访问pk，从而导致错误。您需要使用返回给模型实例的查询集的方法。

从Django's documentation使用values()：

when you know you’re only going to need values from a small number of the available fields and you won’t need the functionality of a model instance object.

在你的情况，你确实需要模型实例对象的功能，pk属性。

我建议使用Question.objects.all()