tastypie 查询集值未显示

Question

我有这个 tastypie 资源：

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

当我这样做时出现错误：

{

    "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'"

}

它所指的'dict'一定是Question.objects.values('text', 'id')得到的queryset。当我登录 shell 并询问 Question.objects.values('text', 'id') 时，我有以下信息：

<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},...

我使用 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() 时，它 return 是一个 dict 的数组，它没有属性 dict.pk.但是当我做 Question.objects.all() 时，它 return 是一个 ModelResource 类型的数组，当我调用 ModelResource.pk.

时，它都是 return 一个整数

这些信息并没有多大帮助...哈哈。因为我确信解决方案就在 tastypie 或 django 库中。尽管如此，如果我能想出一种方法在 dict 上附加一个 pk 就可以解决我的问题。

Answer 1

values()方法returns一个查询集，returns字典而不是模型实例。模型实例具有 pk 属性，但字典没有。 Tastypie 正在尝试访问字典中的 pk，从而给出错误。您需要使用一种方法 returns 提供模型实例的查询集。

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.

在您的情况下，您确实需要模型实例对象的功能，pk 属性。

我建议使用 Question.objects.all()

tastypie 查询集值未显示

tastypie queryset values is not being displayed

python

django

tastypie