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，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'"

}

它所引用的'dict'必须是Question.objects.values('text', 'id')获取的查询集。当我登录shell并询问Question.objects.values('text', 'id')时，我有以下内容：

<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},...

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

编辑当我使用Question.objects.values()时，它会返回一个dict数组，其中没有属性dict.pk。但是当我Question.objects.all()时，它返回一个ModelResource类型的数组，当我调用ModelResource.pk时，它们都返回一个整数。

这些信息真的没有用......哈哈。因为我确信解决方案在于tastypie或django库。虽然如果我能找到一种方法来附加一个pk来解决我的问题。

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试图访问dict中的pk，从而产生错误。您需要使用返回给出模型实例的查询集的方法。

从Django's documentation使用values()：

当你知道你只需要来自少数可用字段的值时，你将不需要模型实例对象的功能。

在您的情况下，您确实需要模型实例对象pk属性的功能。

我建议使用Question.objects.all()

未显示tastypie查询集值

1 个答案: