如何克服美味派中的空查询集克隆问题？

Question

我正在尝试创建 REST API，但遇到以下问题：

/tastypie/resources.py"，第 1475 行，在 get_object_list
返回 self._meta.queryset._clone()
AttributeError：“NoneType”对象没有属性“_clone”

---

class ManageResource(ModelResource):

   class Meta(ModelResource.Meta):
       resource_name = 'resourceStatus'
       detail_allowed_methods = ['get']
       always_return_data = True
       default_format = 'application/json'

    def base_urls(self):
       return [
           url(r"^(?P<resource_name>%s)%s$" % (self._meta.resource_name, 
               trailing_slash()), self.wrap_view('dispatch_list'), 
               name="api_dispatch_list"),
           url(r"^(?P<resource_name>%s)/(?P<request_id>[\w\d_.-]+)%s$"
            % (self._meta.resource_name, trailing_slash()),
            self.wrap_view('dispatch_detail'), name="api_dispatch_detail"),
        ]

    def get_detail(self, request, **kwargs):
        id = int(kwargs["request_id"])
        return self._get_response(request, self.obj_get(request=request,id=id))

    @obj_wrapper
    def obj_get(self, request, id):
       result = Helper().status(id=id)    
       return {"info":{"start_time":result.get("start_time"),\
            "end_time":result.get("end_time"),\
            "status":result.get("status"),\
            "messages":result.get("messages")}}

我没有在元类中设置查询集，因为我从文件或某种静态资源中提取数据。

Answer 1

将queryset 字段添加到资源的Meta。如果您没有使用标准的QuerySet，请覆盖get_object_list 方法。

Answer 2

我是这样实现的：

class SomeFakedResource(Resource):
    # list out your fields as usual
    test_quantity = fields.IntegerField(attribute='test_quantity')

    class Meta:
        resource_name = 'some_faked'
        allowed_methods = ['get']
        include_resource_uri = False

    def _calculate_test_quantity(self):
        # here's where I put the real work of calculating the field
        return 1

    def obj_get_list(self, bundle, **kwargs):
        return self.get_object_list(bundle.request)

    def get_object_list(self, request):
        self.test_quantity = self._calculate_test_quantity()
        return [self]