使用视域资源 [英] Using tastypie resource in view

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问题描述

我在这里的第一个问题:

my first question here :

所以我正在使用好吃的东西为我的应用添加api。

So I'm using tastypie to have api's for my app.

我希望能够使用tastypie来呈现json,然后将其包含在django视图中,以便我可以引导应用程序的数据。

I want to be able to use tastypie to render json and then include that in a django view so that I can bootstrap my app's data.

有一个例子在dummy的dummy食谱中: http:// django- tastypie.readthedocs.org/en/latest/cookbook.html#using-your-resource-in-regular-views

There is an example of this in django tastypie cookbook here : http://django-tastypie.readthedocs.org/en/latest/cookbook.html#using-your-resource-in-regular-views

问题是我无法为了使它起作用,我尝试了从简单到更复杂的变体,但我无法理解,这里是我的模型的一些代码:

The problem is that I CANNOT get this to work, I've tried variants from simpler to more complex and I just cant get it, here some code for my models :

class ChatMessage(models.Model):
     content = models.TextField()
     added = models.DateTimeField(auto_now_add=True)

     author = models.ForeignKey(ChatUser, related_name="messages")
     chat_session = models.ForeignKey(ChatSession, related_name="messages")
     answer_to = models.ForeignKey('self', blank=True, null=True)

     flagged = models.BooleanField(blank=True,default=False)
     mododeleted = models.BooleanField(blank=True,default=False)
     mododeleted_by = models.ForeignKey(ChatUser,blank=True,null=True,default=None)
     mododeleted_at = models.DateTimeField(blank=True,null=True,default=None)
     [...]

class ChatSession (models.Model):
    title = models.CharField(max_length=200)
    link_title = models.CharField(max_length=200)
    description = tinymce_models.HTMLField()
    date = models.DateTimeField()
    online = models.BooleanField(default=False)
    next_session = models.BooleanField(default=False)
    meps = models.ManyToManyField(ChatMep)
    uid_newsupdate = models.CharField(max_length=200,blank=True,null=True,default="")
    [...]

和我的资源:

class ChatMessageResource(MyModelResource):
    chat_session = fields.ForeignKey(ChatSessionResource, 'chat_session')

    def renderOne(self,request,pkval):
       data =  self.obj_get(None,pk=pkval)
       dbundle = self.build_bundle(obj=data,request=request)
       return self.serialize(None,self.full_dehydrate(dbundle),'application/json')

    def dehydrate(self, bundle):
        bundle.data['likes'] = bundle.obj.get_likes()
        bundle.data['likes_count'] = len(bundle.data['likes'])
        return bundle

    class Meta:
        authentication = Authentication()
        authorization = Authorization()
        queryset = ChatMessage.objects.all()
        resource_name = 'message'
        fields = ('content', 'added', 'flagged', 'mododeleted','author','answer_to','chat_session')
        filtering = {
            'chat_session': ALL_WITH_RELATIONS,
        }

和我的视图索引:

def index(request):

    cur_sess = get_current_chat_session()

    data1= ChatMessageResource().renderOne(request,723)

    return render_to_response('test.html',
                          { 
                            'all_data' : data1 
                           },
                          context_instance=RequestContext(request))

我想要的是我的renderOne()函数给我一个的json的MessageMes​​sageResource
而且我还想要一个renderAll()函数给我所有(或过滤后的) )json中的ChatMessageResources。

What I want is my renderOne() function to give me the json of ONE ChatMessageResource And also I'd like a renderAll() function to gice me ALL (or filtered) ChatMessageResources in json.

而且我想使用tastypie内部结构,我知道我可以自己对其进行序列化,但这不是重点。

And I want to use tastypie internals, I KNOW i could serialize it by myself but that's not the point..

现在错误是:

NoReverseMatch at /live/

Reverse for 'api_dispatch_detail' with arguments '()' and keyword arguments '{'pk': 14L, 'resource_name': 'session'}' not found.

我只是疯了,我已经尝试了好几个小时。

I'm just getting crazy, I've been trying for hours.

所以,如何在django视图中使用密码通过代码使用JSON获取一个/全部资源!

So please, how to get ONE/ALL resource as JSON by code using tastypie in a django view !

如果不清楚或我需要澄清一下,请问一下,谢谢

If It's not clear or I need to clarify, please just ask, thanks

我真正想要做的是能够获取我创建的API url返回的JSON,但是可以从代码中获取,而不是通过访问URL来实现。所以,如果我有 / api / v1 / messages /?chat_session = 14 ,它返回了消息列表,我希望能够

Really what I want to do is to be able to get the JSON returned by an API url I created, but from code, not by visiting the url .. So If I have /api/v1/messages/?chat_session=14 which return a list of messages, I want to be able to do the same by code (and not by fetching the url with curl or something please).

注意:
ModelResource.obj_get的定义来自https://github.com/toastdriven/django-tastypie/blob/master/tastypie/resources.py

def obj_get(self, request=None, **kwargs):
            """
    A ORM-specific implementation of ``obj_get``.

    Takes optional ``kwargs``, which are used to narrow the query to find
    the instance.
    """
            try:
                base_object_list = self.get_object_list(request).filter(**kwargs)
                object_list = self.apply_authorization_limits(request, base_object_list)
                stringified_kwargs = ', '.join(["%s=%s" % (k, v) for k, v in kwargs.items()])

                if len(object_list) <= 0:
                    raise self._meta.object_class.DoesNotExist("Couldn't find an instance of '%s' which matched '%s'." % (self._meta.object_class.__name__, stringified_kwargs))
                elif len(object_list) > 1:
                    raise MultipleObjectsReturned("More than '%s' matched '%s'." % (self._meta.object_class.__name__, stringified_kwargs))

                return object_list[0]
            except ValueError:
                raise NotFound("Invalid resource lookup data provided (mismatched type).")


推荐答案

所以我在这里在解决方案上,问题在于网址解析...我需要添加

So here I found the solution, the problem was with url resolving ... I needed to add

def get_resource_uri(self, bundle_or_obj):
   return '/api/v1/%s/%s/' % (self._meta.resource_name,bundle_or_obj.obj.id)

到相关对象(此处为会话)以使其起作用(不要问为什么!)

to the related object (session here) in order for it to work (don't ask why!)

我对renderDetail和renderList的工作解决方案:

So here is my working solution for renderDetail and renderList :

def renderDetail(self,pkval):
    request = HttpRequest()
    request.GET = {'format': 'json'}
    resp =  self.get_detail(request, pk=pkval)
    return resp.content


def renderList(self,options={}):
    request = HttpRequest()
    request.GET = {'format': 'json'}
    if len(options) > 0:
        request.GET.update(options)

    resp = self.get_list(request)
    return resp.content

这是一个示例用法:

cmr = ChatMessageResource()

dataOne= cmr.renderDetail("723")

dataAll = cmr.renderList({'limit':'0','chat_session':cur_sess.pk})

这篇关于使用视域资源的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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