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<p>我的第一个问题是:</p>
<p>所以我用tastypie为我的应用程序开发了api。</p>
<p>我希望能够使用tastype呈现json,然后将其包含在django视图中,这样我就可以引导我的应用程序的数据。</p>
<p>django tastypie食谱中有这样一个例子:<a href="http://django-tastypie.readthedocs.org/en/latest/cookbook.html#using-your-resource-in-regular-views">http://django-tastypie.readthedocs.org/en/latest/cookbook.html#using-your-resource-in-regular-views</a></p>
<p>问题是,我不能让它工作,我尝试了从简单到复杂的变体,但我就是弄不到,这里是我的模型的一些代码:</p>
<pre><code>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="")
[...]
</code></pre>
<p>以及我的资源:</p>
<pre><code>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,
}
</code></pre>
<p>以及我的视图索引:</p>
<pre><code>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))
</code></pre>
<p>我想要的是我的renderOne()函数给我一个ChatMessageResource的json
另外,我希望renderAll()函数将所有(或筛选的)ChatMessageResources都用json表示。</p>
<p>我想使用tastypie内部,我知道我可以自己序列化,但这不是重点。。</p>
<p>现在的错误是:</p>
<pre><code>NoReverseMatch at /live/
Reverse for 'api_dispatch_detail' with arguments '()' and keyword arguments '{'pk': 14L, 'resource_name': 'session'}' not found.
</code></pre>
<p>我快疯了,我已经试了好几个小时了。</p>
<p>所以,请注意,如何在django视图中使用tastype通过代码获得一个/所有资源作为JSON!</p>
<p>如果不清楚或者我需要澄清,请直接问,谢谢</p>
<p>我真正想做的是能够通过我创建的API url返回JSON,但不是通过访问url,而是通过代码。。因此,如果我有返回消息列表的<code>/api/v1/messages/?chat_session=14</code>,我希望能够通过代码(而不是通过curl或其他东西获取url)来完成同样的任务。</p>
<p>注:
从<a href="https://github.com/toastdriven/django-tastypie/blob/master/tastypie/resources.py">https://github.com/toastdriven/django-tastypie/blob/master/tastypie/resources.py</a>获取ModelResource.obj的定义</p>
<pre><code>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).")
</code></pre>