我的第一个问题:
所以我正在使用tastypie来为我的应用程序提供api。
我希望能够使用tastypie渲染json,然后将其包含在django视图中,以便我可以引导我的应用程序的数据。
这里有django tastypie食谱中的一个例子:http://django-tastypie.readthedocs.org/en/latest/cookbook.html#using-your-resource-in-regular-views
问题在于我无法使其工作,我尝试过从简单到复杂的变体,我只是无法得到它,这里有一些代码用于我的模型:
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,
}
和我的观点索引:
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ChatMessageResource的json 而且我还想要一个renderAll()函数来为json中的所有(或过滤)ChatMessageResources添加它。
我想使用tastypie internals,我知道我可以自己序列化,但这不是重点..
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,我已经尝试了几个小时。
那么请问,如何在django视图中使用tastypie通过代码获取ONE / ALL资源作为JSON!
如果不清楚或我需要澄清,请问,谢谢
我真正想做的是能够获取我创建的API网址返回的JSON,但是从代码中获取,而不是通过访问网址...所以如果我有/api/v1/messages/?chat_session=14
返回一个列表消息,我希望能够通过代码执行相同的操作(而不是通过curl或其他东西获取URL)。
注意: 来自https://github.com/toastdriven/django-tastypie/blob/master/tastypie/resources.py
的ModelResource.obj_get的定义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).")
答案 0 :(得分:10)
所以我在这里找到了解决方案,问题在于url解析...我需要添加
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(会话在这里),以便它工作(不要问为什么!)
所以这是我的renderDetail和renderList的工作解决方案:
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
以下是一个示例用法:
cmr = ChatMessageResource()
dataOne= cmr.renderDetail("723")
dataAll = cmr.renderList({'limit':'0','chat_session':cur_sess.pk})
答案 1 :(得分:2)
https://github.com/toastdriven/django-tastypie/issues/962
我发现 obj_get 方法需要捆绑的请求对象。请参阅链接。
def user_detail(request, username):
ur = UserResource()
# Add this request bundle to the obj_get() method as shown.
req_bundle = ur.build_bundle(request=request)
user = ur.obj_get(req_bundle, username=username)
....
答案 2 :(得分:0)
你的问题似乎在这里:
data = self.obj_get(None,pk=pkval)
obj_get
的参数应该是可以直接传递给标准get
的kwargs。 None
不应该在那里。