我正在尝试通过Multipart / Form-Data表单和Tastypie API上传文件,并遇到了一些问题:
我的模特:
class Client(models.Model):
account = models.ForeignKey(Account)
client_image = models.FileField(upload_to=client_image_path, default="/assets/img/default-user-image.png", blank=True, null=True)
client_image_thumb = models.FileField(upload_to=client_image_thumb_path, default="/assets/img/default-user-image.png", blank=True, null=True)
我正在使用Tastypie问题#42中概述的自定义反序列化方法:
class MultipartResource(object):
def deserialize(self, request, data, format=None):
if not format:
format = request.META.get('CONTENT_TYPE', 'application/json')
if format == 'application/x-www-form-urlencoded':
return request.POST
if format.startswith('multipart'):
data = request.POST.copy()
data.update(request.FILES)
return data
return super(MultipartResource, self).deserialize(request, data, format)
def put_detail(self, request, **kwargs):
if request.META.get('CONTENT_TYPE').startswith('multipart') and \
not hasattr(request, '_body'):
request._body = ''
return super(MultipartResource, self).put_detail(request, **kwargs)
这是我对应的ModelResource:
class ClientResource(MultipartResource, ModelResource):
account = fields.ForeignKey(AccountResource, 'account')
class Meta():
queryset = Client.objects.all()
always_return_data = True
resource_name = 'account/clients/client-info'
authorization = AccountLevelAuthorization()
list_allowed_methods = ['get','post','put','delete','patch']
detail_allowed_methods = ['get', 'post', 'put', 'delete','patch']
authentication = ApiKeyAuthentication()
filtering = {
'username': ALL,
}
如果我使用内容类型application / JSON进行POST并且不包含client_image字段,它将成功创建一个新的客户端对象。这表明模型/资源正在按预期工作。
但是,当我尝试使用Multipart / Form-Data内容类型时,我可以看到它通过此有效负载正确地通过我的反序列化器:
------WebKitFormBoundaryp0Q7Q9djlsvVGwbb
Content-Disposition: form-data; name="{%0D%0A%22account%22"
"/api/v1/account/account-info/21/",
------WebKitFormBoundaryp0Q7Q9djlsvVGwbb
Content-Disposition: form-data; name="client_image"; filename="donavan.jpg"
Content-Type: image/jpeg
------WebKitFormBoundaryp0Q7Q9djlsvVGwbb--
我在调试时也看到了这个QueryDict,它正确地显示了InMemoryUploadedFile:
<QueryDict: {u'client_image': [<InMemoryUploadedFile: donavan.jpg (image/jpeg)>], u'{%0D%0A%22account%22': [u'"/api/v1/account/account-info/21/"']}>
但我一直收到这个错误:
{error_message:“”traceback:“Traceback(最近一次调用最后一次): 文件 “/Users/stevewirig/Documents/www/vu/venv/lib/python2.7/site-packages/tastypie/resources.py” 第202行,在包装器响应中=回调(request,* args,** kwargs) 文件 “/Users/stevewirig/Documents/www/vu/venv/lib/python2.7/site-packages/tastypie/resources.py” 第440行,在dispatch_list中返回self.dispatch('list',request, ** kwargs)文件“/Users/stevewirig/Documents/www/vu/venv/lib/python2.7/site-packages/tastypie/resources.py”, 第472行,在调度响应=方法(请求,** kwargs)文件 “/Users/stevewirig/Documents/www/vu/venv/lib/python2.7/site-packages/tastypie/resources.py” 第1328行,在post_list updated_bundle = self.obj_create(bundle, ** self.remove_api_resource_names(kwargs))文件“/Users/stevewirig/Documents/www/vu/venv/lib/python2.7/site-packages/tastypie/resources.py”, 第2104行,在obj_create bundle = self.full_hydrate(bundle)文件中 “/Users/stevewirig/Documents/www/vu/venv/lib/python2.7/site-packages/tastypie/resources.py” 第890行,在full_hydrate值= field_object.hydrate(包)文件中 “/Users/stevewirig/Documents/www/vu/venv/lib/python2.7/site-packages/tastypie/fields.py” 732行,水合物值= super(ToOneField,self)。水合物(束) 文件 “/Users/stevewirig/Documents/www/vu/venv/lib/python2.7/site-packages/tastypie/fields.py” 第165行,在hydrate elif self.attribute和getattr(bundle.obj, self.attribute,无):文件 “/Users/stevewirig/Documents/www/vu/venv/lib/python2.7/site-packages/django/db/models/fields/related.py” 第343行,在获取提升self.field.rel.to.DoesNotExist DoesNotExist “}
有什么想法可以打破吗?提前致谢!
答案 0 :(得分:0)
当我在没有提供必要字段的情况下发布数据时发生这种情况。发布时必须提供那些不能为null的字段。
答案 1 :(得分:0)
按以下方式初始化序列化器:
serializer = Serializer(formats=['json'])