title: Django TastyPie NotFound("Invalid resource lookup data provided (mismatched type).")
body: <p>I'm getting the following error when posting data to my resource which I can't get to the bottom of. Any help would be appreciated.</p>
  
  <pre><code>Traceback (most recent call last):
  
    File \"/Library/Python/2.7/site-packages/tastypie/resources.py\", line 202, in wrapper
      response = callback(request, *args, **kwargs)
  
    File \"/Library/Python/2.7/site-packages/tastypie/resources.py\", line 439, in dispatch_list
      return self.dispatch('list', request, **kwargs)
  
    File \"/Library/Python/2.7/site-packages/tastypie/resources.py\", line 471, in dispatch
      response = method(request, **kwargs)
  
    File \"/Library/Python/2.7/site-packages/tastypie/resources.py\", line 1313, in post_list
      updated_bundle = self.obj_create(bundle, **self.remove_api_resource_names(kwargs))
  
    File \"/Users/andrewpryde/Sites/gnats.dev/gNats_site/gNats_site/api/resources.py\", line 132, in obj_create
      bundle = super(BlogPostResource, self).obj_create(bundle, **kwargs)
  
    File \"/Library/Python/2.7/site-packages/tastypie/resources.py\", line 2078, in obj_create
      bundle = self.full_hydrate(bundle)
  
    File \"/Library/Python/2.7/site-packages/tastypie/resources.py\", line 881, in full_hydrate
      value = field_object.hydrate(bundle)
  
    File \"/Library/Python/2.7/site-packages/tastypie/fields.py\", line 737, in hydrate
      return self.build_related_resource(value, request=bundle.request)
  
    File \"/Library/Python/2.7/site-packages/tastypie/fields.py\", line 653, in build_related_resource
      return self.resource_from_uri(self.fk_resource, value, **kwargs)
  
    File \"/Library/Python/2.7/site-packages/tastypie/fields.py\", line 573, in resource_from_uri
      obj = fk_resource.get_via_uri(uri, request=request)
  
    File \"/Library/Python/2.7/site-packages/tastypie/resources.py\", line 810, in get_via_uri
      return self.obj_get(bundle=bundle, **self.remove_api_resource_names(kwargs))
  
    File \"/Library/Python/2.7/site-packages/tastypie/resources.py\", line 2066, in obj_get
      raise NotFound(\"Invalid resource lookup data provided (mismatched type).\")
  
  NotFound: Invalid resource lookup data provided (mismatched type).
  </code></pre>
  
  <p>Using this curl command</p>
  
  <pre><code>curl -u "a:test" --dump-header - -H "Content-Type: application/json" -X POST --data '{"body": "This will prbbly be my last post.", "pub_date": "2011-05-22T00:46:38", "title": "Another Post"}' http://127.0.0.1:8000/api/v1/posts/
  </code></pre>
  
  <p>My resource is as follows</p>
  
  <pre><code>class BlogPostResource(ModelResource):
  """
      used for getting and creating posts
  """
  author = fields.ToOneField(CreateUserResource, 'author', null=True, blank=True)
  
  class Meta:
      queryset = BlogPost.objects.all()
      resource_name = 'posts'
  
      authentication = BasicAuthentication()
      authorization = CustomAuthorization()
  
      allowed_methods = ['get', 'post']
  
      always_return_data = True
  
  # def obj_create(self, bundle, **kwargs):
  #     try:
  #         print bundle.obj
  #         # if bundle.obj.author.id != bundle.request.user.id:
  #             # raise IntegrityError('Cannot add a post for another user')
  #         bundle = super(BlogPostResource, self).obj_create(bundle, **kwargs)
  #     except IntegrityError as detail:
  #         raise BadRequest(detail)
  #     return bundle
  
  def hydrate(self, bundle):
      """
          Adds author field from user as only allowed to create own posts
      """
      bundle.data['author'] = '/api/v1/user/%d/' % int(bundle.request.user.id)
      return bundle
  </code></pre>