django - Trying to add like functionality to my Photo Resource using Tastypie -

i have website people can photographs. created photoresource , photolikeresource (code below). able add photo, want return number of total likes photo , whether current user likes already. tried returning information in hydrate function (commented out in code, broke api calls). how can accomplish this?

class photoresource(modelresource): tags = fields.manytomanyfield(tagresource, 'tags', null=true, blank=true) primary_image = fields.foreignkey(imageresource, 'primary_image', null=true, blank=true, full=true) user = fields.foreignkey(userresource, 'user')  class meta:     queryset = photo.objects.all()     resource_name = 'photos'     authorization = djangoauthorization()     allowed_methods = ['get', 'post', 'put']     filtering = {         'primary_image': all,         'featured':     }  # dehyrdate below breaks photo_like call # def dehydrate(self, bundle): #     num_likes = photolike.objects.filter(photo=bundle.obj).count() #     bundle.data['num_likes'] = num_likes #     user_like = photolike.objects.filter(user=bundle.request.user, photo = bundle.obj).exists() #     bundle.data['user_like'] = user_like #     return bundle.data   class photolikeresource(modelresource): photo = fields.foreignkey(photoresource, 'photo', null=true, blank=true)  class meta:     queryset = photolike.objects.all()     authorization = djangoauthorization()     resource_name = 'photo_like'     always_return_data = true  def obj_create(self, bundle, **kwargs):     return super(photolikeresource, self).obj_create(bundle, user=bundle.request.user) 

thank time , :)

that should return bundle , not return bundle.data.

it's post traceback.