用Django-tastypi中的OneToOneField创建对象

Question

我有两个模型：项目和专辑。他们之间只有一个单独的领域。在

相册/模型.py公司名称：

class Album(models.Model):
    title = models.CharField(_('title'), max_length=128)
    slug = models.SlugField(_('slug'), unique=True, default='main-gallery')

项目/模型.py在

^{pr2}$

如果创建了一个项目，也会为它创建一个相册。这个很好用。但当我尝试在api中使用django Tastype创建一个时，它不会起作用：

class AlbumResource(ModelResource):
    class Meta:
        queryset = Album.objects.all()
        resource_name = 'album'
        #fields = ['title','slug',]

    def dehydrate_resource_uri(self, bundle):
        return bundle.data['slug']

class ProjectResource(ModelResource):
    main_gallery = fields.OneToOneField(AlbumResource, 'main_gallery', related_name='project', full=False)
    class Meta:
        queryset = Project.objects.all()
        resource_name = 'project'
        fields = ['slug', 'title', 'main_gallery']

        authorization= Authorization()

        allowed_methods = ['get', 'post', 'put']

def obj_create(self, bundle, request=None, **kwargs):
    logger.debug("obj_create Bundle %s" % bundle)
    return super(ProjectResource, self).obj_create(bundle, request, created_by=request.user)

当ProjectAPI端点上的“GET”起作用时，当我试图在“POST”上创建一个新的Project时，我得到以下错误：

    Traceback (most recent call last):
  File "/Users/PATHvenv/lib/python2.7/site-packages/django/core/handlers/base.py", line 111, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "/Users/PATHvenv/lib/python2.7/site-packages/django/views/decorators/csrf.py", line 77, in wrapped_view
    return view_func(*args, **kwargs)
  File "/Users/PATHvenv/lib/python2.7/site-packages/tastypie/resources.py", line 192, in wrapper
    response = callback(request, *args, **kwargs)
  File "/Users/PATHvenv/lib/python2.7/site-packages/tastypie/resources.py", line 397, in dispatch_list
    return self.dispatch('list', request, **kwargs)
  File "/Users/PATHvenv/lib/python2.7/site-packages/tastypie/resources.py", line 427, in dispatch
    response = method(request, **kwargs)
  File "/Users/PATHvenv/lib/python2.7/site-packages/tastypie/resources.py", line 1165, in post_list
    updated_bundle = self.obj_create(bundle, request=request, **self.remove_api_resource_names(kwargs))
  File "/Users/PATH/path/path/apps/api/resources.py", line 70, in obj_create
    return super(ProjectResource, self).obj_create(bundle, request, created_by=request.user)
  File "/Users/PATHvenv/lib/python2.7/site-packages/tastypie/resources.py", line 1774, in obj_create
    bundle = self.full_hydrate(bundle)
  File "/Users/PATHvenv/lib/python2.7/site-packages/tastypie/resources.py", line 698, in full_hydrate
    value = field_object.hydrate(bundle)
  File "/Users/PATHvenv/lib/python2.7/site-packages/tastypie/fields.py", line 636, in hydrate
    value = super(ToOneField, self).hydrate(bundle)
  File "/Users/PATHvenv/lib/python2.7/site-packages/tastypie/fields.py", line 154, in hydrate
    elif self.attribute and getattr(bundle.obj, self.attribute, None):
  File "/Users/PATHvenv/lib/python2.7/site-packages/django/db/models/fields/related.py", line 343, in __get__
    raise self.field.rel.to.DoesNotExist
DoesNotExist

Answer 1

原因是tastype在到达pre_save接收器之前失败。根据您粘贴的回溯，它在full_hydrate中失败。这是因为默认情况下，main_gallery是必需的，而不是给定的（因为您假设它将被创建）。在

尝试将blank=True, null=True添加到

main_gallery = fields.OneToOneField(AlbumResource, 'main_gallery', related_name='project', full=False)