我试图创建一个资源（观察）有0到无限的意见。 我被困在了以下错误：
"error": "The model '<Observation: Observation object>' has an empty attribute 'comments' and doesn't allow a null value."
此外，加入空= true要评论=（...）将导致空注释即使应该有问题意见的评论对象。
我也试图将其更改为完整路径瞎搞与CommentResource2路径。
我一直在关注从Tastypie文档的反向关系指南：
反“关系”
这里是我的模型：
class Observation(ObsModel):
taxon_node = models.ForeignKey(TaxonNode, related_name = 'observation_taxon_node', null = True)
substrate = models.ForeignKey(TaxonNode, related_name = 'observation_substrate', null = True, blank=True)
source = models.CharField(max_length=255, blank=True)
sample = models.ForeignKey(Sample)
remarks = models.TextField(blank = True)
exact_time = models.DateTimeField(null=True)
individual_count = models.IntegerField(null = True)
is_verified = models.NullBooleanField(null = True)
verified_by = models.ForeignKey(User, null = True)
verified_time = models.DateTimeField('time verified', null = True)
class Meta():
app_label = 'observation'
class Comment(models.Model):
observation = models.ForeignKey(Observation)
comment = models.TextField()
created_time = models.DateTimeField('time created', auto_now_add=True, editable=False)
class Meta:
app_label = 'observation_moderate'
和资源：
class ObservationResource2(ModelResource):
comments = fields.ToManyField('apps.api.CommentResource2', 'comments')
class Meta:
queryset = Observation.objects.filter(is_verified=False)
authentication = SessionAuthentication()
authorization = DjangoAuthorization()
resource_name = 'observation'
class CommentResource2(ModelResource):
observation = fields.ToOneField(ObservationResource2, 'observation')
class Meta:
queryset = Comment.objects.all()
resource_name = 'comments'
authentication = SessionAuthentication()
authorization = DjangoAuthorization()
