Python 基于自然密钥错误的django序列化

我有一个django模型，使用自然关键点：

class AcademicProgramsManager(models.Manager):
    def get_by_natural_key(self, acad_program_id, program_title, required_credits):
        return self.get(acad_program_id = acad_program_id, program_title = program_title, required_credits = required_credits)

class AcademicPrograms(models.Model):

    objects = AcademicProgramsManager()
    acad_program_id = models.IntegerField(primary_key=True)
    acad_program_category = models.ForeignKey(AcademicProgramCategories)
    acad_program_type = models.ForeignKey(AcademicProgramTypes)
    acad_program_code = models.CharField(max_length=25)
    program_title = models.CharField(max_length=64)
    required_credits = models.IntegerField()
    min_gpa = models.FloatField()
    description = models.CharField(max_length=1000)

    def natural_key(self):
    return (self.acad_program_id, self.program_title, self.required_credits)

class StudentAcademicPrograms(models.Model):
    student = models.ForeignKey(Students)
    academic_program = models.ForeignKey(AcademicPrograms)
    credits_completed = models.IntegerField()
    academic_program_gpa = models.FloatField()
    primary_program = models.BooleanField()

    def __str__(self):
    return self.credits_completed

当我试图用以下命令序列化

StudentAcademicPrograms

时，它抛出了一个错误

>>> with open("datafile.json","w") as out:...     
        serialize("json", StudentAcademicPrograms.objects.all(), indent=2, use_natural_foreign_keys=True, use_natural_primary_keys=True)
    ... 
    Traceback (most recent call last):
      File "<console>", line 2, in <module>
      File "/home/abhishek/projects/texascompletes/local/lib/python2.7/site-packages/django/core/serializers/__init__.py", line 122, in serialize
        s.serialize(queryset, **options)
      File "/home/abhishek/projects/texascompletes/local/lib/python2.7/site-packages/django/core/serializers/base.py", line 58, in serialize
        self.end_object(obj)
      File "/home/abhishek/projects/texascompletes/local/lib/python2.7/site-packages/django/core/serializers/json.py", line 52, in end_object
        cls=DjangoJSONEncoder, **self.json_kwargs)
      File "/usr/lib/python2.7/json/__init__.py", line 186, in dump
        default=default, sort_keys=sort_keys, **kw).iterencode(obj)
    TypeError: __init__() got an unexpected keyword argument 'use_natural_foreign_keys'

打开（“datafile.json”，“w”）作为输出：。。。 序列化（“json”，StudentAcademicPrograms.objects.all（），缩进=2，使用\u natural\u foreign\u keys=True，使用\u natural\u primary\u keys=True） ... 回溯（最近一次呼叫最后一次）： 文件“”，第2行，在 文件“/home/abhishek/projects/texascompletes/local/lib/python2.7/site packages/django/core/serializers/_init__.py”，第122行，序列化 s、 序列化（查询集，**选项） 文件“/home/abhishek/projects/texascompletes/local/lib/python2.7/site packages/django/core/serializers/base.py”，第58行，序列化 self.end_对象（obj） 文件“/home/abhishek/projects/texascompletes/local/lib/python2.7/site packages/django/core/serializers/json.py”，第52行，在end_对象中 cls=DjangoJSONEncoder，**self.json_-kwargs） 文件“/usr/lib/python2.7/json/_init__.py”，第186行，在转储文件中 默认值=默认值，排序键=排序键，**kw）。iterencode（obj） TypeError:\uuuuu init\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu 我哪里出了问题？

根据Django 1.7版本中的

使用自然键

被“拆分”为

使用自然键

和

使用自然键

，目前该版本并不稳定

---

您可以使用或使用

使用自然密钥
关键字。
hmm。。我正在看开发版本的文档。