出现以下错误无法分配"u'167 '"："部门.组织"必须是"组织"示例。
我已尝试各种方法发送组织ID，但均未成功：

Request Method: POST
Request URL:    http://127.0.0.1:8081/profiles/api/createorganisation/
Django Version: 1.8.14
Exception Type: ValueError
Exception Value:    
Cannot assign "u'167'": "Department.organization" must be a "Organization" instance.

Exception Location: /usr/local/lib/python2.7/site-packages/django/db/models/fields/related.py in __set__, line 639

这是模型

class Department(models.Model):
"""
Make department codes selectable and stuff
"""
organization = models.ForeignKey(Organization, related_name="departments")
name = models.CharField(max_length=200)
slug = models.SlugField(max_length=200, unique=True, editable=False)
users = models.ManyToManyField("CustomUser", related_name="departments", blank=True)
enter code here

序列化程序类

class DepartmentCreateSerializer(serializers.ModelSerializer):
organization = serializers.CharField()
name = serializers.CharField()
slug = serializers.CharField()

class Meta:
    model = Department
    fields = ('pk','organization','name','slug')

这是我的密码

org = Organization.objects.get(slug="tata5").id

    department = { 
        "organization":org,
        "name" : "finance1",
        "slug" : "finance1" ,
     }  
    
  
    logging.warning(department)
    
   
    instance = DepartmentCreateSerializer(data=department)
    instance.organization = org
    instance.is_valid(raise_exception=True)
    instance.save()
    

    # createDepartment.is_valid()
    # createDepartment.save()
    
    return Response(instance, status=status.HTTP_200_OK)