Stack Overflow上的一些人已经讨论了这个问题，但是没有答案对我有帮助。

这是post_2

post_2 = Post(title = 'Dark Knight',content='Batman was amazing in the Dark Knight',author_id=User.id)

这是models.py的内容

from django.db import models
from django.utils import timezone
from django.contrib.auth.models import User

# Create your models here.
class Post(models.Model):
    title = models.CharField(max_length=100)
    content = models.TextField()
    date_posted = models.DateTimeField(default=timezone.now)
    author = models.ForeignKey(User,on_delete=models.CASCADE)

    def __str__(self):
        return self.title 

当我这样做

>>> post_2.save()

我收到错误

 TypeError: int() argument must be a string,a bytes-like object or a number,not 'DeferredAttribute'

这是完整的错误

Traceback (most recent call last):
  File "<console>",line 1,in <module>
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\base.py",line 741,in save
    force_update=force_update,update_fields=update_fields)
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\base.py",line 779,in save_base
    force_update,using,update_fields,File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\base.py",line 870,in _save_table
    result = self._do_insert(cls._base_manager,fields,update_pk,raw)
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\base.py",line 908,in _do_insert
    using=using,raw=raw)
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\manager.py",line 82,in manager_method
    return getattr(self.get_queryset(),name)(*args,**kwargs)
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\query.py",line 1186,in _insert
    return query.get_compiler(using=using).execute_sql(return_id)
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\sql\compiler.py",line 1334,in execute_sql
    for sql,params in self.as_sql():
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\sql\compiler.py",line 1278,in as_sql
    for obj in self.query.objs
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\sql\compiler.py",in <listcomp>
    for obj in self.query.objs
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\sql\compiler.py",line 1277,in <listcomp>
    [self.prepare_value(field,self.pre_save_val(field,obj)) for field in fields]
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\sql\compiler.py",line 1218,in prepare_value
    value = field.get_db_prep_save(value,connection=self.connection)
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\fields\related.py",line 937,in get_db_prep_save
    return self.target_field.get_db_prep_save(value,connection=connection)
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\fields\__init__.py",line 789,in get_db_prep_save
    return self.get_db_prep_value(value,connection=connection,prepared=False)
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\fields\__init__.py",line 959,in get_db_prep_value
    value = self.get_prep_value(value)
  File "C:\Users\HP\project2_env\lib\site-packages\django\db\models\fields\__init__.py",line 968,in get_prep_value
    return int(value)
TypeError: int() argument must be a string,not 'DeferredAttribute'