Question

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, using, 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", line 1278, 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, a bytes-like object or a number, not 'DeferredAttribute'

Answer 1

您需要一个User实例。

author_id=User.id

对id类的User字段的要求。您需要更多类似的东西：

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

Answer 2

谢谢大家的帮助，当我为.first()赋值时，我并没有放user

user = User.objects.filter(username='Batman').first()

解决TypeError：int（）参数必须是字符串，类似字节的对象或数字，而不是'DeferredAttribute'

2 个答案: