我认为这是一个基本错误，但我正在尝试进行一些测试，但现在无法迁移内容。我已正常python manage.py makemigrations，但在使用'migrate'时，会显示消息错误：
C:\P3\P3\urls.py:21: RemovedInDjango110Warning: Support for string view arguments to url() is deprecated and will be removed in Django 1.10 (got quizzy.views.primeraprox). Pass the callable instead.
url(r'^primaprox/', 'quizzy.views.primeraprox'),
Operations to perform:
Apply all migrations: contenttypes, admin, sessions, quizzy, auth
Running migrations:
Rendering model states... DONE
Applying quizzy.0002_auto_20160313_1718...Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\core\management\__init__.py", line 353, in execute_from_command_line
utility.execute()
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\core\management\__init__.py", line 345, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\core\management\base.py", line 348, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\core\management\base.py", line 399, in execute
output = self.handle(*args, **options)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\core\management\commands\migrate.py", line 200, in handle
executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\migrations\executor.py", line 92, in migrate
self._migrate_all_forwards(plan, full_plan, fake=fake, fake_initial=fake_initial)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\migrations\executor.py", line 121, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\migrations\executor.py", line 198, in apply_migration
state = migration.apply(state, schema_editor)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\migrations\migration.py", line 123, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\migrations\operations\fields.py", line 62, in database_forwards
field,
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\backends\base\schema.py", line 382, in add_field
definition, params = self.column_sql(model, field, include_default=True)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\backends\base\schema.py", line 145, in column_sql
default_value = self.effective_default(field)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\backends\base\schema.py", line 210, in effective_default
default = field.get_db_prep_save(default, self.connection)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\models\fields\related.py", line 912, in get_db_prep_save
return self.target_field.get_db_prep_save(value, connection=connection)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\models\fields\__init__.py", line 728, in get_db_prep_save
prepared=False)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\models\fields\__init__.py", line 968, in get_db_prep_value
value = self.get_prep_value(value)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\models\fields\__init__.py", line 976, in get_prep_value
return int(value)
TypeError: int() argument must be a string, a bytes-like object or a number, not 'datetime.datetime'
此外，网址有什么问题？
我的models.py看起来像这样：
from django.db import models
from django.utils import timezone
class Questions(models.Model):
content = models.CharField(max_length=200)
pub_date = models.DateTimeField('datetime field', default=True)
def __str__(self):
return self.content
class Answer(models.Model):
answer_text = models.CharField(max_length=200)
first_field = models.CharField(max_length=150)
question = models.ManyToManyField(Questions)
def __str__(self):
return self.answer_text
我只是希望能够进行迁移，并且无法弄清楚为什么Django会提供有关'datetime.datetime'的错误。我真的很感激任何帮助。谢谢。
编辑1 ：我更改了pub_date字段。然后'makemigrations'并返回：
C:\P3>python manage.py makemigrations
C:\P3\P3\urls.py:21: RemovedInDjango110Warning: Support for string view arguments to url() is deprecated and will be removed in Django 1.10 (got quizzy.views.primeraprox). Pass the callable instead.
url(r'^primaprox/', 'quizzy.views.primeraprox'),
System check identified some issues:
WARNINGS:
quizzy.Questions.pub_date: (fields.W161) Fixed default value provided.
HINT: It seems you set a fixed date / time / datetime value as default for this field. This may not be what you want. If you want to have the current date as default, use `django.utils.timezone.now`
Migrations for 'quizzy':
0012_auto_20160313_1810.py:
- Alter field pub_date on questions
然后当我再次运行'migrate'时，错误消息是相同的。怎么了？谢谢
编辑2 ：如果您要求上述“制作迁移”的文字是以下文字：
C:\P3>python manage.py makemigrations
C:\P3\P3\urls.py:21: RemovedInDjango110Warning: Support for string view arguments to url() is deprecated and will be removed in Django 1.10 (got quizzy.views.primeraprox). Pass the callable instead.
url(r'', 'quizzy.views.primeraprox'),
You are trying to add a non-nullable field 'quiz' to questions without a default; we can't do that (the database needs something to populate existing rows).
Please select a fix:
1) Provide a one-off default now (will be set on all existing rows)
2) Quit, and let me add a default in models.py
Select an option: 1
Please enter the default value now, as valid Python
The datetime and django.utils.timezone modules are available, so you can do e.g. timezone.now()
>>> timezone.now()
Migrations for 'quizzy':
0002_auto_20160313_1718.py:
- Create model Quiz
- Add field quiz to questions
这属于我所做的一些更改，但现在我已将其删除，可能会出现错误。
编辑3 ：将pub_date设置为（auto_now = True），完整迁移是这样的：
C:\P3>python manage.py migrate
C:\P3\P3\urls.py:21: RemovedInDjango110Warning: Support for string view arguments to url() is deprecated and will be removed in Django 1.10 (got quizzy.views.primeraprox). Pass the callable instead.
url(r'^primaprox/', 'quizzy.views.primeraprox'),
Operations to perform:
Apply all migrations: quizzy, contenttypes, sessions, auth, admin
Running migrations:
Rendering model states... DONE
Applying quizzy.0002_auto_20160313_1718...Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\core\management\__init__.py", line 353, in execute_from_command_line
utility.execute()
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\core\management\__init__.py", line 345, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\core\management\base.py", line 348, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\core\management\base.py", line 399, in execute
output = self.handle(*args, **options)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\core\management\commands\migrate.py", line 200, in handle
executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\migrations\executor.py", line 92, in migrate
self._migrate_all_forwards(plan, full_plan, fake=fake, fake_initial=fake_initial)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\migrations\executor.py", line 121, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\migrations\executor.py", line 198, in apply_migration
state = migration.apply(state, schema_editor)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\migrations\migration.py", line 123, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\migrations\operations\fields.py", line 62, in database_forwards
field,
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\backends\base\schema.py", line 382, in add_field
definition, params = self.column_sql(model, field, include_default=True)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\backends\base\schema.py", line 145, in column_sql
default_value = self.effective_default(field)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\backends\base\schema.py", line 210, in effective_default
default = field.get_db_prep_save(default, self.connection)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\models\fields\related.py", line 912, in get_db_prep_save
return self.target_field.get_db_prep_save(value, connection=connection)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\models\fields\__init__.py", line 728, in get_db_prep_save
prepared=False)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\models\fields\__init__.py", line 968, in get_db_prep_value
value = self.get_prep_value(value)
File "C:\Python\lib\site-packages\django-1.9.1-py3.5.egg\django\db\models\fields\__init__.py", line 976, in get_prep_value
return int(value)
TypeError: int() argument must be a string, a bytes-like object or a number, not 'datetime.datetime'
编辑4（迁移）：迁移文件包含：
class Migration(migrations.Migration):
dependencies = [
('quizzy', '0001_initial'),
]
operations = [
migrations.CreateModel(
name='Quiz',
fields=[
('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('name', models.TextField(default='true', max_length=200)),
],
),
migrations.AddField(
model_name='questions',
name='quiz',
field=models.ForeignKey(default=datetime.datetime(2016, 3, 13, 16, 18, 27, 23857, tzinfo=utc), on_delete=django.db.models.deletion.CASCADE, to='quizzy.Quiz'),
preserve_default=False,
),
]
答案 0 :(得分：0)
您的pubdate默认值为布尔值，您应该为其指定日期时间或自动显示
pub_date = models.DateTimeField(auto_now=True)
pub_date = models.DateTimeField(default=timezone.now)
您遇到的实际问题是您将外键的默认设置为日期时间，您可以将其设置为某个ID或允许空值
migrations.AddField(
model_name='questions',
name='quiz',
field=models.ForeignKey(default=1, on_delete=django.db.models.deletion.CASCADE, to='quizzy.Quiz'), # or null=True
preserve_default=False,
),