以前我的模型'DateTimeField就像
一样启动了order_date = models.DateTimeField(default=datetime.today)
投掷
TypeError: Required argument 'year' (pos 1) not found
当我试图实例化一个空白对象时。 我用datetime.datetime.now（）修复了它。 但是现在当我尝试迁移它时显示相同的错误
TypeError: Required argument 'year' (pos 1) not found
当我在一个新的数据库中清理迁移它没有任何问题。 我不想继续制作一个新的数据库，因为我没有权限在生产中这样做。有什么方法可以解决这个问题吗？
回溯：
Running migrations:
Rendering model states... DONE
Applying xyz.0016_auto_20170728_0758...Traceback (most recent call last):
File "manage.py", line 9, in <module>
execute_from_command_line(sys.argv)
File "/Users/sayok/projects/invenv1/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
utility.execute()
File "/Users/sayok/projects/invenv1/lib/python2.7/site-packages/django/core/management/__init__.py", line 330, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/sayok/projects/invenv1/lib/python2.7/site-packages/django/core/management/base.py", line 390, in run_from_argv
self.execute(*args, **cmd_options)
File "/Users/sayok/projects/invenv1/lib/python2.7/site-packages/django/core/management/base.py", line 441, in execute
output = self.handle(*args, **options)
File "/Users/sayok/projects/invenv1/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 221, in handle
executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
File "/Users/sayok/projects/invenv1/lib/python2.7/site-packages/django/db/migrations/executor.py", line 110, in migrate
self.apply_migration(states[migration], migration, fake=fake, fake_initial=fake_initial)
File "/Users/sayok/projects/invenv1/lib/python2.7/site-packages/django/db/migrations/executor.py", line 147, in apply_migration
state = migration.apply(state, schema_editor)
File "/Users/sayok/projects/invenv1/lib/python2.7/site-packages/django/db/migrations/migration.py", line 115, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/Users/sayok/projects/invenv1/lib/python2.7/site-packages/django/db/migrations/operations/fields.py", line 201, in database_forwards
schema_editor.alter_field(from_model, from_field, to_field)
File "/Users/sayok/projects/invenv1/lib/python2.7/site-packages/django/db/backends/base/schema.py", line 484, in alter_field
old_db_params, new_db_params, strict)
File "/Users/sayok/projects/invenv1/lib/python2.7/site-packages/django/db/backends/base/schema.py", line 567, in _alter_field
old_default = self.effective_default(old_field)
File "/Users/sayok/projects/invenv1/lib/python2.7/site-packages/django/db/backends/base/schema.py", line 194, in effective_default
default = field.get_default()
File "/Users/sayok/projects/invenv1/lib/python2.7/site-packages/django/db/models/fields/__init__.py", line 794, in get_default
return self.default()
TypeError: Required argument 'year' (pos 1) not found
迁移文件
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.db import models, migrations
import datetime
class Migration(migrations.Migration):
dependencies = [
('p1', '0015_vgvjvvhvvj'),
]
operations = [
migrations.AlterField(
model_name='analyze',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 909746)),
),
migrations.AlterField(
model_name='apiplaceorder',
name='order_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 972820)),
),
migrations.AlterField(
model_name='hjjghjg',
name='order_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 980004)),
),
migrations.AlterField(
model_name='banner',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 932895)),
),
migrations.AlterField(
model_name='clusterarticle',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 975352)),
),
migrations.AlterField(
model_name='clusterlog',
name='updated_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 885144)),
),
migrations.AlterField(
model_name='customize',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 906463)),
),
migrations.AlterField(
model_name='faqtopic',
name='created_date',
migrations.AlterField(
model_name='greetingstouser',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 963740)),
),
migrations.AlterField(
model_name='kycsendemailtouser',
name='send_date',
field=models.DateField(default=datetime.date(2017, 7, 28)),
),
migrations.AlterField(
model_name='liveorder',
name='order_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 971116)),
),
migrations.AlterField(
model_name='hgjgjgjgjg',
name='last_login',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 976968)),
),
migrations.AlterField(
model_name='newsletter',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 940914)),
),
migrations.AlterField(
model_name='newslettertouser',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 942440)),
),
migrations.AlterField(
model_name='newsroom',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 944774)),
),
migrations.AlterField(
model_name='optimize',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 910911)),
),
migrations.AlterField(
model_name='order',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 910911)),
),
migrations.AlterField(
model_name='order',
name='order_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 913976)),
),
migrations.AlterField(
model_name='orderaccountgraph',
name='order_date',
field=models.DateField(default=datetime.date(2017, 7, 28)),
),
migrations.AlterField(
model_name='orderbuy',
name='order_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 918101)),
),
migrations.AlterField(
model_name='orderhold',
name='hold_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 924012)),
),
migrations.AlterField(
model_name='ordersell',
name='sell_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 921352)),
),
migrations.AlterField(
model_name='ordertrack',
name='order_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 931269)),
),
migrations.AlterField(
model_name='partner',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 904619)),
),
migrations.AlterField(
model_name='recentlyviewedcluster',
name='viewed_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 911741)),
),
migrations.AlterField(
model_name='seasongreetings',
migrations.AlterField(
model_name='seasongreetings',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 962918)),
),
migrations.AlterField(
model_name='sitesetting',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 907550)),
),
migrations.AlterField(
model_name='subscribe',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 940109)),
),
migrations.AlterField(
model_name='team',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 905406)),
),
migrations.AlterField(
model_name='testimonial',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 903870)),
),
migrations.AlterField(
model_name='user',
name='created_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 891457)),
),
migrations.AlterField(
model_name='usernotification',
name='notification_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 912805)),
),
migrations.AlterField(
model_name='vghgh',
name='application_date',
field=models.DateTimeField(default=datetime.datetime(2017, 7, 28, 7, 58, 21, 957282)),
),
]
答案 0 :(得分：1)
回溯中的这一行表明您在之前的迁移中有一个不正确的默认值。
old_default = self.effective_default(old_field)
检查应用中的旧迁移，然后查找default=datetime.datetime或default=datetime.date。这些应该是default=datetime.datetime.today或datetime.date.today。
顺便说一句，你不应该使用default=datetime.now()。 Django在您创建迁移时调用该函数，并在datetime(2017, 7, 28, 7, 58, 21)冻结它。当您运行迁移时，它将使用该日期时间，即使您从现在开始运行很多天。请改用可调用的datetime.now。
答案 1 :(得分：0)
我被@ Alasdair的建议所启发。
我做了什么来解决它： -
=＆gt;将所有默认值更新为datetime.datetime.now和datetime.date.today
=＆gt;用datetime.datetime.now和datetime.date.today
替换了我的0001_initial（与您相关的）默认值=＆GT;完成，没有迁移建议或错误。