TypeError: int() argument doit être une chaîne, un octets, comme objet ou un nombre, et non pas " datetime.datetime'

J'essaie d'ajouter une "created_at' pour tous mes modèles et je reçois le message d'erreur suivant...

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

Dans l'ordre, c'est mon flux de travail...

1) j'ai mis created_at = models.DateTimeField(auto_now_add=True) dans mes modèles.

2) - je exécuter python manage.py makemigrations et il affiche l'invite suivante s'affiche dans ma ligne de commande...

You are trying to add a non-nullable field 'created_at' to comment 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()

3) À ce stade, je tape dans timezone.now() sur tous les modèles et lorsque vous avez terminé avec succès crée les migrations fichier pour moi.

4) - je exécuter python manage.py migrate et obtenir le TypeError message affiché ci-dessus.

Choses que j'ai essayé...

1) la Recherche par le biais de Débordement de Pile pour des problèmes similaires (en vain)...

2) Deleteing les migrations de fichier et d'essayer d'utiliser datetime.datetime.now()

3) Deleteing les migrations de fichier et d'essayer d'utiliser la simple entier 1.

Toutes ces tentatives ont été infructueuses.

Ligne de commande complet traceback...

(env)[email protected]:~/repos/hacker_news$ python manage.py migrate
Operations to perform:
Apply all migrations: admin, auth, sessions, hackernews, contenttypes
Running migrations:
Rendering model states... DONE
Applying hackernews.0003_auto_20151226_1701...Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/core/management/__init__.py", line 350, in execute_from_command_line
utility.execute()
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/core/management/__init__.py", line 342, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/core/management/base.py", line 348, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/core/management/base.py", line 399, in execute
output = self.handle(*args, **options)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/core/management/commands/migrate.py", line 200, in handle
executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/db/migrations/executor.py", line 92, in migrate
self._migrate_all_forwards(plan, full_plan, fake=fake, fake_initial=fake_initial)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/db/migrations/executor.py", line 121, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/db/migrations/executor.py", line 198, in apply_migration
state = migration.apply(state, schema_editor)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/db/migrations/migration.py", line 123, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/db/migrations/operations/fields.py", line 62, in database_forwards
field,
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/db/backends/base/schema.py", line 382, in add_field
definition, params = self.column_sql(model, field, include_default=True)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/db/backends/base/schema.py", line 145, in column_sql
default_value = self.effective_default(field)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/db/backends/base/schema.py", line 210, in effective_default
default = field.get_db_prep_save(default, self.connection)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/db/models/fields/related.py", line 910, in get_db_prep_save
return self.target_field.get_db_prep_save(value, connection=connection)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/db/models/fields/__init__.py", line 728, in get_db_prep_save
prepared=False)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/django/db/models/fields/__init__.py", line 968, in get_db_prep_value
value = self.get_prep_value(value)
File "/home/alopex/repos/hacker_news/env/lib/python3.4/site-packages/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'

Plein de fichier de migration...

# -*- coding: utf-8 -*-
# Generated by Django 1.9 on 2015-12-26 17:01
from __future__ import unicode_literals
import datetime
from django.conf import settings
from django.db import migrations, models
import django.db.models.deletion
from django.utils.timezone import utc
class Migration(migrations.Migration):
dependencies = [
migrations.swappable_dependency(settings.AUTH_USER_MODEL),
('hackernews', '0002_auto_20151224_1605'),
]
operations = [
migrations.AddField(
model_name='comment',
name='created_at',
field=models.DateTimeField(auto_now_add=True, default=datetime.datetime(2015, 12, 26, 17, 1, 23, 211181, tzinfo=utc)),
preserve_default=False,
),
migrations.AddField(
model_name='comment',
name='user',
field=models.ForeignKey(default=datetime.datetime(2015, 12, 26, 17, 1, 28, 128127, tzinfo=utc), on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
preserve_default=False,
),
migrations.AddField(
model_name='commentvote',
name='created_at',
field=models.DateTimeField(auto_now_add=True, default=datetime.datetime(2015, 12, 26, 17, 1, 34, 85491, tzinfo=utc)),
preserve_default=False,
),
migrations.AddField(
model_name='post',
name='created_at',
field=models.DateTimeField(auto_now_add=True, default=datetime.datetime(2015, 12, 26, 17, 1, 37, 779457, tzinfo=utc)),
preserve_default=False,
),
migrations.AddField(
model_name='postvote',
name='created_at',
field=models.DateTimeField(auto_now_add=True, default=datetime.datetime(2015, 12, 26, 17, 1, 41, 794803, tzinfo=utc)),
preserve_default=False,
),
]

OriginalL'auteur Erik Åsland | 2015-12-26