Django doesn't create test database when running test - django

I read in Django document that a blank database will be created for testing. I am new to Django so I barely changed anything in setting.py and currently using Sqlite database. However, when I run python manage.py test, Django keep telling the user has been existed, so I tried changing the username for the created users in TestCase, run the test again and found out that the new users are created in the existing database. The test file is as bellow:
class UserTestCase(unittest.TestCase):
def setUp(self):
admin = User.objects.create(username="admin", password="1")
user1 = User.objects.create(username="user1", password="1")
user2 = User.objects.create(username="user2", password="1")
admin.following.add(user1)
admin.followers.add(user2)
def test_users_count(self):
self.assertEqual(User.objects.count()==3)
My model is as bellow:
class User(AbstractUser):
followers = models.ManyToManyField('self', related_name="following", symmetrical=False, through='Follow', through_fields=('followee', 'follower'))
def __str__(self):
return f"{self.username}"
def serialize(self):
return {
"id": self.id,
"username": self.username,
}
class Follow(models.Model):
followee = models.ForeignKey(
'User',
on_delete=models.CASCADE,
related_name='+'
)
follower = models.ForeignKey(
'User',
on_delete=models.CASCADE,
related_name='+'
)
def clean(self, *args, **kwargs):
if self.follower__id == self.followee__id:
raise ValidationError('Can not follow self.')
return super().clean(*args, **kwargs)
class Meta:
constraints = [
models.UniqueConstraint(fields=['follower', 'followee'], name='follow_once'),
models.CheckConstraint(check=~Q(follower=F('followee')), name='not_follow_self')
]
EDIT: Bellow is the output when I run python manage.py test
(env_web) PS C:\Users\HL94NVT\Programming\web_development\project4> python manage.py test
System check identified no issues (0 silenced).
EE
======================================================================
ERROR: test_following_count (network.tests.UserTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\sqlite3\base.py", line 413, in execute
return Database.Cursor.execute(self, query, params)
sqlite3.IntegrityError: UNIQUE constraint failed: network_user.username
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\HL94NVT\Programming\web_development\project4\network\tests.py", line 21, in setUp
admin = User.objects.create(username="admin1", password="1")
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\query.py", line 447, in create
obj.save(force_insert=True, using=self.db)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\contrib\auth\base_user.py", line 67, in save
super().save(*args, **kwargs)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\base.py", line 754, in save
force_update=force_update, update_fields=update_fields)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\base.py", line 792, in save_base
force_update, using, update_fields,
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\base.py", line 895, in _save_table
results = self._do_insert(cls._base_manager, using, fields, returning_fields, raw)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\base.py", line 935, in _do_insert
using=using, raw=raw,
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\query.py", line 1254, in _insert
return query.get_compiler(using=using).execute_sql(returning_fields)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\sql\compiler.py", line 1397, in execute_sql
cursor.execute(sql, params)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\utils.py", line 66, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\utils.py", line 75, in _execute_with_wrappers
return executor(sql, params, many, context)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\sqlite3\base.py", line 413, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.IntegrityError: UNIQUE constraint failed: network_user.username
======================================================================
ERROR: test_users_count (network.tests.UserTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\sqlite3\base.py", line 413, in execute
return Database.Cursor.execute(self, query, params)
sqlite3.IntegrityError: UNIQUE constraint failed: network_user.username
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\HL94NVT\Programming\web_development\project4\network\tests.py", line 21, in setUp
admin = User.objects.create(username="admin1", password="1")
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\query.py", line 447, in create
obj.save(force_insert=True, using=self.db)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\contrib\auth\base_user.py", line 67, in save
super().save(*args, **kwargs)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\base.py", line 754, in save
force_update=force_update, update_fields=update_fields)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\base.py", line 792, in save_base
force_update, using, update_fields,
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\base.py", line 895, in _save_table
results = self._do_insert(cls._base_manager, using, fields, returning_fields, raw)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\base.py", line 935, in _do_insert
using=using, raw=raw,
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\query.py", line 1254, in _insert
return query.get_compiler(using=using).execute_sql(returning_fields)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\models\sql\compiler.py", line 1397, in execute_sql
cursor.execute(sql, params)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\utils.py", line 66, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\utils.py", line 75, in _execute_with_wrappers
return executor(sql, params, many, context)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\HL94NVT\Programming\web_development\env_web\lib\site-packages\django\db\backends\sqlite3\base.py", line 413, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.IntegrityError: UNIQUE constraint failed: network_user.username
----------------------------------------------------------------------
Ran 2 tests in 0.063s

Using django.test.TestCase instead of unittest.TestCase helps according to the document
https://docs.djangoproject.com/en/3.1/topics/testing/overview/
If your tests rely on database access such as creating or querying models, be sure to create your test classes as subclasses of django.test.TestCase rather than unittest.TestCase.
Using unittest.TestCase avoids the cost of running each test in a transaction and flushing the database, but if your tests interact with the database their behavior will vary based on the order that the test runner executes them. This can lead to unit tests that pass when run in isolation but fail when run in a suite.

Related

django test fail to build foreign key relationship with hidden related_name

I have two models:
class Model1(BaseModel):
hidden = models.ForeignKey(
Model2,
default=10,
related_name='+',
)
class Model2(models.Model):
# model content
so the issue is, when using django test, the test database cannot create the relationship between Model1 and Model2, I suspect it's because of the field related_name='+' . Not sure what is the work around for this without changing the related_name.
the fail info is
File "/app/src/save.py", line 317, in save_app
model1.object.save()
File "/app/venv/lib/python3.7/site-packages/django/db/models/base.py", line 740, in save
force_update=force_update, update_fields=update_fields)
File "/app/venv/lib/python3.7/site-packages/django/db/models/base.py", line 778, in save_base
force_update, using, update_fields,
File "/app/venv/lib/python3.7/site-packages/django/db/models/base.py", line 881, in _save_table
results = self._do_insert(cls._base_manager, using, fields, returning_fields, raw)
File "/app/venv/lib/python3.7/site-packages/django/db/models/base.py", line 921, in _do_insert
using=using, raw=raw,
File "/app/venv/lib/python3.7/site-packages/django/db/models/manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/app/venv/lib/python3.7/site-packages/django/db/models/query.py", line 1270, in _insert
return query.get_compiler(using=using).execute_sql(returning_fields)
File "/app/venv/lib/python3.7/site-packages/django/db/models/sql/compiler.py", line 1416, in execute_sql
cursor.execute(sql, params)
File "/app/venv/lib/python3.7/site-packages/django/db/backends/utils.py", line 66, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "/app/venv/lib/python3.7/site-packages/django/db/backends/utils.py", line 75, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/app/venv/lib/python3.7/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "/app/venv/lib/python3.7/site-packages/django/db/utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/app/venv/lib/python3.7/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
django.db.utils.IntegrityError: insert or update on table "Model1" violates foreign key constraint "Model1_hidden_1ba57f04_fk_Model2"
DETAIL: Key (Model1_hidden_id)=(10) is not present in table "Model2".
problem solved by pre-populate the testing database by using the fixture option. related_name="+" is not the real issue. real issue is the database needs to be populated before the test.

Django | Factory boy | faking a boolean field | django.db.utils.DataError: value too long for type character varying(1)

I am trying to use factory boy to generate fake entries but I'm stepping on an issue related with the boolean field.
Follows the Model and ModelFactory:
# models.py
class Record(models.Model):
date_creation = models.DateTimeField()
rec_type = models.CharField(max_length=1, choices=RECORD_TYPES)
direction = models.BooleanField()
# factories.py
class RecordFactory(DjangoModelFactory):
class Meta:
model = Record
date_creation = factory.Faker('date_time')
rec_type = factory.Faker('random_choices', elements=[x[1] for x in Record.RECORD_TYPES])
direction = factory.Faker('pybool')
How do I fix this issue? Seems to be related with the boolean field.
/usr/local/lib/python3.7/site-packages/django/db/models/fields/__init__.py:1427: RuntimeWarning: DateTimeField Record.date_creation received a naive datetime (1
977-11-24 14:21:26) while time zone support is active.
RuntimeWarning)
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
psycopg2.errors.StringDataRightTruncation: value too long for type character varying(1)
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 30, in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python3.7/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python3.7/site-packages/django/core/management/__init__.py", line 375, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python3.7/site-packages/django/core/management/base.py", line 323, in run_from_argv
self.execute(*args, **cmd_options)
File "/usr/local/lib/python3.7/site-packages/django/core/management/base.py", line 364, in execute
output = self.handle(*args, **options)
File "/app/iur/core/management/commands/seed.py", line 60, in handle
self.create(options["records"], RecordFactory)
File "/app/iur/core/management/commands/seed.py", line 47, in create
factory_class.create()
File "/usr/local/lib/python3.7/site-packages/factory/base.py", line 564, in create
return cls._generate(enums.CREATE_STRATEGY, kwargs)
File "/usr/local/lib/python3.7/site-packages/factory/django.py", line 141, in _generate
return super(DjangoModelFactory, cls)._generate(strategy, params)
File "/usr/local/lib/python3.7/site-packages/factory/base.py", line 501, in _generate
return step.build()
File "/usr/local/lib/python3.7/site-packages/factory/builder.py", line 279, in build
kwargs=kwargs,
File "/usr/local/lib/python3.7/site-packages/factory/base.py", line 315, in instantiate
return self.factory._create(model, *args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/factory/django.py", line 185, in _create
return manager.create(*args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/django/db/models/query.py", line 422, in create
obj.save(force_insert=True, using=self.db)
File "/usr/local/lib/python3.7/site-packages/django/db/models/base.py", line 741, in save
force_update=force_update, update_fields=update_fields)
File "/usr/local/lib/python3.7/site-packages/django/db/models/base.py", line 779, in save_base
force_update, using, update_fields,
File "/usr/local/lib/python3.7/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 "/usr/local/lib/python3.7/site-packages/django/db/models/base.py", line 908, in _do_insert
using=using, raw=raw)
File "/usr/local/lib/python3.7/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/django/db/models/query.py", line 1186, in _insert
return query.get_compiler(using=using).execute_sql(return_id)
File "/usr/local/lib/python3.7/site-packages/django/db/models/sql/compiler.py", line 1335, in execute_sql
cursor.execute(sql, params)
File "/usr/local/lib/python3.7/site-packages/django/db/backends/utils.py", line 99, in execute
return super().execute(sql, params)
File "/usr/local/lib/python3.7/site-packages/django/db/backends/utils.py", line 67, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "/usr/local/lib/python3.7/site-packages/django/db/backends/utils.py", line 76, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/usr/local/lib/python3.7/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "/usr/local/lib/python3.7/site-packages/django/db/utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/usr/local/lib/python3.7/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
django.db.utils.DataError: value too long for type character varying(1)
It might not be the boolean field that cause the error but
rec_type = models.CharField(max_length=1, choices=RECORD_TYPES)
As it's max_length is 1. Can you confirm that RECORD_TYPES are max 1 character?
django.db.utils.DataError: value too long for type character varying(1)
This should indicate that it's a VARCHAR of max length 1. And from what I can see from the trace, you're db backend is postgres where there is a native boolean field.
The major issue was that I was using the wrong Faker. This one did what I expected:
# factories.py
...
rec_type = factory.Faker('random_element', elements=[x[0] for x in Record.RECORD_TYPES])
...
Just set e.g. direction = False in RecordFactory. Or, if you want to use faker, you can do direction = Faker().pybool()
I think the error is telling you that your DB backend uses a one letter varchar for representing booleans (most probably "t" and "f").

Django throws "[12728] ERROR: CREATE DATABASE cannot run inside a transaction block" when tried to create postgresql database

I'm running django 2.1.4 on python 3.6 with latest Postgresql.
Problem is, when I'm trying to create database from django code, it returning "current transaction is aborted, commands ignored until end of transaction block". Here is my code ->
#transaction.atomic
def mutate(self, info, username, password, email, name, phone, company, country):
user = get_user_model()(
first_name=name,
username=username,
email=email,
is_active=False
)
user.set_password(password)
user.save()
get_country = Country.objects.filter(id=country).first()
company = Company(name=company, phone=phone, user=user, country=get_country)
company.save()
code = secrets.token_hex(16)
activation = ActivationCode(user=user, code=code)
activation.save()
try:
with connection.cursor() as cursor:
cursor.execute("CREATE DATABASE company_" + str(company.id))
except:
GraphQLError("Something went wrong! Please contact the support center!")
finally:
cursor.close()
db = CompanyDatabase(db_name="company_" + str(company.id), company=company)
db.save()
return CreateUser(user=user, company=company)
But it creates the database from django shell ->
shell image
Here's the postgres log error ->
[12728] ERROR: CREATE DATABASE cannot run inside a transaction block
Here's the terminal errors generated ->
Traceback (most recent call last):
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\promise\promise.py", line 487, in _resolve_from_executo
r
executor(resolve, reject)
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\promise\promise.py", line 754, in executor
return resolve(f(*args, **kwargs))
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\graphql\execution\middleware.py", line 75, in make_it_p
romise
return next(*args, **kwargs)
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\contextlib.py", line 52, in inner
return func(*args, **kwds)
File "D:\xERP\graphqltest\users\schema.py", line 68, in mutate
db.save()
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\models\base.py", line 718, in save
force_update=force_update, update_fields=update_fields)
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\models\base.py", line 748, in save_base
updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\models\base.py", line 831, in _save_table
result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\models\base.py", line 869, in _do_insert
using=using, raw=raw)
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\models\manager.py", line 82, in manager_metho
d
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\models\query.py", line 1136, in _insert
return query.get_compiler(using=using).execute_sql(return_id)
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\models\sql\compiler.py", line 1289, in execut
e_sql
cursor.execute(sql, params)
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\utils.py", line 100, in execute
return super().execute(sql, params)
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\utils.py", line 68, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\utils.py", line 77, in _execute_with
_wrappers
return executor(sql, params, many, context)
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\Envy\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
graphql.error.located_error.GraphQLLocatedError: current transaction is aborted, commands ignored until end of transaction block
You must set the connection to autocommit mode before running CREATE DATABASE, otherwise psycopg2 will wrap it in an explicit transaction, which leads to the observed error.

django_celery_beat - "no such table: main.django_celery_beat_solarschedule__old" while updating "django_celery_beat_periodictask"

I'm using django + celery, when running django devserver I'm getting exception
django.db.utils.OperationalError: no such table: main.django_celery_beat_solarschedule__old
and callstack tells that it occured while doing insert into table django_celery_beat_periodictask
Database is sqlite3. Python version is 3.5.6. All migrations were applied and django_celery_beat was added to settings
Calling code:
def register_task(task, interval=DEFAULT_TASK_INTERVAL):
logger.info("Registering periodic task %s with interval %s", task, interval)
name = "Default {}".format(task)
schedule, _ = IntervalSchedule.objects.update_or_create(
every=interval, period=IntervalSchedule.SECONDS)
PeriodicTask.objects.update_or_create(
name=name, defaults={
"interval": schedule,
"task": task
})
Actual traceback:
File "/home/zab/Git/overview-server/overview-server/src/basis/tasks/shedule.py", line 21, in register_task
"task": task
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django_celery_beat/managers.py", line 14, in update_or_create
obj, created = self.get_or_create(defaults=defaults, **kwargs)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/models/query.py", line 489, in get_or_create
return self._create_object_from_params(lookup, params)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/models/query.py", line 521, in _create_object_from_params
obj = self.create(**params)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/models/query.py", line 417, in create
obj.save(force_insert=True, using=self.db)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django_celery_beat/models.py", line 316, in save
super(PeriodicTask, self).save(*args, **kwargs)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/models/base.py", line 729, in save
force_update=force_update, update_fields=update_fields)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/models/base.py", line 759, in save_base
updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/models/base.py", line 842, in _save_table
result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/models/base.py", line 880, in _do_insert
using=using, raw=raw)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/models/query.py", line 1125, in _insert
return query.get_compiler(using=using).execute_sql(return_id)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/models/sql/compiler.py", line 1285, in execute_sql
cursor.execute(sql, params)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/backends/utils.py", line 100, in execute
return super().execute(sql, params)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/backends/utils.py", line 68, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/backends/utils.py", line 77, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/backends/utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/backends/utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "/home/zab/venv/overview/lib/python3.5/site-packages/django/db/backends/sqlite3/base.py", line 303, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: no such table: main.django_celery_beat_solarschedule__old
I suppose you didn't run migrate and as result those tables were not created.
Run
python manage.py migrate
And make sure you added it to INSTALLED_APPS
INSTALLED_APPS = (
...,
'django_celery_beat',
)
The problem was in Django. Migrations were broken for new sqlite.
https://code.djangoproject.com/ticket/29182
Bumping for recent answer. I was using the tables before they were migrated. So I commented out all the code involving beat (except installed apps), ran python manage.py migrate fresh, then uncommented the code

Django Admin with Parler translations generates IntegrityError

I'm using Django Parler 1.9.2 and Django 2.1.
I have a Business Admin Class with inlines to edit the related models (Service and Resource)
class ServiceInline(TranslatableTabularInline):
model = Service
class ResourceInline(TranslatableTabularInline):
model = Resource
#admin.register(Business)
class BusinessAdmin(TranslatableAdmin):
inlines = [ServiceInline, ResourceInline]
When I try edit a Business in Admin it gives me a IntegrityError:
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/forms/models.py", line 650, in save_existing
return form.save(commit=commit)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/forms/models.py", line 458, in save
self.instance.save()
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/parler/models.py", line 648, in save
self.save_translations(*args, **kwargs)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/parler/models.py", line 701, in save_translations
self.save_translation(translation, *args, **kwargs)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/parler/models.py", line 728, in save_translation
translation.save(*args, **kwargs)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/db/models/base.py", line 717, in save
force_update=force_update, update_fields=update_fields)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/parler/models.py", line 892, in save_base
super(TranslatedFieldsModelMixin, self).save_base(raw=raw, using=using, **kwargs)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/db/models/base.py", line 747, in save_base
updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/db/models/base.py", line 833, in _save_table
result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/db/models/base.py", line 872, in _do_insert
using=using, raw=raw)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/db/models/query.py", line 1133, in _insert
return query.get_compiler(using=using).execute_sql(return_id)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1285, in execute_sql
cursor.execute(sql, params)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/db/backends/utils.py", line 100, in execute
return super().execute(sql, params)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/db/backends/utils.py", line 68, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/db/backends/utils.py", line 77, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/db/utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/home/vagrant/.virtualenvs/appy/lib/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
django.db.utils.IntegrityError: duplicate key value violates unique constraint "businesses_resource_tran_language_code_master_id_598f5fae_uniq"
DETAIL: Key (language_code, master_id)=(en, 9) already exists.
Any idea in how to solve this?
It's resolved. A was a database trigger. This trigger created a new entry before the execution of save method but after the object being created. I think it's a Django limitation.