Django Migrations: How to resolve error of charfield to datetimefield - django

What im doing is i clone my prod database to sandbox. and I'm getting error while migrate Cause of previously I made charfield to datetime field. And then datetime field to Charfield after few migrations.
So how do I solve below error:
Error :
python manage.py migrate
System check identified some issues:
WARNINGS:
Operations to perform:
Apply all migrations: admin, auth, contenttypes, pro_auth, service_list, sessions, token_blacklist
Running migrations:
Applying pro_auth.0002_alter_userorder_order_booking_time...Traceback (most recent call last):
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
psycopg2.errors.InvalidDatetimeFormat: invalid input syntax for type timestamp with time zone: "2021-10-10 10.00"
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 22, in <module>
main()
File "manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/core/management/__init__.py", line 419, in execute_from_command_line
utility.execute()
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/core/management/__init__.py", line 413, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/core/management/base.py", line 354, in run_from_argv
self.execute(*args, **cmd_options)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/core/management/base.py", line 398, in execute
output = self.handle(*args, **options)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/core/management/base.py", line 89, in wrapped
res = handle_func(*args, **kwargs)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/core/management/commands/migrate.py", line 244, in handle
post_migrate_state = executor.migrate(
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/migrations/executor.py", line 117, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/migrations/executor.py", line 147, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/migrations/executor.py", line 227, in apply_migration
state = migration.apply(state, schema_editor)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/migrations/migration.py", line 126, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/migrations/operations/fields.py", line 244, in database_forwards
schema_editor.alter_field(from_model, from_field, to_field)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/backends/base/schema.py", line 608, in alter_field
self._alter_field(model, old_field, new_field, old_type, new_type,
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/backends/postgresql/schema.py", line 196, in _alter_field
super()._alter_field(
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/backends/base/schema.py", line 765, in _alter_field
self.execute(
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/backends/base/schema.py", line 145, in execute
cursor.execute(sql, params)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/backends/utils.py", line 98, in execute
return super().execute(sql, params)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/backends/utils.py", line 66, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/backends/utils.py", line 75, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/root/sandbox/sandbox_venv/lib/python3.8/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
django.db.utils.DataError: invalid input syntax for type timestamp with time zone: "2021-10-10 10.00"
And Here is Migration file 0002_alter_userorder_order_booking_time:
from django.db import migrations, models
import django.utils.timezone
class Migration(migrations.Migration):
dependencies = [
('pro_auth', '0001_initial'),
]
operations = [
migrations.AlterField(
model_name='userorder',
name='order_booking_time',
field=models.DateTimeField(default=django.utils.timezone.now),
),
]

I think, you need fake migration.
Try this
./manange.py migrate --fake <app_name_of_userorder_is_inclueded> <last_migration_number_which_synced_current_order_booking_time>
This make skip applying alter table.

You're not passing a valid DateTimeFormat. I think you should write
field=models.DateTimeField(default=django.utils.timezone.now()),
based on what is shown here: Django default=timezone.now() saves records using "old" time

Related

Django migration gives psycopg2.errors.DuplicateTable: relation error

I have previously restored the database for the system, and while i tried to migrate through the django applicaion, the following error is thrown. What is the possible cause and how can we mitigate such cases. I guess the problem is with the existing table conflict, will it solve the issue by delete/dropping the conflicting tables.
Applying introduction.0001_initial...Traceback (most recent call last):
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql)
psycopg2.errors.DuplicateTable: relation "introduction_introduction" already exists
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 21, in <module>
main()
File "manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
utility.execute()
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\core\management\__init__.py", line 395, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\core\management\base.py", line 328, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\core\management\base.py", line 369, in execute
output = self.handle(*args, **options)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\core\management\base.py", line 83, in wrapped
res = handle_func(*args, **kwargs)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\core\management\commands\migrate.py", line 231, in handle
post_migrate_state = executor.migrate(
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\db\migrations\executor.py", line 117, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\db\migrations\executor.py", line 147, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\db\migrations\executor.py", line 245, in apply_migration
state = migration.apply(state, schema_editor)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\db\migrations\migration.py", line 124, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\db\migrations\operations\models.py", line 92, in database_forwards
schema_editor.create_model(model)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\db\backends\base\schema.py", line 324, in create_model
self.execute(sql, params or None)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\db\backends\base\schema.py", line 142, in execute
cursor.execute(sql, params)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\db\backends\utils.py", line 100, in execute
return super().execute(sql, params)
File "C:\Users\HG\Desktop\RC\SB\venv\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\HG\Desktop\RC\SB\venv\lib\site-packages\django\db\backends\utils.py", line 77, in _execute_with_wrappers
return executor(sql, params, many, context)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\db\backends\utils.py", line 86, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\db\utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\HG\Desktop\RC\SB\venv\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql)
django.db.utils.ProgrammingError: relation "introduction_introduction" already exists```
I had the same problem and solved it by deleting the database a running the inital migrations again

Running migrate on postgresql db is attempting to migrate already migrated migrations

I've recently upgraded form sqlite to postgresql for my django project.
In the past, whenever I've made a change to a model, I simply ran makemigrations and then the migrate command. No issues.
Now, with posgresql, when I make the INITIAL makemigrations/migrate, it works fine as per usual, but if I make a change to a model and then run makemigrations and then migrate, on the 'migrate' command, the system tries to apply the initial migration again and returns an error saying the table already exist (which it does).
How can I run migrate without the system trying to remigrate migrations that have already been migrated?
Thanks!
Traceback (most recent call last):
File "manage.py", line 15, in <module>
execute_from_command_line(sys.argv)
File "/home/jimmy/lib/python3.6/django/core/management/__init__.py", line 401, in execute_from_command_line
utility.execute()
File "/home/jimmy/lib/python3.6/django/core/management/__init__.py", line 395, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/jimmy/lib/python3.6/django/core/management/base.py", line 328, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/jimmy/lib/python3.6/django/core/management/base.py", line 369, in execute
output = self.handle(*args, **options)
File "/home/jimmy/lib/python3.6/django/core/management/base.py", line 83, in wrapped
res = handle_func(*args, **kwargs)
File "/home/jimmy/lib/python3.6/django/core/management/commands/migrate.py", line 233, in handle
fake_initial=fake_initial,
File "/home/jimmy/lib/python3.6/django/db/migrations/executor.py", line 117, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
File "/home/jimmy/lib/python3.6/django/db/migrations/executor.py", line 147, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "/home/jimmy/lib/python3.6/django/db/migrations/executor.py", line 245, in apply_migration
state = migration.apply(state, schema_editor)
File "/home/jimmy/lib/python3.6/django/db/migrations/migration.py", line 124, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/home/jimmy/lib/python3.6/django/db/migrations/operations/models.py", line 92, in database_forwards
schema_editor.create_model(model)
File "/home/jimmy/lib/python3.6/django/db/backends/base/schema.py", line 324, in create_model
self.execute(sql, params or None)
File "/home/jimmy/lib/python3.6/django/db/backends/base/schema.py", line 142, in execute
cursor.execute(sql, params)
File "/home/jimmy/lib/python3.6/django/db/backends/utils.py", line 68, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "/home/jimmy/lib/python3.6/django/db/backends/utils.py", line 77, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/home/jimmy/lib/python3.6/django/db/backends/utils.py", line 86, in _execute
return self.cursor.execute(sql, params)
File "/home/jimmy/lib/python3.6/django/db/utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/home/jimmy/lib/python3.6/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql)
django.db.utils.ProgrammingError: relation "profiles_accentcolor" already exists
Looks like i have to run python manage.py migrate --fake-initial to ignore initial migrations.

django wrong in the migration

What is wrong?
C:\holamundo>python manage.py makemigrations App
Migrations for 'App':
App\migrations\0002_auto_20181216_0745.py
- Alter field nombre on tabla
resultado:
C:\holamundo>python manage.py migrate
Operations to perform:
Apply all migrations: App, admin, auth, contenttypes, sessions
Running migrations:
Applying App.0001_initial...Traceback (most recent call last):
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\backends\utils.py", line 83, in _execute
return self.cursor.execute(sql)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\backends\sqlite3\base.py", line 294, in execute
return Database.Cursor.execute(self, query)
sqlite3.OperationalError: duplicate column name: ID
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 15, in <module>
execute_from_command_line(sys.argv)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\core\management\__init__.py", line 381, in execute_from_command_line
utility.execute()
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\core\management\__init__.py", line 375, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\core\management\base.py", line 316, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\core\management\base.py", line 353, in execute
output = self.handle(*args, **options)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\core\management\base.py", line 83, in wrapped
res = handle_func(*args, **kwargs)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\core\management\commands\migrate.py", line 203, in handle
fake_initial=fake_initial,
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\migrations\executor.py", line 117, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\migrations\executor.py", line 147, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\migrations\executor.py", line 244, in apply_migration
state = migration.apply(state, schema_editor)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\migrations\migration.py", line 124, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\migrations\operations\models.py", line 91, in database_forwards
schema_editor.create_model(model)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\backends\base\schema.py", line 312, in create_model
self.execute(sql, params or None)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\backends\base\schema.py", line 133, in execute
cursor.execute(sql, params)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\backends\utils.py", line 100, in execute
return super().execute(sql, params)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\backends\utils.py", line 68, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\backends\utils.py", line 77, in _execute_with_wrappers
return executor(sql, params, many, context)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\backends\utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\backends\utils.py", line 83, in _execute
return self.cursor.execute(sql)
File "C:\Users\kleys\AppData\Local\Programs\Python\Python37\lib\site-packages\django-2.1.3-py3.7.egg\django\db\backends\sqlite3\base.py", line 294, in execute
return Database.Cursor.execute(self, query)
django.db.utils.OperationalError: duplicate column name: ID
the table:
from django.db import models
# Create your models here.
class tabla (models.Model):
ID = models.PositiveSmallIntegerField()
nombre = models.CharField(max_length=50)
edad = models.PositiveSmallIntegerField()
comida = models.PositiveSmallIntegerField()
cantidad = models.PositiveSmallIntegerField()
def datos(self):
cadena="{0}, {1} {2} {3} {4}"
return cadena.format(self.ID, self.nombre,self.edad,self.comida,self.cantidad)
def __str__(self):
return self.datos()
You need to add primary_key=True if you want to override the id field.
id = models.PositiveIntegerField(primary_key=True)

Unable to create table in the database using Django oracle12c

I am working on a college project for which I am supposed to use oracle database as the backend and I have chosen to work with django as the programming language.
I have successfully connected django with oracle 12c and also have cx_Oracle installed. But when i try to run the command
py manage.py migrate
the following errors show up.
Windows PowerShell Copyright (C) Microsoft Corporation. All rights
reserved.
PS C:\Users\Hp\Desktop\onlinepharma> py manage.py migrate
Operations to perform:
Apply all migrations: admin, auth, contenttypes, sessions, testing Running migrations: Applying contenttypes.0001_initial...Traceback
(most recent call last): File
"C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-
packages\django\db\backends\utils.py", line 83, in _execute
return self.cursor.execute(sql) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\backends\oracle\base.py",
line 513, in execute
return self.cursor.execute(query, self._param_generator(params)) cx_Oracle.DatabaseError: ORA-00955: name is already used by an
existing object
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "manage.py", line 15, in
execute_from_command_line(sys.argv) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\core\management__init__.py",
line 381, in execute_from_command_line
utility.execute() File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\core\management__init__.py",
line 375, in execute
self.fetch_command(subcommand).run_from_argv(self.argv) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\core\management\base.py",
line 316, in run_from_argv
self.execute(*args, **cmd_options) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\core\management\base.py",
line 353, in execute
output = self.handle(*args, **options) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\core\management\base.py",
line 83, in wrapped
res = handle_func(*args, **kwargs) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\core\management\commands\migrate.py",
line 203, in handle
fake_initial=fake_initial, File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\migrations\executor.py",
line 117, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial) File
"C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\migrations\executor.py",
line 147, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial) File
"C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\migrations\executor.py",
line 244, in apply_migration
state = migration.apply(state, schema_editor) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\migrations\migration.py",
line 124, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state) File
"C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\migrations\operations\models.py",
line 91, in database_forwards
schema_editor.create_model(model) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\backends\base\schema.py",
line 312, in create_model
self.execute(sql, params or None) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\backends\base\schema.py",
line 133, in execute
cursor.execute(sql, params) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\backends\utils.py",
line 100, in execute
return super().execute(sql, params) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\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\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\backends\utils.py",
line 77, in _execute_with_wrappers
return executor(sql, params, many, context) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\backends\utils.py",
line 85, in _execute
return self.cursor.execute(sql, params) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\utils.py",
line 89, in exit
raise dj_exc_value.with_traceback(traceback) from exc_value File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\backends\utils.py",
line 83, in _execute
return self.cursor.execute(sql) File "C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\backends\oracle\base.py",
line 513, in execute
return self.cursor.execute(query, self._param_generator(params)) django.db.utils.DatabaseError: ORA-00955: name is already used by an
existing object
Here's my model.py file
from django.db import models
# Create your models here.
class yoman(models.Model):
text=models.CharField(max_length=200)
But I have checked using sql command line and no such db table or view exists.
p.s: The makemigrations command works properly and the migratiosn file has also been created.
You can print out the sql query if you edit the following file:
"C:\Users\Hp\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\backends\oracle\base.py
On line 513, before the execute function is called add:
print(f'query')
Rerun the migration and you can see the sql that is failing to run. Either remove or rename the table/object in the db.

Sqllite and Django shell are not in sync

I have deleted a table from sqllite3 shell and then when I try creating it again by running python manage.py migrate/python manage.py makemigrations table is not created and showing below error. How to re-create the table and make my db and the API is insync. I tried with the python manage.py dbsync also but not worked.
Operations to perform:
Apply all migrations: admin, auth, cgkapp, contenttypes, sessions
Running migrations:
Applying cgkapp.0002_delete_questions...Traceback (most recent call last):
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line 303, in execute
return Database.Cursor.execute(self, query, params)
sqlite3.OperationalError: no such table: cgkapp_questions
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 22, in <module>
execute_from_command_line(sys.argv)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/core/management/__init__.py", line 371, in execute_from_command_line
utility.execute()
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/core/management/__init__.py", line 365, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/core/management/base.py", line 288, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/core/management/base.py", line 335, in execute
output = self.handle(*args, **options)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 200, in handle
fake_initial=fake_initial,
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/migrations/executor.py", line 117, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/migrations/executor.py", line 147, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/migrations/executor.py", line 244, in apply_migration
state = migration.apply(state, schema_editor)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/migrations/migration.py", line 122, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/migrations/operations/models.py", line 246, in database_forwa
rds
schema_editor.delete_model(model)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/backends/sqlite3/schema.py", line 287, in delete_model
super().delete_model(model)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 317, in delete_model
"table": self.quote_name(model._meta.db_table),
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 117, in execute
cursor.execute(sql, params)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/backends/utils.py", line 100, in execute
return super().execute(sql, params)
File "/home/shrivatsa555/.virtualenvs/django20/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/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/backends/utils.py", line 77, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "/home/shrivatsa555/.virtualenvs/django20/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/shrivatsa555/.virtualenvs/django20/lib/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "/home/shrivatsa555/.virtualenvs/django20/lib/python3.6/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: cgkapp_questions
Django migrate command try to make all migrations (they hold in migrations directory) which are not done yet.
In here you have "0002_delete_questions" migration file in your migrations directory and when you run the migrate command this migration try to delete questions table from your database but this table is already deleted. So you can handle this in two way
Delete this migration file from migrations directory in your project
run this command python manage.py migrate --fake cgkapp 0002_delete_questions (here 'cgkapp' is your app name and '0002_delete_questions' is your migration file name)