why django models error keeps raising error? - django

Question

I moved these to models to chat app
class Message(models.Model):
sender = models.ForeignKey(CustomUser, on_delete=models.CASCADE, verbose_name="فرستنده")
receiver = models.ForeignKey(CustomUser, on_delete=models.CASCADE, verbose_name="گیرنده", related_name="reciver")
text = models.CharField("متن", max_length=500)
date_and_time = models.DateTimeField(auto_now_add=True)
subject=models.CharField(max_length=200,verbose_name="موضوع")
notification=models.OneToOneField(Notification,on_delete=models.DO_NOTHING,related_name="message",null=True)
class Meta:
verbose_name = "پیام"
verbose_name_plural = "پیام ها"
class Response(Message):
darkhast_sabt_sherekat = models.ForeignKey(SabteSherkat,on_delete=models.CASCADE,related_name="responses")
After that, it raise an error saying the local id of Response crashed with message I made everything undo and this error keeps coming up
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Operations to perform:
Apply all migrations: accounts, admin, auth, consultation, contenttypes, sessions, utilities, web
Running migrations:
Applying web.0007_auto_20210815_0831...Traceback (most recent call last):
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/db/backends/utils.py", line 86, in _execute
return self.cursor.execute(sql, params)
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/db/backends/sqlite3/base.py", line 396, in execute
return Database.Cursor.execute(self, query, params)
sqlite3.OperationalError: near ")": syntax error
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 "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
utility.execute()
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/core/management/__init__.py", line 395, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/core/management/base.py", line 328, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/core/management/base.py", line 369, in execute
output = self.handle(*args, **options)
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/core/management/base.py", line 83, in wrapped
res = handle_func(*args, **kwargs)
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/core/management/commands/migrate.py", line 231, in handle
post_migrate_state = executor.migrate(
File "/home/hamed/sqh-source/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 "/home/hamed/sqh-source/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 "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/db/migrations/executor.py", line 245, in apply_migration
state = migration.apply(state, schema_editor)
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/db/migrations/migration.py", line 124, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/db/migrations/operations/fields.py", line 178, in database_forwards
schema_editor.remove_field(from_model, from_model._meta.get_field(self.name))
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/db/backends/sqlite3/schema.py", line 346, in remove_field
self._remake_table(model, delete_field=field)
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/db/backends/sqlite3/schema.py", line 283, in _remake_table
self.execute("INSERT INTO %s (%s) SELECT %s FROM %s" % (
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/db/backends/base/schema.py", line 142, in execute
cursor.execute(sql, params)
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/db/backends/utils.py", line 100, in execute
return super().execute(sql, params)
File "/home/hamed/sqh-source/venv/lib/python3.8/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/hamed/sqh-source/venv/lib/python3.8/site-packages/django/db/backends/utils.py", line 77, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/db/backends/utils.py", line 86, in _execute
return self.cursor.execute(sql, params)
File "/home/hamed/sqh-source/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 "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/db/backends/utils.py", line 86, in _execute
return self.cursor.execute(sql, params)
File "/home/hamed/sqh-source/venv/lib/python3.8/site-packages/django/db/backends/sqlite3/base.py", line 396, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: near ")": syntax error
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I deleted every pycache and my DB and even my virtualenv but this error keeps coming up!!!!

Answer 1

Add abstract = True in Message models Meta class, maybe that's the issue.
class Message(models.Model):
class Meta:
verbose_name = "پیام"
verbose_name_plural = "پیام ها"
abstract = True