django.db.utils.ProgrammingError: relation "django_content_type" already exists

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Ram

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Nov 30, 2019, 12:04:04 PM11/30/19
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 Hi,

I'm blocked with this issue in my newly hosting site. Here is my scenario.

  1. I've working site with MySQL database in our development localhost.
  2. I created new hosting server in Digital Ocean's Ubuntu 18.04 droplet with Postgres db.
  3. I tested the server with empty database and empty Django site when I build this hosting server.
  4. I manually migrated MySQL database to Postgres using pgAdmin tool and ran 'loaddata'command in virtualenv to load the data to Postgress.

  5. Now when I ran the following commands I see the same issue as reported here.

  6. (vkenv) shami@ubuntu-wed-01:~$ ~/vkproject/manage.py makemigrations
    No changes detected
    (vkenv) shami@ubuntu-wed-01~$ ~/vkproject/manage.py migrate
    Operations to perform:
      Apply all migrations: admin, auth, contenttypes, pages, sessions
    Running migrations:
      Applying contenttypes.0001_initial...Traceback (most recent call last):
      File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 82, in _execute
        return self.cursor.execute(sql)
    psycopg2.errors.DuplicateTable: relation "django_content_type" already exists

    The above exception was the direct cause of the following exception:

    Traceback (most recent call last):
      File "/home/shami/vkproject/manage.py", line 21, in <module>
        main()
      File "/home/shami/vkproject/manage.py", line 17, in main
        execute_from_command_line(sys.argv)
      File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
        utility.execute()
      File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/__init__.py", line 375, in execute
        self.fetch_command(subcommand).run_from_argv(self.argv)
      File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/base.py", line 323, in run_from_argv
        self.execute(*args, **cmd_options)
      File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/base.py", line 364, in execute
        output = self.handle(*args, **options)
      File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/base.py", line 83, in wrapped
        res = handle_func(*args, **kwargs)
      File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 234, in handle
        fake_initial=fake_initial,
      File "/home/shami/vkproject/vkenv/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/shami/vkproject/vkenv/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/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/migrations/executor.py", line 245, in apply_migration
        state = migration.apply(state, schema_editor)
      File "/home/shami/vkproject/vkenv/lib/python3.6/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/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/migrations/operations/models.py", line 92, in database_forwards
        schema_editor.create_model(model)
      File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 307, in create_model
        self.execute(sql, params or None)
      File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 137, in execute
        cursor.execute(sql, params)
      File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 99, in execute
        return super().execute(sql, params)
      File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 67, in execute
        return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
      File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 76, in _execute_with_wrappers
        return executor(sql, params, many, context)
      File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 84, in _execute
        return self.cursor.execute(sql, params)
      File "/home/shami/vkproject/vkenv/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/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 82, in _execute
        return self.cursor.execute(sql)
    django.db.utils.ProgrammingError: relation "django_content_type" already exists

  7.     (vkenv) shami@ubuntu-wed-01:~$ ~/vkproject/manage.py showmigrations
    admin
     [ ] 0001_initial
     [ ] 0002_logentry_remove_auto_add
     [ ] 0003_logentry_add_action_flag_choices
    auth
     [ ] 0001_initial
     [ ] 0002_alter_permission_name_max_length
     [ ] 0003_alter_user_email_max_length
     [ ] 0004_alter_user_username_opts
     [ ] 0005_alter_user_last_login_null
     [ ] 0006_require_contenttypes_0002
     [ ] 0007_alter_validators_add_error_messages
     [ ] 0008_alter_user_username_max_length
     [ ] 0009_alter_user_last_name_max_length
     [ ] 0010_alter_group_name_max_length
     [ ] 0011_update_proxy_permissions
    contenttypes
     [ ] 0001_initial
     [ ] 0002_remove_content_type_name
    pages
     [ ] 0001_initial
     [ ] 0002_auto_20190504_1638
     [ ] 0003_auto_20190504_1645
     [ ] 0004_auto_20190504_1651
     [ ] 0005_auto_20190506_1451
     [ ] 0006_auto_20190506_1558
     [ ] 0007_auto_20190506_1803
     [ ] 0008_auto_20190508_1455
     [ ] 0009_auto_20190508_1554
     [ ] 0010_rim_banners
     [ ] 0011_rim_banners_link_id
     [ ] 0012_auto_20190520_1137
     [ ] 0013_auto_20190520_1144
     [ ] 0014_rim_transactions_cj
     [ ] 0015_auto_20190617_1756
     [ ] 0016_auto_20190619_1433
     [ ] 0017_rim_cj_feed
    sessions
     [ ] 0001_initial
    (vkenv) shami@ubuntu-wed-01:~$ 
            
    (vkenv) shami@ubuntu-wed-01:~$ ~/vkproject/manage.py --version
    2.2.7

I appreciate if someone can provide a clue here.

Thanks in advance,

~Ram

Integr@te System

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Nov 30, 2019, 1:29:06 PM11/30/19
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Hi issuer,

You do step 4 and step 5 with the same goal!?

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Ram

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Nov 30, 2019, 2:14:19 PM11/30/19
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Hi Integr,

Thank you for your email.

Your mean these steps have to be run again?

4. 'loaddata'command in virtualenv to load the data to Postgress.
5. ~/vkproject/manage.py makemigrations
6. ~/vkproject/manage.py migrate

~Ram

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Ram

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Dec 4, 2019, 1:19:16 AM12/4/19
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Hi Integr,

I tried as per your suggestion and the issue is not fix yet. Please let me know what I'm missing? Here is the result of each command.

(vkenv) shami@ubuntu-wed-01:~/vkproject$ python manage.py dumpdata --exclude=contenttypes --exclude=auth.Permission > vikreya120319afterdroppingcron.json
(vkenv) shami@ubuntu-wed-01:~/vkproject$

(vkenv) shami@ubuntu-wed-01:~/vkproject$ python manage.py loaddata vikreya120319afterdroppingcron.json
Installed 82150 object(s) from 1 fixture(s)
(vkenv) shami@ubuntu-wed-01:~/vkproject$

(vkenv) shami@ubuntu-wed-01:~/vkproject$ python manage.py makemigrations
No changes detected
(vkenv) shami@ubuntu-wed-01:~/vkproject$

(vkenv) shami@ubuntu-wed-01:~/vkproject$ python manage.py migrate

Operations to perform:
  Apply all migrations: admin, auth, contenttypes, pages, sessions
Running migrations:
  Applying contenttypes.0002_remove_content_type_name...Traceback (most recent call last):

  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
psycopg2.errors.UndefinedColumn: column "name" of relation "django_content_type" does not exist


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/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/base.py", line 364, in execute
    output = self.handle(*args, **options)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/base.py", line 83, in wrapped
    res = handle_func(*args, **kwargs)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 234, in handle
    fake_initial=fake_initial,
  File "/home/shami/vkproject/vkenv/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/shami/vkproject/vkenv/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/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/migrations/executor.py", line 245, in apply_migration
    state = migration.apply(state, schema_editor)
  File "/home/shami/vkproject/vkenv/lib/python3.6/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/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/migrations/operations/fields.py", line 249, in database_forwards
    schema_editor.alter_field(from_model, from_field, to_field)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 535, in alter_field
    old_db_params, new_db_params, strict)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/postgresql/schema.py", line 124, in _alter_field
    new_db_params, strict,
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 685, in _alter_field
    params,

  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 137, in execute
    cursor.execute(sql, params)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 99, in execute
    return super().execute(sql, params)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 67, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 76, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "/home/shami/vkproject/vkenv/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/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: column "name" of relation "django_content_type" does not exist

(vkenv) shami@ubuntu-wed-01:~/vkproject$


Best regards,
~Ram

Naveen

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Dec 4, 2019, 6:28:08 AM12/4/19
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Ram

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Dec 4, 2019, 5:42:18 PM12/4/19
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Hello Naveen,

I already tried that before posting my last update but the result is the same though. Here I'm pasting the result. This is a total blocker to me. I appreciate if someone can unblock me.

$ python manage.py migrate --fake-initial

Operations to perform:
  Apply all migrations: admin, auth, contenttypes, pages, sessions
Running migrations:
  Applying contenttypes.0002_remove_content_type_name...Traceback (most recent call last):

  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
psycopg2.errors.UndefinedColumn: column "name" of relation "django_content_type" does not exist


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/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/base.py", line 364, in execute
    output = self.handle(*args, **options)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/base.py", line 83, in wrapped
    res = handle_func(*args, **kwargs)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 234, in handle
    fake_initial=fake_initial,
  File "/home/shami/vkproject/vkenv/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/shami/vkproject/vkenv/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/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/migrations/executor.py", line 245, in apply_migration
    state = migration.apply(state, schema_editor)
  File "/home/shami/vkproject/vkenv/lib/python3.6/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/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/migrations/operations/fields.py", line 249, in database_forwards
    schema_editor.alter_field(from_model, from_field, to_field)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 535, in alter_field
    old_db_params, new_db_params, strict)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/postgresql/schema.py", line 124, in _alter_field
    new_db_params, strict,
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 685, in _alter_field
    params,
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 137, in execute
    cursor.execute(sql, params)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 99, in execute
    return super().execute(sql, params)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 67, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 76, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "/home/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "/home/shami/vkproject/vkenv/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/shami/vkproject/vkenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: column "name" of relation "django_content_type" does not exist
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Ram

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Dec 7, 2019, 7:09:01 PM12/7/19
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Hi,

As a next step I tried the following but the result is is same. Please let me know if you have any clue on this?

1. Deleted/Dropped 'django_content_type' table from database
2. I upgraded Django to version 3.0 from 2.2.7 in my virtual environment and ran the following commands

1. $ python manage.py migrate --fake
2. $ python manage.py migrate --fake--initial
3. $ python manage.py migrate

But I still see same error

django.db.utils.ProgrammingError: relation "django_content_type" does not exist
LINE 1: ..."."app_label", "django_content_type"."model" FROM "django_co...

Integr@te System

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Dec 8, 2019, 9:29:46 AM12/8/19
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Hi issuer,

Check if your app development in localhost whether fall into any restricted case relate to Django content type:



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Ram

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Dec 8, 2019, 10:09:05 AM12/8/19
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Thank you for the pointer. I've solved this issue few minutes back as follows.

1. Restore the database in Postgres database ( I used pgAdmin tool for this )
2. python manage.py loaddata <dumpfile.json>
3. Dropping django_migrations table from database ( I used pgAdmin tool for this )
4. python manage.py makemigrations
5. python manage.py migrate --fake
6. python manage.py migrate
7. python manage.py collectstatic
8. python manage.py runserver 0.0.0.0:8000

My server is up and running now after struggling for a week!

Best regards


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