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

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

On Sat, Nov 30, 2019 at 11:28 AM Integr@te System <datacentralize@gmail.com> wrote:

Hi issuer,

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

On Sun, Dec 1, 2019, 00:03 Ram <ram.mullapudi@gmail.com> wrote:

 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

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