Upgrade from 1.17.0 to 2.0.0 fails - psycopg2.errors.FeatureNotSupported: cannot alter type of a column used by a view or rule

Impacted versions 1.17.0 / 2.0.0

• OS Type: Ubuntu
• OS Version: 20.04 LTS
• Database Type: PostgreSQL
• Database version: 12.10
• Modoboa: 1.17.0 /2.0.0
• installer used: Yes
• Webserver: Nginx

Steps to reproduce

Following upgrade instructions:

sudo -u modoboa -i
bash
source instance/bin/activate
(env) pip install modoboa==2.0.0
(env) cd instance
(env) python manage.py migrate

Current behavior

(env) $ python manage.py migrate
Operations to perform:
  Apply all migrations: admin, auth, authtoken, contenttypes, core, dnstools, lib, limits, maillog, modoboa_amavis, modoboa_contacts, modoboa_dmarc, modoboa_postfix_autoreply, modoboa_radicale, otp_static, otp_totp, relaydomains, reversion, sessions, sites, transport
Running migrations:
  Applying admin.0020_auto_20210130_2226...Traceback (most recent call last):
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
psycopg2.errors.FeatureNotSupported: cannot alter type of a column used by a view or rule
DETAIL:  rule _RETURN on view dkim depends on column "name"


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 "/srv/modoboa/env/lib/python3.8/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/core/management/__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/core/management/base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/core/management/base.py", line 364, in execute
    output = self.handle(*args, **options)
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/core/management/base.py", line 83, in wrapped
    res = handle_func(*args, **kwargs)
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/core/management/commands/migrate.py", line 232, in handle
    post_migrate_state = executor.migrate(
  File "/srv/modoboa/env/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 "/srv/modoboa/env/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 "/srv/modoboa/env/lib/python3.8/site-packages/django/db/migrations/executor.py", line 245, in apply_migration
    state = migration.apply(state, schema_editor)
  File "/srv/modoboa/env/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 "/srv/modoboa/env/lib/python3.8/site-packages/django/db/migrations/operations/fields.py", line 249, in database_forwards
    schema_editor.alter_field(from_model, from_field, to_field)
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/db/backends/base/schema.py", line 534, in alter_field
    self._alter_field(model, old_field, new_field, old_type, new_type,
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/db/backends/postgresql/schema.py", line 122, in _alter_field
    super()._alter_field(
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/db/backends/base/schema.py", line 680, in _alter_field
    self.execute(
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/db/backends/base/schema.py", line 137, in execute
    cursor.execute(sql, params)
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/db/backends/utils.py", line 67, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/db/backends/utils.py", line 76, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/db/utils.py", line 89, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/srv/modoboa/env/lib/python3.8/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
django.db.utils.NotSupportedError: cannot alter type of a column used by a view or rule
DETAIL:  rule _RETURN on view dkim depends on column "name"

Expected behavior

Migrate completes successfully.

Video/Screenshot link (optional)

N/A

[tonioo]

@Yanonix I pushed a fix in the installer repo

[tonioo]

@nexusgoblin Looks like we need to update the documentation