Я пытаюсь восстановить производственную базу данных на своем локальном компьютере, аналогично тому, как описан рабочий процесс для Heroku (https://devcenter.heroku.com/articles/heroku-postgres-import-export). Однако я использую Aptible, который предоставляет Туннель БД для этой цели.
Используя pgAdmin4, я создал резервную копию 'Custom'. Затем, слегка изменив команду pgAdmin, я восстановил ее, используя
"/Applications/pgAdmin 4.app/Contents/SharedSupport/pg_restore" --host "localhost" --port "5432" --username "postgres" --no-password --dbname "lucy_prod" --verbose "/Users/kurtpeek/lucy-prod-backup-11-june-2018" --clean
, где ядобавлена опция --clean для удаления объектов базы данных перед их воссозданием (ср. https://www.postgresql.org/docs/9.2/static/app-pgrestore.html).
Проблема в том, что когда я сейчас пытаюсь python manage.py migrate, я получаю следующую ошибку:
(venv) Kurts-MacBook-Pro-2:lucy-web kurtpeek$ python manage.py migrate
Traceback (most recent call last):
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 62, in execute
return self.cursor.execute(sql)
psycopg2.ProgrammingError: no schema has been selected to create in
LINE 1: CREATE TABLE "django_migrations" ("id" serial NOT NULL PRIMA...
^
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 57, in ensure_schema
editor.create_model(self.Migration)
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 303, in create_model
self.execute(sql, params or None)
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 120, in execute
cursor.execute(sql, params)
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 79, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/db/utils.py", line 94, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/utils/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/db/backends/utils.py", line 62, in execute
return self.cursor.execute(sql)
django.db.utils.ProgrammingError: no schema has been selected to create in
LINE 1: CREATE TABLE "django_migrations" ("id" serial NOT NULL PRIMA...
^
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "manage.py", line 29, in <module>
execute_from_command_line(sys.argv)
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
utility.execute()
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/core/management/__init__.py", line 356, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/core/management/base.py", line 283, in run_from_argv
self.execute(*args, **cmd_options)
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/core/management/base.py", line 330, in execute
output = self.handle(*args, **options)
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 83, in handle
executor = MigrationExecutor(connection, self.migration_progress_callback)
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/db/migrations/executor.py", line 20, in __init__
self.loader = MigrationLoader(self.connection)
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/db/migrations/loader.py", line 52, in __init__
self.build_graph()
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/db/migrations/loader.py", line 209, in build_graph
self.applied_migrations = recorder.applied_migrations()
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 65, in applied_migrations
self.ensure_schema()
File "/Users/kurtpeek/Documents/Dev/lucy2/lucy-web/venv/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 59, in ensure_schema
raise MigrationSchemaMissing("Unable to create the django_migrations table (%s)" % exc)
django.db.migrations.exceptions.MigrationSchemaMissing: Unable to create the django_migrations table (no schema has been selected to create in
LINE 1: CREATE TABLE "django_migrations" ("id" serial NOT NULL PRIMA...
^
)
Из того, что я понимаю из MigrationSchemaMissing (Невозможно создать таблицу django_migrations (% s)% exc) , мне нужно запустить
grant usage on schema public to username;
grant create on schema public to username;
Однако, что я должен заполнитьдля username? Должно ли это быть postgres?
Вот еще некоторые подробности о public схеме и search_path:
(venv) Kurts-MacBook-Pro-2:lucy-web kurtpeek$ python manage.py dbshell
psql (10.4)
Type "help" for help.
lucy_prod=> \dn+ public
List of schemas
Name | Owner | Access privileges | Description
--------+----------+-------------------+------------------------
public | postgres | | standard public schema
(1 row)
lucy_prod=> SHOW search_path;
search_path
-----------------
"$user", public
(1 row)
Обновление
После запуска команды select current_user; я определил, что моего текущего пользователя зовут lucyapp, но если япопробуйте grant usage on schema public для этого пользователя я получаю сообщение об ошибке «Отказано в доступе»:
lucy_prod=> select current_user;
current_user
--------------
lucyapp
(1 row)
lucy_prod=> grant usage on schema public to lucyapp;
ERROR: permission denied for schema public
lucy_prod=> grant create on schema public to lucyapp;
ERROR: permission denied for schema public