Возможно, очень простой вопрос, но если делать в точности как написано в README, то при выполнении команды python3 manage.py migrate появляется нижеследующая ошибка. Никогда не работала с postgres и Django, поэтому она мне непонятна. Проверено на двух разных установках Ubuntu 20.04 и 18.04.
`Traceback (most recent call last):
File "/home/tatyana/.local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 217, in ensure_connection
self.connect()
File "/home/tatyana/.local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 195, in connect
self.connection = self.get_new_connection(conn_params)
File "/home/tatyana/.local/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 178, in get_new_connection
connection = Database.connect(**conn_params)
File "/home/tatyana/.local/lib/python3.6/site-packages/psycopg2/init.py", line 126, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: could not translate host name "postgres" to address: Name or service not known
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 21, in
main()
File "manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "/home/tatyana/.local/lib/python3.6/site-packages/django/core/management/init.py", line 381, in execute_from_command_line
utility.execute()
File "/home/tatyana/.local/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/tatyana/.local/lib/python3.6/site-packages/django/core/management/base.py", line 323, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/tatyana/.local/lib/python3.6/site-packages/django/core/management/base.py", line 364, in execute
output = self.handle(*args, **options)
File "/home/tatyana/.local/lib/python3.6/site-packages/django/core/management/base.py", line 83, in wrapped
res = handle_func(*args, **kwargs)
File "/home/tatyana/.local/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 87, in handle
executor = MigrationExecutor(connection, self.migration_progress_callback)
File "/home/tatyana/.local/lib/python3.6/site-packages/django/db/migrations/executor.py", line 18, in init
self.loader = MigrationLoader(self.connection)
File "/home/tatyana/.local/lib/python3.6/site-packages/django/db/migrations/loader.py", line 49, in init
self.build_graph()
File "/home/tatyana/.local/lib/python3.6/site-packages/django/db/migrations/loader.py", line 212, in build_graph
self.applied_migrations = recorder.applied_migrations()
File "/home/tatyana/.local/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 73, in applied_migrations
if self.has_table():
File "/home/tatyana/.local/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 56, in has_table
return self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor())
File "/home/tatyana/.local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 256, in cursor
return self._cursor()
File "/home/tatyana/.local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 233, in _cursor
self.ensure_connection()
File "/home/tatyana/.local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 217, in ensure_connection
self.connect()
File "/home/tatyana/.local/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/tatyana/.local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 217, in ensure_connection
self.connect()
File "/home/tatyana/.local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 195, in connect
self.connection = self.get_new_connection(conn_params)
File "/home/tatyana/.local/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 178, in get_new_connection
connection = Database.connect(**conn_params)
File "/home/tatyana/.local/lib/python3.6/site-packages/psycopg2/init.py", line 126, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError: could not translate host name "postgres" to address: Name or service not known
`