我无法使用 elixir 连接到 postgres:
** (Mix) The database for PhoenixChat.Repo couldn't be created: FATAL 28P01 (invalid_password): password authentication failed for user "postgres"
00:08:59.053 [error] GenServer #PID<0.3214.0> terminating
** (Postgrex.Error) FATAL 28P01 (invalid_password): password authentication failed for user "postgres"
(db_connection) lib/db_connection/connection.ex:148: DBConnection.Connection.connect/2
(connection) lib/connection.ex:622: Connection.enter_connect/5
(stdlib) proc_lib.erl:247: :proc_lib.init_p_do_apply/3
Last message: nil
State: Postgrex.Protocol
我无法理解数据库如何允许在没有超级用户的情况下创建用户。从我的普通用户那里,它不允许赋予超级用户角色:
$ psql -U thisone --password
Password for user thisone:
psql: FATAL: Peer authentication failed for user "thisone"
$ psql -U fakeuser
psql: FATAL: Peer authentication failed for user "fakeuser"
cchilders=> alter user postgres superuser;
ERROR: must be superuser to alter superusers
cchilders=> select rolname from pg_roles;
rolname
-----------
postgres
cchilders
fakeuser
thisone
(4 rows)
$ psql -U postgres --password
Password for user postgres:
psql: FATAL: Peer authentication failed for user "postgres"
如果没有超级用户,如何在 postgres 中给用户超级用户?