我正在关注https://phoenixframework.readme.io/docs/up-and-running上的Phoenix Up＆Running指南 当我尝试使用ecto创建数据库（Postgresql）时，出现以下错误
mix ecto.create
17:55:35.631 [error] GenServer #PID<0.215.0> terminating
** (RuntimeError) Connect raised a CaseClauseError error. The exception details are hidden, as they may contain sensitive data such
as database credentials.
(postgrex 0.12.2) lib/postgrex/utils.ex:40: Postgrex.Utils.parse_version/1
(postgrex 0.12.2) lib/postgrex/protocol.ex:497: Postgrex.Protocol.bootstrap_send/4
(postgrex 0.12.2) lib/postgrex/protocol.ex:353: Postgrex.Protocol.handshake/2
(db_connection 1.1.3) lib/db_connection/connection.ex:135: DBConnection.Connection.connect/2
(connection 1.0.4) lib/connection.ex:622: Connection.enter_connect/5
(stdlib 3.11.2) proc_lib.erl:249: :proc_lib.init_p_do_apply/3
Last message: nil
State: Postgrex.Protocol
** (Mix) The database for HelloPhoenix.Repo couldn't be created: an exception was raised:
** (RuntimeError) Connect raised a CaseClauseError error. The exception details are hidden, as they may contain sensitive data such
as database credentials.
(postgrex 0.12.2) lib/postgrex/utils.ex:40: Postgrex.Utils.parse_version/1
(postgrex 0.12.2) lib/postgrex/protocol.ex:497: Postgrex.Protocol.bootstrap_send/4
(postgrex 0.12.2) lib/postgrex/protocol.ex:353: Postgrex.Protocol.handshake/2
(db_connection 1.1.3) lib/db_connection/connection.ex:135: DBConnection.Connection.connect/2
(connection 1.0.4) lib/connection.ex:622: Connection.enter_connect/5
(stdlib 3.11.2) proc_lib.erl:249: :proc_lib.init_p_do_apply/3
我发现的唯一建议是更新Postgrex。我运行了mix deps.update postgrex，但并没有解决。
最后，我检查了config / dev.exs并将用户名/密码设置为“ postgres”。我使用PgAdmin3确认这是有效的登录名。
所以我现在被困住了。
Ubuntu 19.10
postgres (PostgreSQL) 11.7 (Ubuntu 11.7-0ubuntu0.19.10.1)
installed from Ubuntu repo via apt-get
答案 0 :(得分：0)
的是什么版本 Postgress和postgrex？