混合ecto.create拒绝连接

Question

尝试运行混合ecto.create

13:27:47.442 [error] GenServer #PID<0.3189.0> terminating 
** (DBConnection.ConnectionError) tcp connect (localhost:5432):connection refused - :econnrefused 
(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 
** (Mix) The database for Hello.Repo couldn't be created: an exception was raised: 
** (DBConnection.ConnectionError) tcp connect (localhost:5432): connection refused - :econnrefused 
    (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 

Answer 1

你必须确保PostgreSQL服务器运行时收到此错误。在Mac OS X上最简单的方法是通过brew。

运行命令brew services start postgresql，你应该看到的结果是：

==> Successfully started postgresql (label: homebrew.mxcl.postgresql)