mix ecto.create connection refused

问题:

I received this error when trying to run mix 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

回答1:

You must make sure that the postgresql server is running. The easiest way to this on mac OS X is through brew.

Run the command brew services start postgresql and you should see the result:

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

回答2:

do you have Postgres locally installed in your machine? This error mostly comes when you don't have Postgres installed.

Use these commands to install Postgres

sudo apt-get update sudo apt-get install postgresql postgresql-contrib