PG::Error: ERROR: new encoding (UTF8) is incompatible.md

Problem:

I have installed: ruby-2.0.0, PostgreSQL 9.2, now in Rails app when I execute:

  rake db:create, command I get:

PG::InvalidParameterValue: ERROR: new encoding (UTF8) is incompatible with the encoding of the template database (SQL_ASCII) HINT: Use the same encoding as in the template database, or use template0 as template. : CREATE DATABASE "my_db_name" ENCODING = 'unicode'.......

  bin/rake:16:in `load'
  bin/rake:16:in `<main>'
  Couldn't create database for {"adapter"=>"postgresql", "encoding"=>"unicode", "database"=>"my_db", "host"=>"localhost", "pool"=>5, "username"       =>"my_user", "password"=>"my_password"}

Solution

Ok, the below steps resolved the problem:

First, we need to drop template1. Templates can’t be dropped, so we first modify it so that it’s an ordinary database:

    UPDATE pg_database SET datistemplate = FALSE WHERE datname = 'template1';

Now, we can drop it:

    DROP DATABASE template1;

Now, its time to create database from template0, with a new default encoding:

    CREATE DATABASE template1 WITH TEMPLATE = template0 ENCODING = 'UNICODE';

Now, modify template1 so it’s actually a template:

    UPDATE pg_database SET datistemplate = TRUE WHERE datname = 'template1';

Now, switch to template1 and VACUUM FREEZE the template:

  \c template1
  VACUUM FREEZE;

Problem should be resolved.