def default_hash(env = ActiveRecord::ConnectionHandling::DEFAULT_ENV.call.to_s)
      default = find_db_config(env)
      default.config if default
    end
def default_hash(env = ActiveRecord::ConnectionHandling::DEFAULT_ENV.call.to_s)
      default = find_db_config(env)
      default.config if default
    end
Returns the config hash that corresponds with the environment

 If the application has multiple databases +default_hash+ will
 return the first config hash for the environment.

   { database: "my_db", adapter: "mysql2" }