undefined method `each' for #<String:0x00000003a27a58> - ruby-on-rails

Question

First, I do really apologize, since I'm still newbie on this.
I was trying to install Fat Free CRM by following the instruction on this following sites:
http://www.blogdugeek.fr/crm-installation-fat-free-crm-debian-squeeze/
http://guides.fatfreecrm.com/Setup-Linux-or-Mac-OS.html
As I follow the instructions, I've encounter some errors and resolved some. However, upon executing this command:
RAILS_ENV=production rake db:create db:migrate crm:settings:load
I was stuck in this command line and here are the following errors that I've been stuck with:
rake aborted!
NoMethodError: undefined method `each' for #<String:0x00000003a27a58>
/usr/local/rvm/gems/ruby-2.2.4/gems/activerecord-4.2.6/lib/active_record/connection_adapters/connection_specification.rb:150:in `resolve_all'
/usr/local/rvm/gems/ruby-2.2.4/gems/activerecord-4.2.6/lib/active_record/connection_handling.rb:69:in `resolve'
/usr/local/rvm/gems/ruby-2.2.4/gems/activerecord-4.2.6/lib/active_record/core.rb:46:in `configurations='
/usr/local/rvm/gems/ruby-2.2.4/gems/activerecord-4.2.6/lib/active_record/railties/databases.rake:5:in `block (2 levels) in <top (required)>'
/usr/local/rvm/gems/ruby-2.2.4/bin/ruby_executable_hooks:15:in `eval'
/usr/local/rvm/gems/ruby-2.2.4/bin/ruby_executable_hooks:15:in `<main>'
Tasks: TOP => db:create => db:load_config
(See full trace by running task with --trace)
As I've search for more related issue, I found some, but it's still no use.
Also, here are some data that might be needed:
Ruby Version
ruby 2.2.4p230 (2015-12-16 revision 53155) [x86_64-linux]
Rails Version
Rails 4.2.6
Here are the error lines
connection_specification.rb
def resolve(config)
if config
resolve_connection config
elsif env = ActiveRecord::ConnectionHandling::RAILS_ENV.call
resolve_symbol_connection env.to_sym
else
raise AdapterNotSpecified
end
end
# Expands each key in #configurations hash into fully resolved hash
def resolve_all
config = configurations.dup
config.each do |key, value| <---- Error line
config[key] = resolve(value) if value
end
config
end
connection_handling.rb
class MergeAndResolveDefaultUrlConfig # :nodoc:
def initialize(raw_configurations)
#raw_config = raw_configurations.dup
#env = DEFAULT_ENV.call.to_s
end
# Returns fully resolved connection hashes.
# Merges connection information from `ENV['DATABASE_URL']` if available.
def resolve
Error line ----> ConnectionAdapters::ConnectionSpecification::Resolver.new(config).resolve_all
end
private
def config
#raw_config.dup.tap do |cfg|
if url = ENV['DATABASE_URL']
cfg[#env] ||= {}
cfg[#env]["url"] ||= url
end
end
end
core.rb
def self.configurations=(config)
Error line ---> ##configurations = ActiveRecord::ConnectionHandling::MergeAndResolveDefaultUrlConfig.new(config).resolve
end
self.configurations = {}
# Returns fully resolved configurations hash
def self.configurations
##configurations
end
databases.rake
db_namespace = namespace :db do task :load_config do
Error line ----> ActiveRecord::Base.configurations = ActiveRecord::Tasks::DatabaseTasks.database_configuration || {}
ActiveRecord::Migrator.migrations_paths = ActiveRecord::Tasks::DatabaseTasks.migrations_paths
Here's the config/database.yml file.
# MySQL. Versions 4.1 and 5.0 are recommended.
#
# Install the MySQL driver:
# gem install mysql2
#
# And be sure to use new-style password hashing:
# http://dev.mysql.com/doc/refman/5.0/en/old-client.html
#------------------------------------------------------------------------------
development:&development
adapter:mysql2
encoding:utf8
database:fat_free_crm_development
pool:5
username:root
# password:
socket:/var/run/mysqld/mysqld.sock
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
<<: *development
database: fat_free_crm_test
production:
adapter: mysql
encoding: utf8
database: fat_free_crm_production
pool: 5
username: root
password:
socket: /var/run/mysqld/mysqld.sock
socket: /tmp/mysql.sock
staging:
<<: *development
database: fat_free_crm_staging
Hope to hear and seek some advises and learning.
If there's need some more information, let me know.
Thanks,

Answer 1

Your database.yml is the problem. YAML requires a separator between the key and data.
So not like this:
production:
adapter:mysql
encoding:utf8
...
But like this:
production:
adapter: mysql
encoding: utf8
...
You need to correct all the lines in the file, because you have this error everywhere.

Answer 2

Check the database.yml file again. Don't add anything
ie the file format must be correct.
had unkowngly comment a line on to that was causing the error.