Rails Typecase from string to boolean

ruby.rb

# Rails 5
ActiveModel::Type::Boolean.new.cast('t')     # => true
ActiveModel::Type::Boolean.new.cast('true')  # => true
ActiveModel::Type::Boolean.new.cast(true)    # => true
ActiveModel::Type::Boolean.new.cast('1')     # => true
ActiveModel::Type::Boolean.new.cast('f')     # => false
ActiveModel::Type::Boolean.new.cast('0')     # => false
ActiveModel::Type::Boolean.new.cast('false') # => false
ActiveModel::Type::Boolean.new.cast(false)   # => false
ActiveModel::Type::Boolean.new.cast(nil)     # => nil

# Rails 4.2
ActiveRecord::Type::Boolean.new.type_cast_from_database(value)

# Rails 4.1 and bellow
ActiveRecord::ConnectionAdapters::Column.value_to_boolean 'f'  # => false
ActiveRecord::ConnectionAdapters::Column.value_to_boolean 't'  # => true
ActiveRecord::ConnectionAdapters::Column.value_to_boolean '0'  # => false
ActiveRecord::ConnectionAdapters::Column.value_to_boolean '1'  # => true
ActiveRecord::ConnectionAdapters::Column.value_to_boolean nil  # => false