Module: ActiveSupport::CoreExtensions::Array::Conversions

Included in:
Array
Defined in:
lib/active_support/core_ext/array/conversions.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(klass) ⇒ Object

:nodoc:



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# File 'lib/active_support/core_ext/array/conversions.rb', line 29

def self.included(klass) #:nodoc:
  klass.send(:alias_method, :to_default_s, :to_s)
  klass.send(:alias_method, :to_s, :to_formatted_s)
end

Instance Method Details

#to_formatted_s(format = :default) ⇒ Object 



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# File 'lib/active_support/core_ext/array/conversions.rb', line 34

def to_formatted_s(format = :default)
  case format
    when :db
      if respond_to?(:empty?) && self.empty?
        "null"
      else
        collect { |element| element.id }.join(",")
      end
    else
      to_default_s
  end
end

#to_param ⇒ Object

When an array is given to url_for, it is converted to a slash separated string.



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# File 'lib/active_support/core_ext/array/conversions.rb', line 25

def to_param
  join '/'
end

#to_sentence(options = {}) ⇒ Object

Converts the array to comma-seperated sentence where the last element is joined by the connector word. Options:

  • :connector: The word used to join the last element in arrays with two or more elements (default: “and”)

  • :skip_last_comma: Set to true to return “a, b and c” instead of “a, b, and c”.



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# File 'lib/active_support/core_ext/array/conversions.rb', line 8

def to_sentence(options = {})
  options.assert_valid_keys(:connector, :skip_last_comma)
  options.reverse_merge! :connector => 'and', :skip_last_comma => false
  
  case length
  	when 0
  		""
    when 1
      self[0]
    when 2
      "#{self[0]} #{options[:connector]} #{self[1]}"
    else
      "#{self[0...-1].join(', ')}#{options[:skip_last_comma] ? '' : ','} #{options[:connector]} #{self[-1]}"
  end
end

#to_xml(options = {}) ⇒ Object 



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# File 'lib/active_support/core_ext/array/conversions.rb', line 47

def to_xml(options = {})
  raise "Not all elements respond to to_xml" unless all? { |e| e.respond_to? :to_xml }

  options[:root]     ||= all? { |e| e.is_a?(first.class) && first.class.to_s != "Hash" } ? first.class.to_s.underscore.pluralize : "records"
  options[:children] ||= options[:root].singularize
  options[:indent]   ||= 2
  options[:builder]  ||= Builder::XmlMarkup.new(:indent => options[:indent])

  root     = options.delete(:root).to_s
  children = options.delete(:children)

  if !options.has_key?(:dasherize) || options[:dasherize]
    root = root.dasherize
  end

  options[:builder].instruct! unless options.delete(:skip_instruct)

  opts = options.merge({ :root => children })

  options[:builder].tag!(root) { each { |e| e.to_xml(opts.merge!({ :skip_instruct => true })) } }
end