Method: ApplicationHelper#html_options

Defined in:
app/helpers/application_helper.rb

#html_options(container, selected = nil) ⇒ Object

Accepts a container (hash, array, enumerable, your type) and returns a string of option tags. Given a container where the elements respond to first and last (such as a two-element array), the “lasts” serve as option values and the “firsts” as option text. Hashes are turned into this form automatically, so the keys become “firsts” and values become lasts. If selected is specified, the matching “last” or element will get the selected option-tag.

Examples (call, result):

html_options([["Dollar", "$"], ["Kroner", "DKK"]])
  <option value="$">Dollar</option>\n<option value="DKK">Kroner</option>

html_options([ "VISA", "Mastercard" ], "Mastercard")
  <option>VISA</option>\n<option selected>Mastercard</option>

html_options({ "Basic" => "$20", "Plus" => "$40" }, "$40")
  <option value="$20">Basic</option>\n<option value="$40" selected>Plus</option>



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# File 'app/helpers/application_helper.rb', line 18

def html_options(container, selected = nil)
  container = container.to_a if Hash === container

  html_options = container.inject([]) do |options, element| 
    if element.respond_to?(:first) && element.respond_to?(:last)
      if element.last != selected
        options << "<option value=\"#{element.last}\">#{element.first}</option>"
      else
        options << "<option value=\"#{element.last}\" selected>#{element.first}</option>"
      end
    else
      options << ((element != selected) ? "<option>#{element}</option>" : "<option selected>#{element}</option>")
    end
  end
  
  html_options.join("\n")
end