Flowdock
method

grouped_options_for_select

Importance_3
Ruby on Rails latest stable (v4.0.2) - 0 notes - Class: ActionView::Helpers::FormOptionsHelper
grouped_options_for_select(grouped_options, selected_key = nil, options = {}) public

Returns a string of <option> tags, like options_for_select, but wraps them with <optgroup> tags.

Parameters:

  • grouped_options - Accepts a nested array or hash of strings. The first value serves as the <optgroup> label while the second value must be an array of options. The second value can be a nested array of text-value pairs. See options_for_select for more info.

    Ex. ["North America",[["United States","US"],["Canada","CA"]]]
    
  • selected_key - A value equal to the value attribute for one of the <option> tags, which will have the selected attribute set. Note: It is possible for this value to match multiple options as you might have the same option in multiple groups. Each will then get selected="selected".

Options:

  • :prompt - set to true or a prompt string. When the select element doesn’t have a value yet, this prepends an option with a generic prompt - “Please select” - or the given prompt string.

  • :divider - the divider for the options groups.

    grouped_options = [

    ['North America',
      [['United States','US'],'Canada']],
    ['Europe',
      ['Denmark','Germany','France']]
    

    ] grouped_options_for_select(grouped_options)

    grouped_options = {

    'North America' => [['United States','US'], 'Canada'],
    'Europe' => ['Denmark','Germany','France']
    

    } grouped_options_for_select(grouped_options)

Possible output:

<optgroup label="North America">
  <option value="US">United States</option>
  <option value="Canada">Canada</option>
</optgroup>
<optgroup label="Europe">
  <option value="Denmark">Denmark</option>
  <option value="Germany">Germany</option>
  <option value="France">France</option>
</optgroup>

grouped_options = [
  [['United States','US'], 'Canada'],
  ['Denmark','Germany','France']
]
grouped_options_for_select(grouped_options, nil, divider: '---------')

Possible output:

<optgroup label="---------">
  <option value="US">United States</option>
  <option value="Canada">Canada</option>
</optgroup>
<optgroup label="---------">
  <option value="Denmark">Denmark</option>
  <option value="Germany">Germany</option>
  <option value="France">France</option>
</optgroup>

Note: Only the <optgroup> and <option> tags are returned, so you still have to wrap the output in an appropriate <select> tag.

Show source
Register or log in to add new notes.