Module: GNestedSelect::ViewHelpers

Defined in:
lib/g_nested_select/view_helpers.rb

Instance Method Summary collapse

Instance Method Details

#g_nested_select(form, field, *args) ⇒ Object 



4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/g_nested_select/view_helpers.rb', line 4

def g_nested_select( form, field, *args )
  options = args.extract_options!
  raise "You must include a 'parent_id' option for a nested select to render" unless options.has_key?( :parent_id )
  options[:class] ||= ''
  options[:ajax] ||= false
  options[:mapping_type] ||= :lookup
  options[:selected_value] = form.object.send( field.to_sym )
  select_options = Hash.new
  select_options[:include_blank] = (options.delete( :include_blank ) || false)
  klass = form.object.class.name.underscore
  options[:id] ||= "#{klass}_#{field.to_s}"
  html = ''

  Guilded::Guilder.instance.add( :nested_select, options, ['jquery/jquery-nested_select.min.js'] )

  if options.has_key?( :collection )
    collection = options.delete( :collection )
    html << form.select( field, collection, select_options )
  elsif options.has_key?( :mappings )
    mappings = options.delete( :mappings )
    html << "<select name=\"#{klass}[#{field.to_s}]\" id=\"#{klass}_#{field.to_s}\" class=\"#{options[:class].to_s}\">"
    html << "<option value=\"\"></option>" if select_options[:include_blank]
    html << grouped_options_for_select( mappings, options[:selected_value] )
    html << "</select>"      

    if options[:mapping_type].to_s == 'lookup'
      options[:mappings] = mappings.to_json
    elsif options[:mapping_type].to_s == 'html'
      html_mappings = Hash.new
      mappings.each { |key, mapping| html_mappings[key] = options_for_select( mapping ) }
      options[:mappings] = html_mappings.to_json
    else
      raise "The g_nested_select's 'mapping_type' option's value is not valid.  Please specify on of 'lookup' or 'html.'"
    end
  else
    throw "You must include either a 'collection' or 'mappings' option to render a g_nested_select"
  end

  return html
end