mechanize：Mechanize::Form::MultiSelectList#selected_options

everyday Ruby

以下のような HTML で

<html>
<head>
<title>form test</title>
</head>
<body>

<form method="get" action="cgi/foo00.cgi" name="form1">
  <select name="select1">
    <option>1</option>
    <option>2</option>
  </select>
  <select name="select2" multiple>
    <option>foo</option>
    <option>bar</option>
  </select>
</form>

</body>
</html>
>> require 'mechanize'
=> true
>> agent = Mechanize.new
=> #<Mechanize:0xb74ab5ac ...
>> page = agent.get('http://127.0.0.1:8080/test20_select.html')
=> #<Mechanize::Page
  ...
>> f = page.form('form1')
=> #<Mechanize::Form
  ...
>> f.fields[1].query_value
=> []
>> f.fields[1].selected_options
=> []
>> f.fields[1].value = 'foo'
=> "foo"
>> f.fields[1].selected_options
=> [#<Mechanize::Form::Option:0xb749d934 @select_list=#<Mechanize::Form::MultiSelectList:0xb749dc04 @options=[#<Mechanize::Form::Option:0xb749d934 ...>, #<Mechanize::Form::Option:0xb749d880 @select_list=#<Mechanize::Form::MultiSelectList:0xb749dc04 ...>, @selected=false, @text="bar", @value="bar">], @name="select2", @value=[], @node=#<Nokogiri::XML::Element:0x..fdba4ee3e name="select" attributes=[#<Nokogiri::XML::Attr:0x..fdba4a276 name="name" value="select2">, #<Nokogiri::XML::Attr:0x..fdba4a26c name="multiple" value="multiple">] children=[#<Nokogiri::XML::Element:0x..fdba4ece0 name="option" children=[#<Nokogiri::XML::Text:0x..fdba4910a "foo">]>, #<Nokogiri::XML::Element:0x..fdba4ecae name="option" children=[#<Nokogiri::XML::Text:0x..fdba48980 "bar">]>]>>, @selected=true, @text="foo", @value="foo">]
>> f.fields[1].value = 'bar'
=> "bar"
>> f.fields[1].selected_options
=> [#<Mechanize::Form::Option:0xb749d880 @select_list=#<Mechanize::Form::MultiSelectList:0xb749dc04 @options=[#<Mechanize::Form::Option:0xb749d934 @select_list=#<Mechanize::Form::MultiSelectList:0xb749dc04 ...>, @selected=false, @text="foo", @value="foo">, #<Mechanize::Form::Option:0xb749d880 ...>], @name="select2", @value=[], @node=#<Nokogiri::XML::Element:0x..fdba4ee3e name="select" attributes=[#<Nokogiri::XML::Attr:0x..fdba4a276 name="name" value="select2">, #<Nokogiri::XML::Attr:0x..fdba4a26c name="multiple" value="multiple">] children=[#<Nokogiri::XML::Element:0x..fdba4ece0 name="option" children=[#<Nokogiri::XML::Text:0x..fdba4910a "foo">]>, #<Nokogiri::XML::Element:0x..fdba4ecae name="option" children=[#<Nokogiri::XML::Text:0x..fdba48980 "bar">]>]>>, @selected=true, @text="bar", @value="bar">]
>> f.fields[1].value = ['foo', 'bar']
=> ["foo", "bar"]
>> f.fields[1].selected_options
=> [#<Mechanize::Form::Option:0xb749d934 @select_list=#<Mechanize::Form::MultiSelectList:0xb749dc04 @options=[#<Mechanize::Form::Option:0xb749d934 ...>, #<Mechanize::Form::Option:0xb749d880 @select_list=#<Mechanize::Form::MultiSelectList:0xb749dc04 ...>, @selected=true, @text="bar", @value="bar">], @name="select2", @value=[], @node=#<Nokogiri::XML::Element:0x..fdba4ee3e name="select" attributes=[#<Nokogiri::XML::Attr:0x..fdba4a276 name="name" value="select2">, #<Nokogiri::XML::Attr:0x..fdba4a26c name="multiple" value="multiple">] children=[#<Nokogiri::XML::Element:0x..fdba4ece0 name="option" children=[#<Nokogiri::XML::Text:0x..fdba4910a "foo">]>, #<Nokogiri::XML::Element:0x..fdba4ecae name="option" children=[#<Nokogiri::XML::Text:0x..fdba48980 "bar">]>]>>, @selected=true, @text="foo", @value="foo">, #<Mechanize::Form::Option:0xb749d880 @select_list=#<Mechanize::Form::MultiSelectList:0xb749dc04 @options=[#<Mechanize::Form::Option:0xb749d934 @select_list=#<Mechanize::Form::MultiSelectList:0xb749dc04 ...>, @selected=true, @text="foo", @value="foo">, #<Mechanize::Form::Option:0xb749d880 ...>], @name="select2", @value=[], @node=#<Nokogiri::XML::Element:0x..fdba4ee3e name="select" attributes=[#<Nokogiri::XML::Attr:0x..fdba4a276 name="name" value="select2">, #<Nokogiri::XML::Attr:0x..fdba4a26c name="multiple" value="multiple">] children=[#<Nokogiri::XML::Element:0x..fdba4ece0 name="option" children=[#<Nokogiri::XML::Text:0x..fdba4910a "foo">]>, #<Nokogiri::XML::Element:0x..fdba4ecae name="option" children=[#<Nokogiri::XML::Text:0x..fdba48980 "bar">]>]>>, @selected=true, @text="bar", @value="bar">]