mechanize：Mechanize::Form#field_with, #field

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">
  <input type="text" name="text1" />
  <input type="hidden" name="hidden1" />
  <textarea name="textarea1" rows="4" cols="40">foo</textarea>
</form>

</body>
</html>
>> require 'mechanize'
=> true
>> agent = Mechanize.new
=> #<Mechanize:0xb74e4604 ...
>> page = agent.get('http://127.0.0.1:8080/test10_form.html')
=> #<Mechanize::Page
 {url #<URI::HTTP:0xb74e0d4c URL:http://127.0.0.1:8080/test10_form.html>}
 {meta}
 {title "form test"}
 {iframes}
 {frames}
 {links}
 {forms
  #<Mechanize::Form
   {name "form1"}
   {method "GET"}
   {action "cgi/foo00.cgi"}
   {fields
    #<Mechanize::Form::Text:0xb74d82c8
     @name="text1",
     @node=
      #(Element:0x..fdba6c236 {
        name = "input",
        attributes = [
          #(Attr:0x..fdba6a83c { name = "type", value = "text" }),
          #(Attr:0x..fdba6a832 { name = "name", value = "text1" })]
        }),
     @value="">
    #<Mechanize::Form::Hidden:0xb74d80fc
     @name="hidden1",
     @node=
      #(Element:0x..fdba6c1e6 {
        name = "input",
        attributes = [
          #(Attr:0x..fdba69356 { name = "type", value = "hidden" }),
          #(Attr:0x..fdba6934c { name = "name", value = "hidden1" })]
        }),
     @value="">
    #<Mechanize::Form::Field:0xb74d7990
     @name="textarea1",
     @node=
      #(Element:0x..fdba6bd04 {
        name = "textarea",
        attributes = [
          #(Attr:0x..fdba67ea2 { name = "name", value = "textarea1" }),
          #(Attr:0x..fdba67e98 { name = "rows", value = "4" }),
          #(Attr:0x..fdba67e8e { name = "cols", value = "40" })],
        children = [ #(Text "foo")]
        }),
     @value="foo">}
   {radiobuttons}
   {checkboxes}
   {file_uploads}
   {buttons}>}>

>> f = page.form('form1')
=> #<Mechanize::Form
 {name "form1"}
 {method "GET"}
 {action "cgi/foo00.cgi"}
 {fields
  #<Mechanize::Form::Text:0xb74d82c8
   @name="text1",
   @node=
    #(Element:0x..fdba6c236 {
      name = "input",
      attributes = [
        #(Attr:0x..fdba6a83c { name = "type", value = "text" }),
        #(Attr:0x..fdba6a832 { name = "name", value = "text1" })]
      }),
   @value="">
  #<Mechanize::Form::Hidden:0xb74d80fc
   @name="hidden1",
   @node=
    #(Element:0x..fdba6c1e6 {
      name = "input",
      attributes = [
        #(Attr:0x..fdba69356 { name = "type", value = "hidden" }),
        #(Attr:0x..fdba6934c { name = "name", value = "hidden1" })]
      }),
   @value="">
  #<Mechanize::Form::Field:0xb74d7990
   @name="textarea1",
   @node=
    #(Element:0x..fdba6bd04 {
      name = "textarea",
      attributes = [
        #(Attr:0x..fdba67ea2 { name = "name", value = "textarea1" }),
        #(Attr:0x..fdba67e98 { name = "rows", value = "4" }),
        #(Attr:0x..fdba67e8e { name = "cols", value = "40" })],
      children = [ #(Text "foo")]
      }),
   @value="foo">}
 {radiobuttons}
 {checkboxes}
 {file_uploads}
 {buttons}>

>> f.field_with(:value => //)
=> #<Mechanize::Form::Text:0xb74d82c8 @name="text1", @value="", @node=#<Nokogiri::XML::Element:0x..fdba6c236 name="input" attributes=[#<Nokogiri::XML::Attr:0x..fdba6a83c name="type" value="text">, #<Nokogiri::XML::Attr:0x..fdba6a832 name="name" value="text1">]>>
>> f.field_with(:value => "a")
=> nil
>> f.field(:value => //)
=> #<Mechanize::Form::Text:0xb74d82c8 @name="text1", @value="", @node=#<Nokogiri::XML::Element:0x..fdba6c236 name="input" attributes=[#<Nokogiri::XML::Attr:0x..fdba6a83c name="type" value="text">, #<Nokogiri::XML::Attr:0x..fdba6a832 name="name" value="text1">]>>