mechanize:Mechanize::Form#has_field?, #has_key?
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:0xb74dc594 ... >> page = agent.get('http://127.0.0.1:8080/test10_form.html') => #<Mechanize::Page {url #<URI::HTTP:0xb74d8cdc 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:0xb74d0258 @name="text1", @node= #(Element:0x..fdba681fe { name = "input", attributes = [ #(Attr:0x..fdba66804 { name = "type", value = "text" }), #(Attr:0x..fdba667fa { name = "name", value = "text1" })] }), @value=""> #<Mechanize::Form::Hidden:0xb74d008c @name="hidden1", @node= #(Element:0x..fdba681ae { name = "input", attributes = [ #(Attr:0x..fdba6531e { name = "type", value = "hidden" }), #(Attr:0x..fdba65314 { name = "name", value = "hidden1" })] }), @value=""> #<Mechanize::Form::Field:0xb74cf920 @name="textarea1", @node= #(Element:0x..fdba67ccc { name = "textarea", attributes = [ #(Attr:0x..fdba63e6a { name = "name", value = "textarea1" }), #(Attr:0x..fdba63e60 { name = "rows", value = "4" }), #(Attr:0x..fdba63e56 { 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:0xb74d0258 @name="text1", @node= #(Element:0x..fdba681fe { name = "input", attributes = [ #(Attr:0x..fdba66804 { name = "type", value = "text" }), #(Attr:0x..fdba667fa { name = "name", value = "text1" })] }), @value=""> #<Mechanize::Form::Hidden:0xb74d008c @name="hidden1", @node= #(Element:0x..fdba681ae { name = "input", attributes = [ #(Attr:0x..fdba6531e { name = "type", value = "hidden" }), #(Attr:0x..fdba65314 { name = "name", value = "hidden1" })] }), @value=""> #<Mechanize::Form::Field:0xb74cf920 @name="textarea1", @node= #(Element:0x..fdba67ccc { name = "textarea", attributes = [ #(Attr:0x..fdba63e6a { name = "name", value = "textarea1" }), #(Attr:0x..fdba63e60 { name = "rows", value = "4" }), #(Attr:0x..fdba63e56 { name = "cols", value = "40" })], children = [ #(Text "foo")] }), @value="foo">} {radiobuttons} {checkboxes} {file_uploads} {buttons}> >> f.has_field?("text1") => true >> f.has_field?("text") => false >> f.has_field?("hidden1") => true >> f.has_field?("textarea1") => true >> f.has_key?("text1") => true