我知道 Stackoverflow 上有与此非常相似的帖子，但我似乎仍然无法弄清楚我的尝试出了什么问题。
# login to the site
mech.get(base_URL) do |page|
l = page.form_with(:action => "/site/login/") do |f|
username_field = f.field_with(:name => "LoginForm[username]")
username_field.value = userName
password_field = f.field_with(:name => "LoginForm[password]")
password_field.value = password
f.submit
end
end
这是我的错误：
rb:18:in `block (2 levels) in <main>': undefined method `field_with' for nil:NilClass (NoMethodError)
这是 HTML
<div class="bucketbody">
<div class="form padding10">
<form id="login-form" action="/site/login" method="post">
<div class="row">
<p class="note float_right">Fields with <span class="required">*</span> are required.</p>
<label for="LoginForm_username" class="required">Email address <span class="required">*</span></label> <input class="width_66per" autofocus="" name="LoginForm[username]" id="LoginForm_username" type="text"> </div>
<div class="row">
<label for="LoginForm_password" class="required">Password <span class="required">*</span></label> <input class="width_66per" name="LoginForm[password]" id="LoginForm_password" type="password"> </div>
<div class="row rememberMe nolabel">
<span class="field"><input id="ytLoginForm_rememberMe" value="0" name="LoginForm[rememberMe]" type="hidden"><input name="LoginForm[rememberMe]" id="LoginForm_rememberMe" value="1" type="checkbox"> <label for="LoginForm_rememberMe">Remember me on this computer</label> </span>
</div>
<p class="note"><a href="http://test.XXXXXXXX.com/user/reset">Forgot your password?</a></p>
<div class="row buttons" style="padding-left: 0px;">
<input class="pushButton" name="yt0" value="Login" type="submit"> </div>
</form> </div><!-- form -->
</div>
p page
#<Mechanize::Page
{url #<URI::HTTP:0x225ce70 URL:http://xxxxxx.com/>}
{meta_refresh}
{title "xxxxxxxxxxx | xxxxxxxxx"}
{iframes}
{frames}
{links
#<Mechanize::Page::Link "\r\n " "/">
#<Mechanize::Page::Link "About xxxxxx" "/features">
#<Mechanize::Page::Link "xxxxx Overview" "/features">
#<Mechanize::Page::Link "xxxxxxx for Associations" "/associations">
#<Mechanize::Page::Link "xxxxxx For Education" "/education">
#<Mechanize::Page::Link "FAQ" "/faq">
#<Mechanize::Page::Link "About Us" "/aboutus">
#<Mechanize::Page::Link "About Us" "/aboutus">
#<Mechanize::Page::Link "News & Events" "/news-events">
#<Mechanize::Page::Link "Environmental Commitment" "/environment">
#<Mechanize::Page::Link "Our Team" "/ourteam">
#<Mechanize::Page::Link "The xxxxxxxxxx" "/xxxxxxxxxx">
#<Mechanize::Page::Link "Free Trial" "/freetrial">
#<Mechanize::Page::Link "Contact" "/contacts">
#<Mechanize::Page::Link "Contact us" "/contacts">
#<Mechanize::Page::Link
"xxxxxxxxxx"
"http://www.xxxxxxxx.com/services/web-services/">
#<Mechanize::Page::Link
"[email protected] /cdn-cgi/l/email-protection"
"mailto:[email protected] /cdn-cgi/l/email-protection">
#<Mechanize::Page::Link xxxxxx" "http://www.xxxxxxxxx.com/">
#<Mechanize::Page::Link
"Technology Association of Oregon"
"http://www.techoregon.org/">
#<Mechanize::Page::Link "" "http://www.terrapass.com/">
#<Mechanize::Page::Link "" "http://www.arborday.org/">}
{forms}>
你让它变得比需要的更复杂：
page = mech.get base_URL
form = page.form # page.forms[1], etc.
form['LoginForm[username]'] = userName
form['LoginForm[password]'] = password
l = form.submit form.button
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