我正在尝试使用Capybara附加文件。 输入元素是：
<input type="file" multiple="multiple" name="uploadfile[]" style="position: absolute; margin: 0px 0px 0px -175px; padding: 0px; width: 220px; height: 30px; font-size: 14px; opacity: 0; cursor: pointer; display: block; z-index: 2147483583; top: 3331px; left: 436px;">
附加文件的代码是：
attach_file 'uploadfile[]', '/home/user/image.jpg'
但它返回错误：
biske@biske:~/Documents/Aptana Studio 3 Workspace/AddPlace$ ruby
test.rb [remote server]
file:///tmp/webdriver-profile20130223-30353-dw596v/extensions/fxdriver@googlecode.com/components/command_processor.js:7537:in
`fxdriver.preconditions.visible': Element is not currently visible and
so may not be interacted with
(Selenium::WebDriver::Error::ElementNotVisibleError) from [remote
server]
file:///tmp/webdriver-profile20130223-30353-dw596v/extensions/fxdriver@googlecode.com/components/command_processor.js:10207:in
`DelayedCommand.prototype.checkPreconditions_' from [remote server]
file:///tmp/webdriver-profile20130223-30353-dw596v/extensions/fxdriver@googlecode.com/components/command_processor.js:10226:in
`DelayedCommand.prototype.executeInternal_/h' from [remote server]
file:///tmp/webdriver-profile20130223-30353-dw596v/extensions/fxdriver@googlecode.com/components/command_processor.js:10231:in
`DelayedCommand.prototype.executeInternal_' from [remote server]
file:///tmp/webdriver-profile20130223-30353-dw596v/extensions/fxdriver@googlecode.com/components/command_processor.js:10171:in
`DelayedCommand.prototype.execute/<' from
/usr/lib/ruby/gems/1.9.1/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/remote/response.rb:52:in
`assert_ok' from
/usr/lib/ruby/gems/1.9.1/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/remote/response.rb:15:in
`initialize' from
/usr/lib/ruby/gems/1.9.1/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/remote/http/common.rb:59:in
`new' from
/usr/lib/ruby/gems/1.9.1/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/remote/http/common.rb:59:in
`create_response' from
/usr/lib/ruby/gems/1.9.1/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/remote/http/default.rb:66:in
`request' from
/usr/lib/ruby/gems/1.9.1/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/remote/http/common.rb:40:in
`call' from
/usr/lib/ruby/gems/1.9.1/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/remote/bridge.rb:615:in
`raw_execute' from
/usr/lib/ruby/gems/1.9.1/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/remote/bridge.rb:593:in
`execute' from
/usr/lib/ruby/gems/1.9.1/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/remote/bridge.rb:400:in
`sendKeysToElement' from
/usr/lib/ruby/gems/1.9.1/gems/selenium-webdriver-2.29.0/lib/selenium/webdriver/common/element.rb:126:in
`send_keys' from
/usr/lib/ruby/gems/1.9.1/gems/capybara-2.0.2/lib/capybara/selenium/node.rb:33:in
`set' from
/usr/lib/ruby/gems/1.9.1/gems/capybara-2.0.2/lib/capybara/node/element.rb:79:in
`block in set' from
/usr/lib/ruby/gems/1.9.1/gems/capybara-2.0.2/lib/capybara/node/base.rb:78:in
`synchronize' from
/usr/lib/ruby/gems/1.9.1/gems/capybara-2.0.2/lib/capybara/node/element.rb:79:in
`set' from
/usr/lib/ruby/gems/1.9.1/gems/capybara-2.0.2/lib/capybara/node/actions.rb:144:in
`attach_file' from
/usr/lib/ruby/gems/1.9.1/gems/capybara-2.0.2/lib/capybara/session.rb:341:in
`block (2 levels) in <class:Session>' from
/usr/lib/ruby/gems/1.9.1/gems/capybara-2.0.2/lib/capybara/dsl.rb:51:in
`block (2 levels) in <module:DSL>' from test.rb:19:in `add_place'
from test.rb:11:in `run' from test.rb:33:in `<main>'
如何解决这个问题？
答案 0 :(得分：5)
attach_file('locator', 'path/to/file.jpg', :visible => false )
应该做的伎俩。 Capybara默认忽略隐藏字段，您需要做的就是传递可见性选项
答案 1 :(得分：1)
:visible选项对我没有任何作用。似乎有一个:make_visible选项：
attach_file 'uploadfile[]', '/home/user/image.jpg', :make_visible => true
或代替true，其中包含自定义样式属性的哈希值，在尝试打开文件对话框之前将设置为覆盖。
答案 2 :(得分：-3)
因为Ruby在页面加载方面不是很好，如果我是你，我会这样解决：
!30.times { if (driver.find_element(:xpath, "//input[@type='file']")rescue false) then break else sleep 1; end }
基本上上面的代码将尝试30次（每1秒）来搜索您尝试附加的元素，并且如果元素存在则将退出循环。如果需要，可以在中断后或sleep命令之后使用变量来指导流程。
祝你好运