Question

我正在尝试在Watir中选择并打印动态对象的文本。每次生成对象时，它都是随机字符串。不确定如何指向该对象。

<dd itemprop="trait">
text
</dd>

我尝试使用xpath并指向itemprop属性，但是当我运行它时程序就会出错。不确定使用xpath是否不可能或者我的代码是不正确的。

def read_dd_itemprop(trait)
    itemprop_text = @@browser.element(:xpath, "//dd[@itemprop='" + trait + "')]").text
    p itemprop_text
end

堆栈跟踪：

  The given selector //dd[@itemprop='trait')] is either invalid or does not result in a WebElement. The following error occurred:
  InvalidSelectorError: Unable to locate an element with the xpath expression //dd[@itemprop='trait')] because of the following error:
  [Exception... "The expression is not a legal expression."  code: "12" nsresult: "0x805b0033 (SyntaxError)"  location: "file:///var/folders/bv/4z13hkpn095bytggxzrx4l9h0000gp/T/webdriver-profile20130715-7256-ihkq92/extensions/fxdriver@googlecode.com/components/driver_component.js Line: 5773"] (Selenium::WebDriver::Error::InvalidSelectorError)
  [remote server] file:///var/folders/bv/4z13hkpn095bytggxzrx4l9h0000gp/T/webdriver-profile20130715-7256-ihkq92/extensions/fxdriver@googlecode.com/components/driver_component.js:8379:in `FirefoxDriver.annotateInvalidSelectorError_'
  [remote server] file:///var/folders/bv/4z13hkpn095bytggxzrx4l9h0000gp/T/webdriver-profile20130715-7256-ihkq92/extensions/fxdriver@googlecode.com/components/driver_component.js:8410:in `FirefoxDriver.prototype.findElementInternal_'
  [remote server] file:///var/folders/bv/4z13hkpn095bytggxzrx4l9h0000gp/T/webdriver-profile20130715-7256-ihkq92/extensions/fxdriver@googlecode.com/components/driver_component.js:8414:in `FirefoxDriver.prototype.findElement'
  [remote server] file:///var/folders/bv/4z13hkpn095bytggxzrx4l9h0000gp/T/webdriver-profile20130715-7256-ihkq92/extensions/fxdriver@googlecode.com/components/command_processor.js:10421:in `DelayedCommand.prototype.executeInternal_/h'
  [remote server] file:///var/folders/bv/4z13hkpn095bytggxzrx4l9h0000gp/T/webdriver-profile20130715-7256-ihkq92/extensions/fxdriver@googlecode.com/components/command_processor.js:10426:in `DelayedCommand.prototype.executeInternal_'

我关门了吗？这是一种合理的方法，还是我应该采取不同的角度？

Answer 1

你有一个额外的括号“）”。

itemprop_text = @@browser.element(:xpath, "//dd[@itemprop='" + object + "']").text

另请注意，我希望xpath为//dd[@itemprop='the value of object']，而不是//dd[@itemprop='object']。请检查object的值是否正确，例如，应该是“特征”。

在Watir中读取动态对象的文本

1 个答案: