java - Selenium : stale element reference: element is not attached to the page document

Question

我面临陈旧元素异常的问题。我已经用谷歌搜索并在 stackoverflow 中找到了一些答案，但都不起作用。我发现当 DOM 元素被销毁并再次创建时会发生此异常。这里我的场景是我有一个包含记录的表，并且下面有一个文本，如下所示，“显示 6 行中的 1 到 6 行”。当我点击刷新按钮时，出现此异常。

String recordsBeforeRefresh = getRecordsCountFromTable(waitForElement(By.xpath(properties.getProperty("RefreshPage.Icon"))).getText());

        clickElement(By.xpath(properties.getProperty("RefreshPage.Button")), "Refresh");

        String recordsAfterRefresh = getRecordsCountFromTable(waitForElement(By.xpath(properties.getProperty("RefreshPage.Icon"))).getText());

        if(recordsBeforeRefresh.equals(recordsAfterRefresh))
        {
            return true;
        }
        else
        {
            return false;
        }

waitforElement 在另一个这样的类中

protected WebElement waitForElement(final By fieldLocator) {
        return waitForElement(fieldLocator, 30);
    }

protected WebElement waitForElement(final By fieldLocator, int timeoutSeconds) {

    Wait<WebDriver> wait = new FluentWait<WebDriver>(getDriver()).withTimeout(timeoutSeconds, TimeUnit.SECONDS)
            .pollingEvery(5, TimeUnit.SECONDS).ignoring(NoSuchElementException.class);

    WebElement field = null;
    try {
        field = wait.until(new Function<WebDriver, WebElement>() {

            @Override
            public WebElement apply(WebDriver driver) {
                return driver.findElement(fieldLocator);
            }

        });
    } catch (Throwable t) {
        throw new AutomationError(t);
    }

    return field;
}

getRecordsCountFromTable(String) 有正则表达式模式匹配方法来获取记录总数。

请帮忙...

堆栈跟踪:

stale element reference: element is not attached to the page document
  (Session info: chrome=47.0.2526.106)
  (Driver info: chromedriver=2.20.353145 (343b531d31eeb933ec778dbcf7081628a1396067),platform=Windows NT 6.3 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 137 milliseconds
For documentation on this error, please visit: http://seleniumhq.org/exceptions/stale_element_reference.html
Build info: version: '2.48.2', revision: '41bccdd10cf2c0560f637404c2d96164b67d9d67', time: '2015-10-09 13:08:06'
System info: host: '7YYCXY1', ip: '10.101.121.23', os.name: 'Windows 8.1', os.arch: 'amd64', os.version: '6.3', java.version: '1.8.0_25'
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities [{applicationCacheEnabled=false, rotatable=false, mobileEmulationEnabled=false, chrome={userDataDir=C:\Users\LSANAP~1\AppData\Local\Temp\scoped_dir6484_22708}, takesHeapSnapshot=true, databaseEnabled=false, handlesAlerts=true, hasTouchScreen=false, version=47.0.2526.106, platform=WIN8_1, browserConnectionEnabled=false, nativeEvents=true, acceptSslCerts=true, locationContextEnabled=true, webStorageEnabled=true, browserName=chrome, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true}]
Session ID: dd9a7e9b7d9d0f51a61f8075ed7bd843

错误出现在 String afterrefresh 行...

Answer 1

@Lokesh S，您可以尝试以下步骤，最有可能使其发挥作用:

第 1 步:单击“刷新”或执行操作
第 2 步:使用元素上的显式等待来等待元素显示
步骤 3:再次执行 findElement，抛出 StaleElementException。