Not able to click Checkbox Element using Python Selenium integration

[Vipul Garg]

I am trying to iterate over pages having a Campaigns Programs List and then I have to select checkbox defined in an image below in order to get the run length of a loop on-page.

But when I am trying to navigate over pages via the next button it will stop clicking on checkboxes after one or 2 pages and throws me below error.

I have tried with xpath, css selector and id method But all get failed.




Line of Code Used-

checkboxClicked = WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "#workflow_table > thead > tr > th.first.checkbox-column.checkbox > input"))).click()




Error Stack Traces:-

 File "D:/Vipul Garg Backup/XXXX/TestingPardotExportProgramsData.py", line 74, in <module>

        ProgramsPathlist = getDataForPrograms(RecordsonOnePage,totalnofpages)

      File "D:/Vipul Garg Backup/XXXX/TestingPardotExportProgramsData.py", line 63, in getDataForPrograms

        RecordsonOnePage = getrecordsoNpage()

      File "D:/Vipul Garg Backup/XXXX/TestingPardotExportProgramsData.py", line 42, in getrecordsoNpage

        CheckBoxclick = WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "#workflow_table > thead > tr > th.first.checkbox-column.checkbox > input"))).click()

      File "C:\Users\Vipul.Garg\AppData\Local\Programs\Python\Python37\lib\site-packages\selenium\webdriver\remote\webelement.py", line 80, in click

        self._execute(Command.CLICK_ELEMENT)

      File "C:\Users\Vipul.Garg\AppData\Local\Programs\Python\Python37\lib\site-packages\selenium\webdriver\remote\webelement.py", line 633, in _execute

        return self._parent.execute(command, params)

      File "C:\Users\Vipul.Garg\AppData\Local\Programs\Python\Python37\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 321, in execute

        self.error_handler.check_response(response)

      File "C:\Users\Vipul.Garg\AppData\Local\Programs\Python\Python37\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response

        raise exception_class(message, screen, stacktrace)

    selenium.common.exceptions.StaleElementReferenceException: Message: stale element reference: element is not attached to the page document

      (Session info: chrome=80.0.3987.122)

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[Josh Abrahamsen]

Vipul,

Does the page have any busy loading indicator you could wait for visibility of and then invisibility of? Basically what is happening here is the page takes longer to load the next checkbox then Selenium is waiting for. By the time the next button is clicked it's already seeing the same checkbox and then attempting to click it while the next one has loaded.

The reason for this is because the element you are referencing is removed from the DOM.

I've gotten around this by waiting for the busy loading indicator to be visible, then invisible, and then clicking on the element.

Other fixes I'm seeing would be something like this to reference the element again upon getting the exception:

try {
    checkboxClicked = WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "#workflow_table > thead > tr > th.first.checkbox-column.checkbox > input")));
    checkboxClicked.click();
}
catch(org.openqa.selenium.StaleElementReferenceException ex)
{
    checkboxClicked = WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "#workflow_table > thead > tr > th.first.checkbox-column.checkbox > input")));
   checkboxClicked.click();
}