Testing a 'stale' element with Selenium and rspec - ruby

Question

Still a newbie to RSpec and Ruby, so apologies for any obvious errors, omissions, etc in my question.
What I'm looking to test using RSpec (with Selenium Webdriver) is the following;
1) I've (randomly) selected a make of car from a drop down menu
2) From this selected make, I then (randomly) selected a corresponding model of car from a drop down menu
3) Then pressed "Search" button and a list of, for example, BMW 3-Series cars were correctly displayed.
What I now need to do using RSpec is test that the (randomly selected) make and model names are displayed in a page heading and in the URL.
For example, selecting BMW 3-Series will result in the URL ending in /bmw/3-series and a heading on the page will read "BMW 3-Series Cars For Sale".
However, the problem I'm having is that a 'Stale Element' error message is being displayed when I run the test.
I know why the error is displayed (because the elements used to select the make and model are 'lost' when the Search button is pressed, as a new page opens which does not contain these elements), but I don't know how to get around this problem.
Any help would be greatly appreciated.
# This generates a random manufacturer
manuselect = #driver.find_element(:id, 'ctl00_contentHolder_topFullWidthContent_ctlCarsForSaleSearch_ctlUsedCarsSearchTab_ddlManufacturer_Control')
manufacturer = manuselect.find_elements(:tag_name => 'value').sample
#puts manufacturer.text
manufacturer.click
sleep 7
# This generates a random model
modelselect = #driver.find_element(:id, 'ctl00_contentHolder_topFullWidthContent_ctlCarsForSaleSearch_ctlUsedCarsSearchTab_ddlRange_Control')
carmodelrange = modelselect.find_elements(:tag_name => 'value').sample
puts carmodelrange.text
carmodelrange.click
sleep 5
# Click on the Search button
#driver.find_element(:id, 'ctl00_contentHolder_topFullWidthContent_ctlCarsForSaleSearch_ctlUsedCarsSearchTab_btnSearch').click

Answer 1

You just need to store the text you're going to look for into variables before the elements disappear from the page
manufacturer_name = manufacturer.text
modelrange_name = carmodelrange.text
#click the search button...
# the following expectations require Capybaras matchers, use whatever expecations are equivalent with whatever you're using
expect(page).to have_current_path(/#{Regexp.quote(manufacturer_name)}\/#{Regexp.quote(modelrange_name)}$/)
expect(page).to have_text("#{manufacturer_name} #{modelrange_name}")