Trying to display product info in HTML productDescription.html with no result

[anatolil001]

Hi there!
I'm a bit confused with displaying product card (info) using @app.route ('/productDescription') and corresponding HTML page productdescription.html.

As far as I understand, the value of productid should be passed to URL address ('/productDescription?productid') with the according data retrieved from POSTGRESQL and displayed on corresponding HTML page - which never happened. For some reason flask cannot find this page, though, when I used

return request.args.get('productid')

the system takes me to the proper ('/productDescription?productid') page, say with productid=1, meanwhile it shows one and only productid value with no other required information from query.

I would appreciate if you give me the proper direct answer and guide!
Thank you in advance
Best regards
Anatoli