db.py

def add_product_detail(details):

    new = db["products"]
    ASIN = details["url"][len(details["url"])-10:len(details["url"])]
    details["date"] = datetime.datetime.utcnow()

    try:
        new.update_one(
            {
                "asin":ASIN
            }, 
            {
                "$set": {
                    "asin":ASIN
                }, 
                "$push":{
                    "details":details
                }
            }, 
            upsert=True
        )
        return True
    except Exception as identifier:
        print(identifier)
        return False