NoReverseMatch 1模式(s)尝试:[(? P < id > \ \ d +)/(? P [w - \ \]+)/美元)

I'm new in Django, using version 2.0. Started building a 'shop' application according to the 'Django by Example' book. But the book uses django version 1.8. The problem is, when I browse I'm new in Django, using version 2.0. Started b