[Django] The question of changing urlpattern dynamically

A couple of days my colleague gave me a quesiont about how to  change urlpattern dynamically in Django. Well, I indeed take some time to survey the way to do so even though we figure out alternatives to achieve the same result that we want. So, the following list is about the solution:

I perfer to adopt using middleware class to resolve this problem as follows:

An alternative method would be to either create a super pattern that calls a view, which in turn makes a DB call. Another approach is to handle this in a middleware class where you test for a 404 error, check if the pattern is likely to be one of your categories, and then do the DB look up there. I have done this in the past and it's not as bad as it sounds. Look at the django/contrib/flatpages code for a straightforward implementation of this approach.

For how to use middleware class, there is another link for the reference.


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