问题
How to implement a page views counter in Sinatra and Ruby?
I have tried the @@ variables but they reset to zero whenever the page is loaded...
Like this one: http://148.251.142.233:8080/
Thanks!
回答1:
I think your problem is that you cant store global variable in sinatra as usual. You need to store page views count data in setting like this
set :my_config_property, 'hello world'
Here is docs about it http://www.sinatrarb.com/configuration.html SO question about it In Sinatra(Ruby), how should I create global variables which are assigned values only once in the application lifetime?
回答2:
Just storing the value in memory will not be enough because your application server will probably be serving request with different processes and every process will have a different copy of the class variables. Even if that work when the server is reset you will lose the counter value anyway.
I would use a specialized database like Redis. It's very fast and easy to do what you want. You just use something like this:
require "redis"
redis = Redis.new
total_pageviews = redis.incr("page_counter")
来源：https://stackoverflow.com/questions/29708416/page-views-counter-sinatra