R Shiny app shows old data

Question

I have shiny app, which is displaying old data (4 days delay!) though on the server data are refreshed (current day).

What is strange the old dataset does not exist

Answer 1

I found that cache of R Shiny server is updated when the date of creation for the file "app.R" is changed.

So, here is the trick I used:

server <- function(input, output, session) {

   # Trick file date creation update
   onStop(function() {

     # File name
     p <- paste0(getwd(), "/app.R")

     # Update file 'date creation'
     Sys.setFileTime(p, now())

  }) # onStop

 ...


} # server

The idea is to update the date of "app.R" creation after each session.