Myujth

A year ago I was building a Shiny app and was asking how to display the default folder with shinyFiles.

At this time, with the help of commentators, I built a reproducible example, which was working:

library(shiny)
library(shinyFiles)

ui <- fluidPage( # Application title
 mainPanel(
 shinyDirButton("dir", "Input directory", "Upload"),
 verbatimTextOutput("dir", placeholder = TRUE) 
 ))

server <- function(input, output) 
 shinyDirChoose(
 input,
 'dir',
 roots = c(home = '~'),
 filetypes = c('', 'txt', 'bigWig', "tsv", "csv", "bw")
 )

 global <- reactiveValues(datapath = getwd())

 dir <- reactive(input$dir)

 output$dir <- renderText(
 global$datapath
 )

 observeEvent(ignoreNULL = TRUE,
 eventExpr = 
 input$dir
 ,
 handlerExpr = 
 home <- normalizePath("~")
 global$datapath <-
 file.path(home, paste(unlist(dir()$path[-1]), collapse = .Platform$file.sep))
 )


# Run the application
shinyApp(ui = ui, server = server)

Now it's time to update my Shiny app, I updated the R version and a number of packages and it stopped working. I'm getting the following error:

Warning: Error in $: $ operator is invalid for atomic vectors
 75: unlist
 72: observeEventHandler
 1: shiny::runApp

I can't figure out what is wrong now. I tried installing the previous version of shinyFiles but surprisingly still getting the same error. So it must be some other package.

I would appreciate any ideas!

UPD. Adding req(is.list(input$dir)) fixed the problem, now I can the file selection works in the app but if I run it from Docker, I can't see the shared directory...

Ok, just got a reply from shinyFiles developers: https://github.com/thomasp85/shinyFiles/issues/109#issuecomment-439185038

Inserting req(is.list(input$dir)) fixed the problem.