DT tables not shown in shiny

Question

I have a shiny app that opens with a simple .bat file that executes R and the script run.r in the background. The shiny use the package DT extensively to render all the tables. The problem i'm having is that if i run the shiny from Rstudio run app it shows all the tables but if I execute the shiny with the .bat file it just doesn't show theme. I have done this like 4 times and it is the first time it happens and I don't know the problem. I have the latest version of the pacakges of the DT available in CRAN,

So my server.r is :

server <- function(input, output,session) {
  observeEvent(input$run,{

TablasVaR <- function(mat,DT = T){
      mat_tbl <- data.frame(Activos = rownames(mat),Porcentaje = mat[,"Porcentaje"],
                            VaR = mat[,"Nivel"])

      tabla <- datatable(mat_tbl, escape = T,rownames = FALSE, 
                         selection = list(target = 'row'),
                         options = list(dom = 'tip', paging = TRUE))%>%
        formatStyle(1:ncol(mat_tbl),fontSize = '100%')%>%
        formatCurrency(3,digits = 0)%>%
        formatPercentage(2,digits = 1)
      if(DT){
        return(tabla)
      } else{
        return(mat_tbl)
      }

    }

    matr <- data.frame(Porcentaje=rnorm(19),Nivel = rnorm(19))



  output$table <- renderDataTable({TablasVaR(matr)})
  })
  session$onSessionEnded(function() {
    stopApp()
  })  
}

the ui.r is

ui <- fluidPage(
  sidebarLayout(
    sidebarPanel(),
    wellPanel(style = "background-color: #ffffff;",
              bsButton("run","run1",block=F, style="default"),
              fluidRow(column(4,align="center",offset = 4,
                              dataTableOutput("table"))))
  ))

the run.r is:

librerias <- c("openxlsx","ggplot2","scales","rugarch","zoo","data.table","stringr",
               "DT","plotly","lubridate","knitr","gridExtra","grid","shinyBS",
               "rmarkdown","nloptr","shiny")
if(length(setdiff(librerias, rownames(installed.packages()))) > 0){
  install.packages(setdiff(librerias, rownames(installed.packages())))
}
invisible(sapply(librerias, require, character.only = TRUE))
CAMINO <<- "D:/Users/aandr/Documents/Ejemplo/"
runApp(CAMINO, launch.browser=TRUE)

and the .bat file contains:

"C:\Program Files\R\R-3.5.1\bin\R.exe" CMD BATCH "run.r"

if I run the shiny app from the run.r the DT is display, but if I run it from the .bat file it wont. To make it run you will need to save the server.r, ui.r, run.r and .bat in the same folder.

Answer 1

If you read RStudio's page on Using DT in Shiny , you may not have noticed

Note that in DT , DTOutput() is an alias of dataTableOutput() , and renderDT() is an alias of renderDataTable() . You are recommended to use DTOutput() and renderDT() to avoid possible collisions with functions of the same names in shiny ( shiny::dataTableOutput() and shiny::renderDataTable() ).

Collisions, that's your problem. To confirm, if you see this:

find("dataTableOutput")
# [1] "package:DT"    "package:shiny"
find("renderDataTable")
# [1] "package:DT"    "package:shiny"

then the function name collision is likely to blame. Try replacing your dataTableOutput(...) with either DT::dataTableOutput(...) or DTOutput(...) ; and replace renderDataTable(...) with either DT::renderDataTable(...) or renderDT(...) .