Buttons: download button with scroller downloads only few rows

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Buttons: download button with scroller downloads only few rows



I am handling tables with more than 100 000 rows and using DT package (development version 0.1.56) to visualize it in Shiny App.


DT



Furthermore I am using DT Extensions as: Buttons, to download the data in different formats. However while Scroller extension is as well activated, i am able only to download few rows (not all data).


DT


Buttons


Scroller



Sample code:


library("shiny")
library("DT")

shinyApp(
ui = fluidPage(DT::dataTableOutput('tbl')),
server = function(input, output)
output$tbl = DT::renderDataTable(
iris,extensions=c("Buttons",'Scroller'),options = list(dom = 'Bfrtip',
buttons = c('copy', 'csv', 'excel', 'pdf', 'print'),scrollY = 50,
scroller = TRUE
))

)



Additionally if i run only this part of the code in R and get the datatable in the viewer, i am able to copy etc. all rows, how it is even possible?


library("DT")
datatable(
iris,
extensions = 'Buttons', options = list(
dom = 'Bfrtip',
buttons = c('copy', 'csv', 'excel', 'pdf', 'print')
)
)



I have tried different approaches:



Changing scrollY = ... in the option list -> it is working but the number of scrollY has to be huge to actually display all data rows so it could be downloaded fully --> not good approach, as my data comes from Database, i obtain different number of rows plus it makes the app extremally slow


scrollY =


scrollY



Using pageLength option: pageLength = ..., lengthMenu=c(..,..,..,..)


pageLength = ..., lengthMenu=c(..,..,..,..)



However the option to choose is not displayed at all...



Any ideas how i can solve this problem?


downloadHandler()


DT



**I have seen already the same question:



Download button downloads only 145 rows in DataTables with Scroller



but it has not been answered in the meaning of DT package


DT



Thanks in advance





What happens if you add server=FALSE in DT::renderDataTable?
– Carl
Jul 22 '16 at 22:08


server=FALSE


DT::renderDataTable





Hi Carl, actually that is working perfectly! Thanks! If You post it as an answer i am going to accept it straight away
– Mal_a
Jul 25 '16 at 5:18




2 Answers
2



The issue is that when server=TRUE only the data being displayed is being sent to the client. Setting server=FALSE renders all the DT stuff in the client so all the data is there.


server=TRUE


server=FALSE



It is indeed server = TRUE that does the trick.


server = TRUE



Here is the code since some people like me might put the argument in the wrong place.


library("shiny")
library("DT")

shinyApp(
ui = fluidPage(DT::dataTableOutput('tbl')),
server = function(input, output)
output$tbl = DT::renderDataTable(server = FALSE,
DT::datatable(iris,
extensions=c("Buttons",'Scroller'),
options = list(dom = 'Bfrtip',
buttons = c('copy', 'csv',
'excel', 'pdf',
'print'),
scrollY = 50,
scroller = TRUE)
)
)

)






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