dataTableAjax: Register a data object in a shiny session for DataTables

In DT: A Wrapper of the JavaScript Library 'DataTables'

Register a data object in a shiny session for DataTables

Description

This function stores a data object in a shiny session and returns a URL that returns JSON data based on DataTables Ajax requests. The URL can be used as the url option inside the ajax option of the table. It is basically an implementation of server-side processing of DataTables in R. Filtering, sorting, and pagination are processed through R instead of JavaScript (client-side processing).

Usage

dataTableAjax(
  session,
  data,
  rownames,
  filter = dataTablesFilter,
  outputId,
  future = FALSE
)

Arguments

session	the session object in the shiny server function (function(input, output, session))
data	a data object (will be coerced to a data frame internally)
rownames	see datatable(); it must be consistent with what you use in datatable(), e.g. if the widget is generated by datatable(rownames = FALSE), you must also use dataTableAjax(rownames = FALSE) here
filter	(for expert use only) a function with two arguments data and params (Ajax parameters, a list of the form list(search = list(value = 'FOO', regex = 'false'), length = 10, ...)) that return the filtered table result according to the DataTables Ajax request
outputId	the output ID of the table (the same ID passed to dataTableOutput(); if missing, an attempt to infer it from session is made. If it can't be inferred, a random id is generated.)
future	whether the server-side filter function should be executed as a future or as a standard synchronous function. If true, the future will be evaluated according to the session's plan.

Details

Normally you should not need to call this function directly. It is called internally when a table widget is rendered in a Shiny app to configure the table option ajax automatically. If you are familiar with DataTables' server-side processing, and want to use a custom filter function, you may call this function to get an Ajax URL.

Value

A character string (an Ajax URL that can be queried by DataTables).

References

https://rstudio.github.io/DT/server.html

Examples

DTApp = function(data, ..., options = list()) {
  library(shiny)
  library(DT)
  shinyApp(
    ui = fluidPage(
      title = 'Server-side processing of DataTables',
      fluidRow(
        DT::dataTableOutput('tbl')
      )
    ),
    server = function(input, output, session) {
      options$serverSide = TRUE
      options$ajax = list(url = dataTableAjax(session, data, outputId = 'tbl'))
      # create a widget using an Ajax URL created above
      widget = datatable(data, ..., options = options)
      output$tbl = DT::renderDataTable(widget)
    }
  )
}

if (interactive()) DTApp(iris)
if (interactive()) DTApp(iris, filter = 'top')

DT documentation built on May 29, 2024, 8:56 a.m.