Creating modules in Shiny: linking checkboxInputs from module.R to observeEvents in app.R










0















I'm trying to create a module containing the menuItems and checkboxInputs in a module.R script and link these inputs to observeEvents in app.R



I'd be grateful for any suggestions as after searching widely on the web, I'm getting the following error:



ERROR: cannot coerce type 'closure' to vector of type 'character'



This is my module.R file:



library(modules)
library(shiny)
library(shinydashboard)

dashboardSidebarUI2 <- function(id)
ns <- NS(id)
tagList(

checkboxInput(inputId = ns("pow_id"), label = "Power plants (all)", value = FALSE)

)

setup<-function(input,output,session,sel)
sel<-reactive(input$pow_id)
return(sel)





The relevant part in app.R:



library(modules)
library(shiny)
library(shinydashboard)

source("module.R"),
dashboardSidebar(
width = 310,
sidebarMenu(

dashboardSidebarUI2("sel"),

)
)






After further research, I found the following code works:



In module.R:



dashboardSidebarUI2 <- function(id) 
ns <- NS(id)
tagList(
checkboxInput(inputId = ns("pow_id"), label = "Power plants (all)", value = FALSE)

)


setup<-function(input,output,session)

reactive(input$pow_id)



In app.R:



source("module.R"),

dashboardSidebar(
width = 310,
sidebarMenu(

dashboardSidebarUI2("basic"),

)
)


server <- function(input, output, session) {
pow_id <- callModule(setup,"basic")


observeEvent(pow_id(), {
ib <- pow_id()


It has taken a while to sort this out. These resources I found especially useful:
https://itsalocke.com/blog/shiny-module-design-patterns-pass-module-inputs-to-other-modules/
https://github.com/rstudio/webinars/blob/master/19-Understanding-modules/01-Modules-Webinar.pdf



However, if would be good to know if there is a more correct/alternative method.



Thanks.










share|improve this question




























    0















    I'm trying to create a module containing the menuItems and checkboxInputs in a module.R script and link these inputs to observeEvents in app.R



    I'd be grateful for any suggestions as after searching widely on the web, I'm getting the following error:



    ERROR: cannot coerce type 'closure' to vector of type 'character'



    This is my module.R file:



    library(modules)
    library(shiny)
    library(shinydashboard)

    dashboardSidebarUI2 <- function(id)
    ns <- NS(id)
    tagList(

    checkboxInput(inputId = ns("pow_id"), label = "Power plants (all)", value = FALSE)

    )

    setup<-function(input,output,session,sel)
    sel<-reactive(input$pow_id)
    return(sel)





    The relevant part in app.R:



    library(modules)
    library(shiny)
    library(shinydashboard)

    source("module.R"),
    dashboardSidebar(
    width = 310,
    sidebarMenu(

    dashboardSidebarUI2("sel"),

    )
    )






    After further research, I found the following code works:



    In module.R:



    dashboardSidebarUI2 <- function(id) 
    ns <- NS(id)
    tagList(
    checkboxInput(inputId = ns("pow_id"), label = "Power plants (all)", value = FALSE)

    )


    setup<-function(input,output,session)

    reactive(input$pow_id)



    In app.R:



    source("module.R"),

    dashboardSidebar(
    width = 310,
    sidebarMenu(

    dashboardSidebarUI2("basic"),

    )
    )


    server <- function(input, output, session) {
    pow_id <- callModule(setup,"basic")


    observeEvent(pow_id(), {
    ib <- pow_id()


    It has taken a while to sort this out. These resources I found especially useful:
    https://itsalocke.com/blog/shiny-module-design-patterns-pass-module-inputs-to-other-modules/
    https://github.com/rstudio/webinars/blob/master/19-Understanding-modules/01-Modules-Webinar.pdf



    However, if would be good to know if there is a more correct/alternative method.



    Thanks.










    share|improve this question


























      0












      0








      0








      I'm trying to create a module containing the menuItems and checkboxInputs in a module.R script and link these inputs to observeEvents in app.R



      I'd be grateful for any suggestions as after searching widely on the web, I'm getting the following error:



      ERROR: cannot coerce type 'closure' to vector of type 'character'



      This is my module.R file:



      library(modules)
      library(shiny)
      library(shinydashboard)

      dashboardSidebarUI2 <- function(id)
      ns <- NS(id)
      tagList(

      checkboxInput(inputId = ns("pow_id"), label = "Power plants (all)", value = FALSE)

      )

      setup<-function(input,output,session,sel)
      sel<-reactive(input$pow_id)
      return(sel)





      The relevant part in app.R:



      library(modules)
      library(shiny)
      library(shinydashboard)

      source("module.R"),
      dashboardSidebar(
      width = 310,
      sidebarMenu(

      dashboardSidebarUI2("sel"),

      )
      )






      After further research, I found the following code works:



      In module.R:



      dashboardSidebarUI2 <- function(id) 
      ns <- NS(id)
      tagList(
      checkboxInput(inputId = ns("pow_id"), label = "Power plants (all)", value = FALSE)

      )


      setup<-function(input,output,session)

      reactive(input$pow_id)



      In app.R:



      source("module.R"),

      dashboardSidebar(
      width = 310,
      sidebarMenu(

      dashboardSidebarUI2("basic"),

      )
      )


      server <- function(input, output, session) {
      pow_id <- callModule(setup,"basic")


      observeEvent(pow_id(), {
      ib <- pow_id()


      It has taken a while to sort this out. These resources I found especially useful:
      https://itsalocke.com/blog/shiny-module-design-patterns-pass-module-inputs-to-other-modules/
      https://github.com/rstudio/webinars/blob/master/19-Understanding-modules/01-Modules-Webinar.pdf



      However, if would be good to know if there is a more correct/alternative method.



      Thanks.










      share|improve this question
















      I'm trying to create a module containing the menuItems and checkboxInputs in a module.R script and link these inputs to observeEvents in app.R



      I'd be grateful for any suggestions as after searching widely on the web, I'm getting the following error:



      ERROR: cannot coerce type 'closure' to vector of type 'character'



      This is my module.R file:



      library(modules)
      library(shiny)
      library(shinydashboard)

      dashboardSidebarUI2 <- function(id)
      ns <- NS(id)
      tagList(

      checkboxInput(inputId = ns("pow_id"), label = "Power plants (all)", value = FALSE)

      )

      setup<-function(input,output,session,sel)
      sel<-reactive(input$pow_id)
      return(sel)





      The relevant part in app.R:



      library(modules)
      library(shiny)
      library(shinydashboard)

      source("module.R"),
      dashboardSidebar(
      width = 310,
      sidebarMenu(

      dashboardSidebarUI2("sel"),

      )
      )






      After further research, I found the following code works:



      In module.R:



      dashboardSidebarUI2 <- function(id) 
      ns <- NS(id)
      tagList(
      checkboxInput(inputId = ns("pow_id"), label = "Power plants (all)", value = FALSE)

      )


      setup<-function(input,output,session)

      reactive(input$pow_id)



      In app.R:



      source("module.R"),

      dashboardSidebar(
      width = 310,
      sidebarMenu(

      dashboardSidebarUI2("basic"),

      )
      )


      server <- function(input, output, session) {
      pow_id <- callModule(setup,"basic")


      observeEvent(pow_id(), {
      ib <- pow_id()


      It has taken a while to sort this out. These resources I found especially useful:
      https://itsalocke.com/blog/shiny-module-design-patterns-pass-module-inputs-to-other-modules/
      https://github.com/rstudio/webinars/blob/master/19-Understanding-modules/01-Modules-Webinar.pdf



      However, if would be good to know if there is a more correct/alternative method.



      Thanks.







      shiny shinydashboard






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 15 '18 at 10:50







      Richard

















      asked Nov 15 '18 at 7:00









      RichardRichard

      2518




      2518






















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