问题是
renderShiny
函数需要包装另一个创建实际输出的函数,因此它实际上是两个单独的功能,我把它们混淆为一个:
渲染
应该获取另一个实际创建要呈现的对象的函数的输出。然后,下面的命令生效:
library(shiny)
module_factory <- function(data_f = function(x) mtcars[, x],
model_f = function(x) mean(x),
output_shiny = shiny::plotOutput,
render_shiny = shiny::renderPlot,
render_shiny_input = function(x) plot(x),
...){
ui <- function(id, ...){
ns <- NS(id)
output_shiny(ns("ui_out"), ...)
}
server <- function(input, output, session, view_id){
gadata <- shiny::reactive({
data_f(view_id(), ...)
})
model <- shiny::reactive({
shiny::validate(shiny::need(gadata(),
message = "Waiting for data"))
model_f(gadata(), ...)
})
output$ui_out <- render_shiny({
shiny::validate(shiny::need(model(),
message = "Waiting for model output"))
render_shiny_input(gadata())
})
return(model)
}
list(
module = list(
ui = ui,
server = server
)
)
}
made_module <- module_factory()
## ui.R
ui <- fluidPage(title = "module bug Shiny Demo",
h1("Debugging"),
selectInput("select", label = "Select", choices = c("mpg","cyl","disp")),
textOutput("view_id"),
made_module$module$ui("factory1"),
br()
)
## server.R
server <- function(input, output, session){
callModule(made_module$module$server, "factory1", view_id = reactive(input$select))
output$view_id <- renderText(paste("Selected: ", input$select))
}
# run the app
shinyApp(ui, server)
