r:rhandsontable不显示过滤后的反应性内容

我有一个闪亮的应用程序显示一个可编辑的 rhandsontable 并在绘图中显示表格输出。只要我发送一个“完整的”反应性数据帧到 洗手间桌 但当我想将显示的内容 selectInput 值,应用程序将中断,并显示以下错误消息:

倾听 http://127.0.0.1:5362

警告:矩阵中的错误:“data”必须是矢量类型,为“null”

堆栈跟踪(最里面的第一个): 60:矩阵 59: 58:打电话 57:热天 56:Observerfunc[P:/Mango Engagement/00-Claims/00-Shining-Sprint3/20190211 Shining Breaked Reactive Values可编辑表格绘图。r 57] 1:RunAPP

错误:【请求读取】连接被对等方重置

你对怎么做有什么想法吗?在下面的脚本中,您可以通过注释/取消注释 react_df() .

library(shiny)
library(rhandsontable)
library(dplyr)
library(ggplot2)

#### based on the SO code found here: https://stackoverflow.com/a/52607643/6327771

df <- data.frame(country = c(rep('US', 5), rep('UK', 5)),
           date = rep(as.Date(c('2018-01-01', '2018-02-01', '2018-03-01', '2018-04-01', '2018-05-01')), 2),
           val = rep(sample(6:8, size = 5, replace = T), 2))



ui <- fluidPage(
  selectInput("country", "Choose the Country",
              choices = df %>% unique() %>%  pull(country),
              selected = 'US',
              multiple = FALSE),
  rHandsontableOutput('table'), # editable table with bar heights
  plotOutput('plot')#, # bar plot that takes values from the drop-down menu and the editable table 
)


server <- function(input,output,session)({

#### REACTIVE INPUT: SUBSETTED VERSUS COMPLETE DATA ####  
## subsetted version of react_df() 

#  react_df <- reactive({
#    df %>%
#      filter(country == input$country)
#  })

## complete version of react_df()   
  react_df <- reactive({df})

  values <- reactiveValues(data = NULL)


  observe({
    values$data <-react_df()
  })


  #observe the  table
  observe({
    if(!is.null(input$table))
      values$data <- hot_to_r(input$table)
  })

  # output the table 
  output$table <- renderRHandsontable({
    req(values$data)
    rhandsontable(values$data)
  })


# update the plot  
  output$plot <- renderPlot({
    req(values$data)
    ggplot(values$data, aes(date, val)) +
      geom_line() +
      geom_point()

  })

})

shinyApp(ui = ui, server = server)