Shiny App - 本地运行时显示数据表但发布时不显示

Question

我构建了一个 Shiny 应用程序，它依赖于在启动时加载本地存储的 CSV 文件。当我在我的计算机上运行 Shiny 应用程序时，无论是在 RStudio 窗口还是 Google Chrome 中，应用程序都会毫无问题地加载和显示数据。即使没有将数据加载到 R 会话中也是如此。但是，在发布应用程序后，主数据表不会在启动时或在点击提交按钮后显示（试图刷新表）。

当我从使用 Shiny 的数据表功能切换到使用 DT 时，这个问题就开始了。我开始使用 DT 以便能够使第一列中的名称用作链接。我目前正在开发运行 Mavericks 的 64 位 Macbook。今天刚刚在故障排除时更新了 R 和 RStudio。我也尝试从运行 Windows 8 的计算机上发布 - 数据表仍然没有显示在应用的发布版本中。

ui.r 代码：

shinyUI(fluidPage(
    titlePanel("Pinball Buyer's Guide"),

    sidebarLayout(
        sidebarPanel(
            helpText("Whether you're looking for a great value on a machine to buy or just want to find a new table you'd
                     like to play, this guide will help you find a table based on your tastes. Use the sliders below to
                     assign a weight to each category of your table ranking score. The site will use that to generate
                     a score for each of the available tables and to determine how much bang for your buck each table
                     represents."),

            sliderInput('rating',
                    label = 'Player Ratings',
                    value = 1, min = 0, max = 5, step = .25),

            sliderInput('game',
                    label = 'Game Design',
                    value = 1, min = 0, max = 5, step = .25),

            sliderInput('art',
                         label = 'Art',
                        value = 1, min = 0, max = 5, step = .25),


            sliderInput('sound',
                    label = 'Sound',
                    value = 1, min = 0, max = 5, step = .25),

            sliderInput('other',
                         label = 'Other Game Aspects',
                        value = 1, min = 0, max = 5, step = .25),

            sliderInput('staff',
                         label = 'Pinside Staff Ratings',
                        value = 1, min = 0, max = 5, step = .25),

            helpText("Excluding the production year in the pricing model will likely push older tables
                     to the top of the bargain rankings. If you'd prefer a newer machine, leave this checked."
                ),

            checkboxInput('year',
                         label = 'Include Machine Year in Price Model?',
                         value = TRUE),

            submitButton('Submit')

            ),


        mainPanel(
            tabsetPanel(
                tabPanel("Main",
                    br(),
                    textOutput('topTableExplainer'),
                    br(),
                    dataTableOutput('topTables'),
                    br()

                ),
                tabPanel("About This App", 
                         tags$body(textOutput('summary')),
                         br()
                )
            )
        )
    )
))

---

server.r 代码：

library(DT)
pinData <- read.csv('./Data/pinDataMassaged.csv', header=TRUE, stringsAsFactors = FALSE)

userTable <- data.frame()

shinyServer(function(input, output){

    getUserFrame <- reactive({
        userScore <- pinData$rating * input$rating + pinData$gameDesign * input$game + pinData$artwork * input$art +
            pinData$sound * input$sound + pinData$otherRating  * input$other + pinData$staffRating * input$staff

        userTable <- data.frame()
        userTable <- data.frame(pinData, userScore)

        if (input$year == 'TRUE'){
                userModel <- lm(avgValue ~ userScore + age, data = userTable)
        }   else{
                userModel <- lm(avgValue ~ userScore, data = userTable)
        }

        pricePredict <- predict(userModel, userTable)

        pinBargain <- round(pricePredict - userTable$avgValue)

        userTable <- data.frame(userTable, pinBargain)

        userTable <- userTable[,c('nameLink', 'makeAndYear', 'userScore', 'estimatedValue', 'pinBargain')]
    })

    output$topTables <- DT::renderDataTable({

        DT::datatable(data = getUserFrame(),
                    colnames = c('Name', 'Make & Year', 'Your Score', 'Market Price', 'Bargain Amount($)'), 
                    escape = 0, rownames = FALSE, 
                    options = list(pageLength = 20, order = list(2,'desc')))
    })



    output$topTableExplainer <- renderText({
        "The following table presents the top-scoring games based on your criteria. The Bargain Amount column is how much
        of a value buy this game represents when compared to a pricing model based on your criteria. The higher the better. 
        Negative numbers represent games that are overpriced according to the pricing model. 
        Click on the Bargain Amount column to sort by best value. These tables would
        be a great, low-cost way to start your collection."
    })


    output$summary <- renderText({
        "   This app was born after I read way too many 'What should I buy?' discussions on pinball forums. I figured that people
        would appreciate the ability to find great tables based on what they consider most important in a game. As someone longing
        to buy his first pinball machine, I also knew that people would be looking for value tables that they could get a lot of
        game time out of. The data comes from the Pinside top ~250 tables. Some had to be excluded because pricing information
        wasn't available."
    })    

}
)

---

我在发布应用程序时没有收到任何错误或警告消息，并且 Shiny 的应用程序日志部分中没有日志。不知道该转向哪里。非常感谢任何帮助。

Answer 1

我能够解决问题。我需要将 ui.r 中的 dataTableOutput 更改为 DT::dataTableOutput。让它在 R 和本地浏览器中正确运行真的让我大吃一惊，当它是错误的显示/输出时，我认为这是一个数据加载问题。 MLavoie，感谢您在提交时清理代码。