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我正在尝试使用每次加载应用程序时从数据库中动态填充的列表来执行此自动完成。不幸的是，以下方法不起作用。

rm(list = ls())

library(shinysky)
library(shiny)
library(RMySQL)

loadData <- function(publisherId) {
# Connect to the database
mydb = dbConnect(MySQL(), user='root', password='root',host='localhost',dbname="tq")

# Construct the fetching query
  query <- sprintf("select * from tq.publisher_dim where publisher_id = %s",publisherId)  # Submit the fetch query and disconnect
  data <- dbGetQuery(mydb, query)
  dbDisconnect(mydb)
  data
}

loadPubIds <- function() {
  # Connect to the database
  mydb = dbConnect(MySQL(), user='root', password='root', host='localhost',     dbname="tq")

  # Construct the fetching query
  query <- sprintf("select distinct publisher_id from tq.publisher_dim" )  
#    Submit the fetch query and disconnect
  data <- dbGetQuery(mydb, query)
  dbDisconnect(mydb)
  data
}


my_autocomplete_list <- c(loadPubIds())

ui <- fluidPage(
  select2Input("txt","",choices = NULL,selected = NULL),
  textInput(inputId ="publisherId", label="choose publisherId", value = "",     width = NULL, placeholder = NULL),
  actionButton("goButton", "Go!"),
  dataTableOutput('mytable')
  #textOutput('myquery')
)

server <- function(input, output,session) {
  test <- reactive({
    pubs <- loadPubIds()  
  })
  observe({
    pubs <- loadPubIds()
    updateSelect2Input(session, 'txt', choices = as.list(pubs), label = "")
  })
  output$mytable <- renderDataTable({
    if (input$goButton == 0)
      return()

    isolate({ loadData(input$publisherId) })

  })


}

shinyApp(ui = ui, server = server)

任何帮助都会很棒。

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0 回答 0