1

我正在尝试使用 RpostgreSQL 来获取要输入 rpivotTable 包并使用闪亮显示给用户的数据。

错误：数据应该是 data.frame、data.table 或 table

不幸的是，我是 R 新手，我无法弄清楚如何将我的 postgreSQL 查询设置为数据框、表或 data.table，以便可以创建 rpivotTable。

library(shiny)
library(DBI)
library(RPostgreSQL)
library(DT)
library(plotly)
library(rjson)
library(pool)
library(dplyr)
library(dbplyr)
library(rpivotTable)


ui <- fluidPage(


##DEBUGGING##

tableOutput("tbl"),

rpivotTable(Titanic),

### sql & rpivottable attempts ###

rpivotTable("OverallPivot"),

rpivotTableOutput("tbl2"),


output$pivtbl2 <- renderRpivotTable(rpivotTable(data = DataSet,
                                                aggregatorName = "Sum",
                                                vals = "Count",
                                                cols = "order_date",
                                                rows = "product_id",
                                                menuLimit = 1200,
                                                rendererName = "Line Chart"))

)


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


  ###DEBUGGING SERVER

  output$tbl <- renderTable({
    conn <- dbConnect(
      drv = dbDriver("PostgreSQL"),
      dbname = "store",
      host = "localhost",
      user = "postgres",
      password = "123456")
    on.exit(dbDisconnect(conn), add = TRUE)
    dbGetQuery(conn, paste0(
      "SELECT * FROM orders;"))
  })

  ###Attempted sql & rpivotTable attempts SERVER

  OverallPivot <- renderRpivotTable({    conn <- dbConnect(
    drv = dbDriver("PostgreSQL"),
    dbname = "store",
    host = "localhost",
    user = "postgres",
    password = "123456")
  on.exit(dbDisconnect(conn), add = TRUE)
  dbGetQuery(conn, paste0(
    "SELECT * FROM orders;"))
  })

  DataSet <- renderRpivotTable({    conn <- dbConnect(
    drv = dbDriver("PostgreSQL"),
    dbname = "store",
    host = "localhost",
    user = "postgres",
    password = "123456")
  on.exit(dbDisconnect(conn), add = TRUE)
  dbGetQuery(conn, paste0(
    "SELECT * FROM orders;"))
  })


tbl2 <- renderRpivotTable({
  conn <- dbConnect(
    drv = dbDriver("PostgreSQL"),
    dbname = "store",
    host = "localhost",
    user = "postgres",
    password = "123456")
  on.exit(dbDisconnect(conn), add = TRUE)
  dbGetQuery(conn, paste0(
    "SELECT * FROM orders;"))
})

  }


shinyApp(ui, server)

我能够以闪亮的“tbl”格式显示来自postgres sql的表，并使用闪亮的R中的泰坦尼克数据框显示数据透视表。

我只是无法弄清楚如何将两者结合在一起并使用 postgres sql 查询以闪亮的方式显示 rpivottable。

我已经在调试部分中拆分了我的成功示例和我失败的失败尝试

谢谢你的帮助！

4

1 回答 1

1

您需要在函数之外创建 R 对象renderRpivotTable。

服务器.R

library(shiny)
library(rpivotTable)
library(RPostgreSQL)

function(input, output, session) {

  conn <- dbConnect(
    drv = dbDriver("PostgreSQL"),
    dbname = "store",
    host = "localhost",
    user = "postgres",
    password = "123456")

  on.exit(dbDisconnect(conn), add = TRUE)

  db_data <- dbGetQuery(conn, paste0("SELECT * FROM orders;"))

  output$pivot <- renderRpivotTable({
    rpivotTable(data = db_data)

  })

}

用户界面

library(shiny)
library(rpivotTable)

test_page <- fluidPage(
  rpivotTableOutput('pivot')
)

test_page
于 2019-03-10T23:12:58.830 回答