CODEWITHSUNDEEP
rshinydtshinymodules
Francesc VE
Francesc VE

Reputation: 762

editable DT inside shiny module

I would like to have an editable DT inside a shiny module. When I change a value in the DT, then the table updates and it is empty with the message inside the datatable:

"No matching records found"

My code is as follows:

Modules:

modDtUi <- function(id){ # UI module
  ns = NS(id)
  DT::dataTableOutput(ns('x1'))
} 


modDt <-  function(input, output, session, data){ # Server module

  x <- data
  output$x1 <- DT::renderDataTable(x, selection = 'none', editable = TRUE)

  proxy <- dataTableProxy('x1', session = session)

  observeEvent(input$x1_cell_edit, {
    info = input$x1_cell_edit
    str(info)
    print(info)
    i = info$row
    j = info$col
    v = info$value
    x[i, j] <<- DT::coerceValue(v, x[i, j])
    replaceData(proxy, x, resetPaging = FALSE, rownames = FALSE)
  })

}

app in flexdashboard:

```{r}
modDtUi("editable")
```

```{r}
callModule(modDt,"editable", data = iris)
```

It works well without modules, but I can't get the same results with shiny modules.

Thanks

Upvotes: 5

Views: 3523

Answers (3)

asachet
asachet

Reputation: 6921

Working from your code, the issue is that the proxy needs the global session (and not the module session). See my other answer for an alternative approach.

You can simply pass the global session to the module via an argument.

This works:

library(shiny)
library(DT)

modDtUi <- function(id){ # UI module
  ns = NS(id)
  DT::dataTableOutput(ns('x1'))
}


modDt <-  function(input, output, session, data, globalSession){ # Server module

  x <- data
  output$x1 <- DT::renderDataTable(x, selection = 'none', editable = TRUE)

  proxy <- dataTableProxy('x1', session = globalSession)

  observeEvent(input$x1_cell_edit, {
    info = input$x1_cell_edit
    str(info)
    print(info)
    i = info$row
    j = info$col
    v = info$value
    x[i, j] <<- DT::coerceValue(v, x[i, j])
    replaceData(proxy, x, resetPaging = FALSE)
  })

}

You now have to add the global session in the module call.

With a shiny app:

ui <- fluidPage(
  modDtUi("editable")
)

server <- function(input, output, session) {
  callModule(modDt,"editable", data = iris, globalSession = session)
}

shinyApp(ui = ui, server = server)

With a flexdashboard:

```{r}
modDtUi("editable")
```

```{r}
callModule(modDt, "editable", data = iris, globalSession = session)
```

If you want to use your updated table in the rest of your app, simply return reactive(x) from your module and capture it when you call the module.

editable_iris <- callModule(modDt,"editable", data = iris, globalSession = session)

Upvotes: 2

St&#233;phane Laurent
St&#233;phane Laurent

Reputation: 84519

This works if you remove rownames = FALSE:

replaceData(proxy, x, resetPaging = FALSE)#, rownames = FALSE)

If you don't want row names, you have to also set rownames = FALSE in the renderDataTable:

  output$x1 <- DT::renderDataTable(x, selection = 'none', editable = TRUE, 
                                   rownames = FALSE)

And then you have to add 1 to info$col:

  observeEvent(input$x1_cell_edit, {
    info = input$x1_cell_edit
    i = info$row
    j = info$col + 1
    v = info$value
    x[i, j] <<- DT::coerceValue(v, x[i, j])
    replaceData(proxy, x, resetPaging = FALSE, rownames = FALSE)
  })

Full code of the Rmd flexdashboard:

---
title: "Untitled"
output: 
  flexdashboard::flex_dashboard:
    orientation: columns
    vertical_layout: fill
runtime: shiny
---

```{r setup, include=FALSE}
library(flexdashboard)
library(DT)

modDtUi <- function(id){ # UI module
  ns = NS(id)
  DT::dataTableOutput(ns('x1'))
} 

modDt <-  function(input, output, session, data){ # Server module

  x <- data
  output$x1 <- DT::renderDataTable(x, selection = 'none', editable = TRUE, 
                                   rownames = FALSE)

  proxy <- dataTableProxy('x1', session = session)

  observeEvent(input$x1_cell_edit, {
    info = input$x1_cell_edit
    i = info$row
    j = info$col + 1
    v = info$value
    x[i, j] <<- DT::coerceValue(v, x[i, j])
    replaceData(proxy, x, resetPaging = FALSE, rownames = FALSE)
  })

}
```

Column {data-width=650}
-----------------------------------------------------------------------

### Editable table

```{r}
modDtUi("editable")
```

```{r}
callModule(modDt, "editable", data = iris)
```

Upvotes: 4

asachet
asachet

Reputation: 6921

The following gives me an editable table and captures the edited table in a reactive for further use in the application:

library(shiny)
library(DT)

modDtUi <- function(id){ # UI module
  ns = NS(id)
  DT::dataTableOutput(ns('x1'))
}


modDt <-  function(input, output, session, data){ # Server module

  output$x1 <- DT::renderDataTable(data, selection = 'none', editable = TRUE, server = TRUE)
  proxy <- dataTableProxy('x1', session = session)

  updatedData <- eventReactive(input$x1_cell_edit, {
    info = input$x1_cell_edit
    if (!is.null(info)) {
      str(info)
      data[info$row, info$col] <<- DT::coerceValue(info$value,
                                                   data[info$row, info$col])
    }
    data
  }, ignoreNULL = FALSE)

  return(updatedData)
}

ui <- fluidPage(
  modDtUi("editable"),
  tags$hr(),
  "Proof it works: the table below updates on edit.",
  shiny::tableOutput("proof")
)

server <- function(input, output) {
  editable_dt <- callModule(modDt,"editable", data = iris)

  output$proof <- renderTable({
    editable_dt() %>%
      summarise_if(is.numeric, mean)
  })

}

shinyApp(ui = ui, server = server)

Upvotes: 0

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