R shinyBS popup window - shiny

Question

I working on a project where I have to create a form in shiny. I currently have a datatable in the UI which has email in the form of hyperlink. Once the hyperlink is clicked the modal window opens where I have another UI which shows the various fields to be filled. I have a save button here that should update my DB in the backend once the button is clicked.
The problem I am facing is that I am unable to reference each email to that particular modal window and my update query updates all the records in the DB. Is there a way to pass all the record details that has been clicked into the modal window??
What I basically need to know is how to update the record that I have clicked on and for which the pop up window is opened??
I am attaching the UI.R and server.R for use.
enter code here
ui.R
library(shiny)
library(DT)
library(shinyBS)
fluidPage(
fluidRow(
actionButton(inputId = "view",label = "Hi")),
#actionButton(inputId = "savepage1", label = "Save"),
DT::dataTableOutput('my_table'),
bsModal("FormModal", "My Modal", "",textOutput('mytext'),uiOutput("form1"),
actionButton("savepage2","Save"),DT::dataTableOutput("table1"),size = "large")
)
enter code here
server.R
library(shinyBS)
server <- function(session, input, output){
uedata<-c("","Prime","Optimus") ##add source data here
output$form1<-renderUI({
tagList(
column(width=6,selectInput("samplevalue","Select Custom Source*",choices=c("Please select",samplevaluedata))),
column(width=6,textInput("sampletext",label = "Enter Text",value = NULL,placeholder = NULL)))
})
on_click_js = "Shiny.onInputChange('mydata', '%s');
$('#FormModal').modal('show')"
convert_to_link = function(x) {
as.character(tags$a(href = "#", onclick = sprintf(on_click_js,x), x))
}
observeEvent(input$view,{
session$sendCustomMessage(type = "unbinding_table_elements", "my_table")
output$my_table <- DT::renderDataTable({
a=dbGetQuery(hcltcprod,paste0("select name,mobile,email,assignedto from public.tempnew order by 3;"))
a <- data.frame(a,row.names = NULL)
a$email <- sapply(a$email,convert_to_link)
a1 <- datatable(a,
escape = F,
options = list(paging = FALSE, ordering = FALSE, searching = FALSE, rownames = FALSE,
preDrawCallback = JS('function() { Shiny.unbindAll(this.api().table().node());}'),
drawCallback = JS('function() { Shiny.bindAll(this.api().table().node()); } ')))
a1
})
})
observeEvent(input$my_table_cell_clicked, {
print(Sys.time())
})
observe({
if(input$savepage2==0)
return()
isolate({
for(i in 1:nrow(a))
dbGetQuery(hcltcprod,paste0("update public.tempnew set s_text='",input$samplevalue,"',s_value='",input$sampletext,"' where mobile in ('",a$email,"');"))
})
})
}

Answer 1

As your example is connected to database and you didnt provide sample data I will go with mtcars dataset. Building on the example in the link you can view the selected data using the following:
rm(list = ls())
library(DT)
library(shiny)
library(shinyBS)
library(shinyjs)
library(shinydashboard)
# This function will create the buttons for the datatable, they will be unique
shinyInput <- function(FUN, len, id, ...) {inputs <- character(len)
for (i in seq_len(len)) {
inputs[i] <- as.character(FUN(paste0(id, i), ...))}
inputs
}
ui <- dashboardPage(
dashboardHeader(title = "Simple App"),
dashboardSidebar(
sidebarMenu(id = "tabs",
menuItem("Menu Item 1", tabName = "one", icon = icon("dashboard"))
)
),
dashboardBody(
tabItems(
tabItem(tabName = "one",h2("Datatable Modal Popup"),
DT::dataTableOutput('my_table'),uiOutput("popup")
)
)
)
)
server <- function(input, output, session) {
my_data <- reactive({
testdata <- mtcars
as.data.frame(cbind(View = shinyInput(actionButton, nrow(testdata),'button_', label = "View", onclick = 'Shiny.onInputChange(\"select_button\", this.id)' ),testdata))
})
output$my_table <- DT::renderDataTable(my_data(),selection = 'single',options = list(searching = FALSE,pageLength = 10),server = FALSE, escape = FALSE,rownames= FALSE)
# Here I created a reactive to save which row was clicked which can be stored for further analysis
SelectedRow <- eventReactive(input$select_button,{
as.numeric(strsplit(input$select_button, "_")[[1]][2])
})
# This is needed so that the button is clicked once for modal to show, a bug reported here
# https://github.com/ebailey78/shinyBS/issues/57
observeEvent(input$select_button, {
toggleModal(session, "modalExample", "open")
})
DataRow <- eventReactive(input$select_button,{
my_data()[SelectedRow(),2:ncol(my_data())]
})
output$popup <- renderUI({
bsModal("modalExample", paste0("Data for Row Number: ",SelectedRow()), "", size = "large",
column(12,
DT::renderDataTable(DataRow())
)
)
})
}
shinyApp(ui, server)