Downloading a Nested DT table in Shiny - r

Question

I've got a nested DT table in my Shiny app. The child table is a list that gets passed and rendered into the table. When I go to add a download button via DT's built in method, the output contains the parent table data and then a list of [Object][Object].. instead of the actual child data.
Do I have to write my own downloadable button method instead of using DT's method or is there a original DT method that helps with this? Haven't found a solution yet.
Data
Parent
structure(list(Market = c("ABILENE, TX", "AKRON, OH"), `SQAD CPP ($)` = c(10,
49), `SQAD CPM ($)` = c(22, 30), `Override CPP ($)` = c(0, 0),
`Override CPM ($)` = c(0, 0)), .Names = c("Market", "SQAD CPP ($)",
"SQAD CPM ($)", "Override CPP ($)", "Override CPM ($)"), row.names = c(NA,
-2L), class = "data.frame")
Child
structure(list(Market = c("ABILENE, TX", "ABILENE, TX", "ABILENE, TX",
"ABILENE, TX", "ABILENE, TX", "ABILENE, TX", "ABILENE, TX", "ABILENE, TX",
"ABILENE, TX", "AKRON, OH", "AKRON, OH", "AKRON, OH", "AKRON, OH",
"AKRON, OH", "AKRON, OH", "AKRON, OH", "AKRON, OH", "AKRON, OH"
), Daypart = c(" Podcast", " Streaming/Digital Audio", "Afternoon Drive",
"Daytime", "Evening", "Mon-Fri Average", "Mon-Sun Average", "Morning Drive",
"Weekend", " Podcast", " Streaming/Digital Audio", "Afternoon Drive",
"Daytime", "Evening", "Mon-Fri Average", "Mon-Sun Average", "Morning Drive",
"Weekend"), `Mix (%)` = c(10L, 10L, 10L, 10L, 10L, 10L, 5L, 15L,
10L, 10L, 10L, 10L, 10L, 10L, 10L, 5L, 15L, 10L), `Spot:60 (%)` = c(4,
4, 4, 4, 4, 4, 2, 6, 4, 4, 4, 4, 4, 4, 4, 2, 6, 4), `Spot:30 (%)` = c(6,
6, 6, 6, 6, 6, 3, 9, 6, 6, 6, 6, 6, 6, 6, 3, 9, 6), `SQAD CPP ($)` = c(10,
6, 27, 31, 44, 32, 31, 26, 26, 34, 21, 170, 156, 112, 151, 136,
177, 95), `SQAD CPM ($)` = c(21, 13, 57.6, 64.8, 93.6, 68.4,
64.8, 54, 54, 21, 13, 104.5, 96.1, 69, 93, 83.6, 108.7, 58.5),
`Override CPP ($)` = c(10, 6, 27, 31, 44, 32, 31, 26, 26,
34, 21, 170, 156, 112, 151, 136, 177, 95), `Override CPM ($)` = c(21,
13, 57.63, 64.83, 93.64, 68.43, 64.83, 54.03, 54.03, 21,
13, 104.49, 96.13, 68.96, 92.99, 83.59, 108.67, 58.51), population = c(47200L,
47200L, 47200L, 47200L, 47200L, 47200L, 47200L, 47200L, 47200L,
162700L, 162700L, 162700L, 162700L, 162700L, 162700L, 162700L,
162700L, 162700L), slider_60s = c(0.4, 0.4, 0.4, 0.4, 0.4,
0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4, 0.4,
0.4), slider_30s = c(0.6, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6,
0.6, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6)), .Names = c("Market",
"Daypart", "Mix (%)", "Spot:60 (%)", "Spot:30 (%)", "SQAD CPP ($)",
"SQAD CPM ($)", "Override CPP ($)", "Override CPM ($)", "population",
"slider_60s", "slider_30s"), class = "data.frame", row.names = c(NA,
-18L))
Code
# Bind the market level and mix breakout data together for the final table
market_mix_table <- reactive({
# Take a dependency on input$goButton
input$goButton
isolate({
markets <- market_costings_gross_net()
mix_breakout <- mix_breakout_digital_elements()
# Make the dataframe
# This must be met length(children) == nrow(dat)
Dat <- NestedData(
dat = markets,
children = split(mix_breakout, mix_breakout$Market)
)
return(Dat)
})
})
# Render the table
output$daypartTable <- DT::renderDataTable({
Server = FALSE
# Whether to show row names (set TRUE or FALSE)
rowNames <- FALSE
colIdx <- as.integer(rowNames)
# The data
Dat <- market_mix_table()
parentRows <- which(Dat[,1] != "")
callback_js = JS(
"var ok = true;",
"function onUpdate(updatedCell, updatedRow, oldValue) {",
" var column = updatedCell.index().column;",
" if(column === 8){",
" ok = false;",
" }else if(column === 7){",
" ok = true;",
" }",
"}",
sprintf("var parentRows = [%s];", toString(parentRows-1)),
sprintf("var j0 = %d;", colIdx),
"var nrows = table.rows().count();",
"for(var i=0; i < nrows; ++i){",
" if(parentRows.indexOf(i) > -1){",
" table.cell(i,j0).nodes().to$().css({cursor: 'pointer'});",
" }else{",
" table.cell(i,j0).nodes().to$().removeClass('details-control');",
" }",
"}",
"",
"// make the table header of the nested table",
"var format = function(d, childId){",
" if(d != null){",
" var html = ",
" '<table class=\"display compact hover\" ' + ",
" 'style=\"padding-left: 30px;\" id=\"' + childId + '\"><thead><tr>';",
" for(var key in d[d.length-1][0]){",
" html += '<th>' + key + '</th>';",
" }",
" html += '</tr></thead><tfoot><tr>'",
" for(var key in d[d.length-1][0]){",
" html += '<th></th>';",
" }",
" return html + '</tr></tfoot></table>';",
" } else {",
" return '';",
" }",
"};",
"",
"// row callback to style the rows of the child tables",
"var rowCallback = function(row, dat, displayNum, index){",
" if($(row).hasClass('odd')){",
" $(row).css('background-color', 'white');",
" $(row).hover(function(){",
" $(this).css('background-color', 'lightgreen');",
" }, function() {",
" $(this).css('background-color', 'white');",
" });",
" } else {",
" $(row).css('background-color', 'white');",
" $(row).hover(function(){",
" $(this).css('background-color', 'lightblue');",
" }, function() {",
" $(this).css('background-color', 'white');",
" });",
" }",
"};",
"",
"// header callback to style the header of the child tables",
"var headerCallback = function(thead, data, start, end, display){",
" $('th', thead).css({",
" 'color': 'black',",
" 'background-color': 'white'",
" });",
"};",
"",
"// make the datatable",
"var format_datatable = function(d, childId, rowIdx){",
" // footer callback to display the totals",
" // and update the parent row",
" var footerCallback = function(tfoot, data, start, end, display){",
" $('th', tfoot).css('background-color', '#F5F2F2');",
" var api = this.api();",
"// update the Override CPM when the Override CPP is changed",
" var col_override_cpp = api.column(7).data();",
" var col_population = api.column(9).data();",
" if(ok){",
" for(var i = 0; i < col_override_cpp.length; i++){",
" api.cell(i,8).data(((parseInt(col_override_cpp[i])*100)/(parseInt(col_population[i])/1000)).toFixed(0));",
" }",
" }",
"// update the Override CPP when the Override CPM is changed",
" var col_override_cpm = api.column(8).data();",
" for(var i = 0; i < col_override_cpm.length; i++){",
" api.cell(i,7).data(((parseInt(col_override_cpm[i])*parseInt(col_population[i])/1000)/(100)).toFixed(0));",
" }",
"// Update the spot mixes",
" var col_mix_percentage = api.column(2).data();",
" var col_mix60_mix30 = api.column(10).data();",
" var col_mix30_mix15 = api.column(11).data();",
" for(var i = 0; i < col_mix_percentage.length; i++){",
" api.cell(i,3).data((parseFloat(col_mix_percentage[i])*parseFloat(col_mix60_mix30[i])).toFixed(1));",
" api.cell(i,4).data((parseFloat(col_mix_percentage[i])*parseFloat(col_mix30_mix15[i])).toFixed(1));",
" }",
"// Make the footer sums",
" api.columns().eq(0).each(function(index){",
" if(index == 0) return $(api.column(index).footer()).html('Mix Total');",
" var coldata = api.column(index).data();",
" var total = coldata",
" .reduce(function(a, b){return parseInt(a) + parseInt(b)}, 0);",
" if(index == 3 || index == 4 ||index == 5 || index == 6 || index==7 || index==8) {",
" $(api.column(index).footer()).html('');",
" } else {",
" $(api.column(index).footer()).html(total);",
" }",
" if(total == 100) {",
" $(api.column(index).footer()).css({'color': 'green'});",
" } else {",
" $(api.column(index).footer()).css({'color': 'red'});",
" }",
" })",
" // update the parent row",
" var col_share = api.column(2).data();",
" var col_CPP = api.column(5).data();",
" var col_CPM = api.column(6).data();",
" var col_Historical_CPP = api.column(7).data();",
" var col_Historical_CPM = api.column(8).data();",
" var CPP = 0, CPM = 0, Historical_CPP = 0, Historical_CPM = 0;",
" for(var i = 0; i < col_share.length; i++){",
" CPP += (parseInt(col_share[i])*parseInt(col_CPP[i]).toFixed(0));",
" CPM += (parseInt(col_share[i])*parseInt(col_CPM[i]).toFixed(0));",
" Historical_CPP += (parseInt(col_share[i])*parseInt(col_Historical_CPP[i]).toFixed(0));",
" Historical_CPM += (parseInt(col_share[i])*parseInt(col_Historical_CPM[i]).toFixed(0));",
" }",
" table.cell(rowIdx, j0+2).data((CPP/100).toFixed(2));",
" table.cell(rowIdx, j0+3).data((CPM/100).toFixed(2));",
" table.cell(rowIdx, j0+4).data((Historical_CPP/100).toFixed(2));",
" table.cell(rowIdx, j0+5).data((Historical_CPM/100).toFixed(2));",
" }",
" var dataset = [];",
" var n = d.length - 1;",
" for(var i = 0; i < d[n].length; i++){",
" var datarow = $.map(d[n][i], function (value, index) {",
" return [value];",
" });",
" dataset.push(datarow);",
" }",
" var id = 'table#' + childId;",
" if (Object.keys(d[n][0]).indexOf('_details') === -1) {",
" var subtable = $(id).DataTable({",
" 'data': dataset,",
" 'autoWidth': true,",
" 'deferRender': true,",
" 'info': false,",
" 'lengthChange': false,",
" 'ordering': d[n].length > 1,",
" 'order': [],",
" 'paging': true,",
" 'scrollX': false,",
" 'scrollY': false,",
" 'searching': false,",
" 'sortClasses': false,",
" 'pageLength': 50,",
" 'rowCallback': rowCallback,",
" 'headerCallback': headerCallback,",
" 'footerCallback': footerCallback,",
" 'columnDefs': [",
" {targets: [0, 9, 10, 11], visible: false},",
" {targets: '_all', className: 'dt-center'}",
" ]",
" });",
" } else {",
" var subtable = $(id).DataTable({",
" 'data': dataset,",
" 'autoWidth': true,",
" 'deferRender': true,",
" 'info': false,",
" 'lengthChange': false,",
" 'ordering': d[n].length > 1,",
" 'order': [],",
" 'paging': true,",
" 'scrollX': false,",
" 'scrollY': false,",
" 'searching': false,",
" 'sortClasses': false,",
" 'pageLength': 50,",
" 'rowCallback': rowCallback,",
" 'headerCallback': headerCallback,",
" 'footerCallback': footerCallback,",
" 'columnDefs': [",
" {targets: [0, 9, 10, 11], visible: false},",
" {targets: -1, visible: false},",
" {targets: 0, orderable: false, className: 'details-control'},",
" {targets: '_all', className: 'dt-center'}",
" ]",
" }).column(0).nodes().to$().css({cursor: 'pointer'});",
" }",
" subtable.MakeCellsEditable({",
" onUpdate: onUpdate,",
" inputCss: 'my-input-class',",
" columns: [2, 7, 8],",
" confirmationButton: {",
" confirmCss: 'my-confirm-class',",
" cancelCss: 'my-cancel-class'",
" }",
" });",
"};",
"",
"// display the child table on click",
"var children = [];", # array to store the id's of the already created child tables
"table.on('click', 'td.details-control', function(){",
" var tbl = $(this).closest('table'),",
" tblId = tbl.attr('id'),",
" td = $(this),",
" row = $(tbl).DataTable().row(td.closest('tr')),",
" rowIdx = row.index();",
" if(row.child.isShown()){",
" row.child.hide();",
" td.html('<img src=\"https://raw.githubusercontent.com/DataTables/DataTables/master/examples/resources/details_open.png\"/>');",
" } else {",
" var childId = tblId + '-child-' + rowIdx;",
" if(children.indexOf(childId) === -1){", # this child table has not been created yet
" children.push(childId);",
" row.child(format(row.data(), childId)).show();",
" td.html('<img src=\"https://raw.githubusercontent.com/DataTables/DataTables/master/examples/resources/details_close.png\"/>');",
" format_datatable(row.data(), childId, rowIdx);",
" }else{",
" row.child(true);",
" td.html('<img src=\"https://raw.githubusercontent.com/DataTables/DataTables/master/examples/resources/details_close.png\"/>');",
" }",
" }",
"});"
)
# Table
table <- DT::datatable(
Dat,
callback = callback_js,
rownames = rowNames,
escape = -colIdx-1,
style = "bootstrap4",
extensions = 'Buttons',
options = list(
dom = "Blfrtip",
buttons = list("copy",
list(
extend = "collection",
buttons = "csv",
text = "Download"
)
),
lengthMenu = list(c(-1, 10, 20),
c("All", 10, 20)),
columnDefs = list(
list(width = '30px', targets = 0),
list(width = '545px', targets = 1),
list(visible = FALSE, targets = ncol(Dat)-1+colIdx),
list(orderable = FALSE, className = 'details-control', targets = colIdx),
list(className = "dt-center", targets = "_all")
)
)
)
# Call the html tools deps (js & css files in this directory)
cell_edit_dep <- htmltools::htmlDependency(
"CellEdit", "1.0.19",
src = 'www/',
script = "dataTables.cellEdit.js",
stylesheet = "dataTables.cellEdit.css"
)
table$dependencies <- c(table$dependencies, list(cell_edit_dep))
table %>% formatStyle(
c('Market', 'SQAD CPP ($)', 'SQAD CPM ($)', 'Override CPP ($)', 'Override CPM ($)'),
target = 'row',
backgroundColor = "#F5F2F2"
)
})

Answer 1

Try this:
js <- c(
"function(xlsx) {",
" var table = $('#daypartTable').find('table').DataTable();",
" // Letters for Excel columns.",
" var LETTERS = [",
" 'A','B','C','D','E','F','G','H','I','J','K','L','M',",
" 'N','O','P','Q','R','S','T','U','V','W','X','Y','Z'",
" ];",
" // Get sheet.",
" var sheet = xlsx.xl.worksheets['sheet1.xml'];",
" // Get a clone of the sheet data. ",
" var sheetData = $('sheetData', sheet).clone();",
" // Clear the current sheet data for appending rows.",
" $('sheetData', sheet).empty();",
" // Row count in Excel sheet.",
" var rowCount = 1;",
" // Iterate each row in the sheet data.",
" $(sheetData).children().each(function (index) {",
" // Used for DT row() API to get child data.",
" var rowIndex = index - 2;", #
" // Don't process row if its the header row.",
sprintf(" if (index > 1 && index < %d) {", nrow(Dat)+2), #
" // Get row",
" var row = $(this.outerHTML);",
" // Set the Excel row attr to the current Excel row count.",
" row.attr('r', rowCount);",
" // Iterate each cell in the row to change the row number.",
" row.children().each(function (index) {",
" var cell = $(this);",
" // Set each cell's row value.",
" var rc = cell.attr('r');",
" rc = rc.replace(/\\d+$/, \"\") + rowCount;",
" cell.attr('r', rc);",
" });",
" // Get the row HTML and append to sheetData.",
" row = row[0].outerHTML;",
" $('sheetData', sheet).append(row);",
" rowCount++;",
" // Get the child data - could be any data attached to the row.",
sprintf(" var childData = table.row(':eq(' + rowIndex + ')').data()[%d];", ncol(Dat)-1), #
" if (childData.length > 0) {",
" var colNames = Object.keys(childData[0]);",
" // Prepare Excel formatted row",
" headerRow = '<row r=\"' + rowCount +",
" '\"><c t=\"inlineStr\" r=\"A' + rowCount +",
" '\"><is><t></t></is></c>';",
" for(var i = 0; i < colNames.length; i++){",
" headerRow = headerRow +",
" '<c t=\"inlineStr\" r=\"' + LETTERS[i+1] + rowCount +",
" '\" s=\"7\"><is><t>' + colNames[i] +",
" '</t></is></c>';",
" }",
" headerRow = headerRow + '</row>';",
" // Append header row to sheetData.",
" $('sheetData', sheet).append(headerRow);",
" rowCount++; // Inc excelt row counter.",
" }",
" // The child data is an array of rows",
" for (c = 0; c < childData.length; c++) {",
" // Get row data.",
" child = childData[c];",
" // Prepare Excel formatted row",
" var colNames = Object.keys(child);",
" childRow = '<row r=\"' + rowCount +",
" '\"><c t=\"inlineStr\" r=\"A' + rowCount +",
" '\"><is><t></t></is></c>';",
" for(var i = 0; i < colNames.length; i++){",
" childRow = childRow +",
" '<c t=\"inlineStr\" r=\"' + LETTERS[i+1] + rowCount +",
" '\" s=\"5\"><is><t>' + child[colNames[i]] +",
" '</t></is></c>';",
" }",
" childRow = childRow + '</row>';",
" // Append row to sheetData.",
" $('sheetData', sheet).append(childRow);",
" rowCount++; // Inc excel row counter.",
" }",
" // Just append the header row and increment the excel row counter.",
" } else {",
" $('sheetData', sheet).append(this.outerHTML);",
" rowCount++;",
" }",
" });",
"}"
)
datatable(
Dat, callback = callback, rownames = rowNames, escape = -colIdx-1,
extensions = "Buttons",
options = list(
dom = "Bfrtip",
columnDefs = list(
list(visible = FALSE, targets = ncol(Dat)-1+colIdx),
list(orderable = FALSE, className = 'details-control', targets = colIdx),
list(className = "dt-center", targets = "_all")
),
buttons = list(
list(
extend = "excel",
exportOptions = list(
orthogonal = "export",
columns = 0:(ncol(Dat)-2)
),
orientation = "landscape",
customize = JS(js)
)
)
)
)
Here is an example of the generated Excel file:
EDIT
Better:
excelTitle <- NULL # set to NULL if you don't want a title
js <- c(
"function(xlsx) {",
" var table = $('#daypartTable').find('table').DataTable();",
" // Number of columns.",
" var ncols = table.columns().count();",
" // Is there a title?",
sprintf(" var title = %s;", ifelse(is.null(excelTitle), "false", "true")),
" // Integer to Excel column: 0 -> A, 1 -> B, ..., 25 -> Z, 26 -> AA, ...",
" var XLcolumn = function(j){", # https://codegolf.stackexchange.com/a/163919
" return j < 0 ? '' : XLcolumn(j/26-1) + String.fromCharCode(j % 26 + 65);",
" };",
" // Get sheet.",
" var sheet = xlsx.xl.worksheets['sheet1.xml'];",
" // Get a clone of the sheet data. ",
" var sheetData = $('sheetData', sheet).clone();",
" // Clear the current sheet data for appending rows.",
" $('sheetData', sheet).empty();",
" // Row count in Excel sheet.",
" var rowCount = 1;",
" // Iterate each row in the sheet data.",
" $(sheetData).children().each(function (index) {",
" // Used for DT row() API to get child data.",
" var rowIndex = title ? index - 2 : index - 1;",
" // Don't process row if it's the title row or the header row.",
" var i0 = title ? 1 : 0;",
" if (index > i0) {",
" // Get row",
" var row = $(this.outerHTML);",
" // Set the Excel row attr to the current Excel row count.",
" row.attr('r', rowCount);",
" // Iterate each cell in the row to change the row number.",
" row.children().each(function (index) {",
" var cell = $(this);",
" // Set each cell's row value.",
" var rc = cell.attr('r');",
" rc = rc.replace(/\\d+$/, \"\") + rowCount;",
" cell.attr('r', rc);",
" });",
" // Get the row HTML and append to sheetData.",
" row = row[0].outerHTML;",
" $('sheetData', sheet).append(row);",
" rowCount++;",
" // Get the child data - could be any data attached to the row.",
" var childData = table.row(':eq(' + rowIndex + ')').data()[ncols-1];",
" if (childData.length > 0) {",
" var colNames = Object.keys(childData[0]);",
" // Prepare Excel formatted row",
" var headerRow = '<row r=\"' + rowCount +",
" '\"><c t=\"inlineStr\" r=\"A' + rowCount +",
" '\"><is><t></t></is></c>';",
" for(let i = 0; i < colNames.length; i++){",
" headerRow = headerRow +",
" '<c t=\"inlineStr\" r=\"' + XLcolumn(i+1) + rowCount +",
" '\" s=\"7\"><is><t>' + colNames[i] +",
" '</t></is></c>';",
" }",
" headerRow = headerRow + '</row>';",
" // Append header row to sheetData.",
" $('sheetData', sheet).append(headerRow);",
" rowCount++; // Inc excel row counter.",
" }",
" // The child data is an array of rows",
" for(let c = 0; c < childData.length; c++){",
" // Get row data.",
" var child = childData[c];",
" // Prepare Excel formatted row",
" var childRow = '<row r=\"' + rowCount +",
" '\"><c t=\"inlineStr\" r=\"A' + rowCount +",
" '\"><is><t></t></is></c>';",
" var i = 0;",
" for(let colname in child){",
" childRow = childRow +",
" '<c t=\"inlineStr\" r=\"' + XLcolumn(i+1) + rowCount +",
" '\" s=\"5\"><is><t>' + child[colname] +",
" '</t></is></c>';",
" i++;",
" }",
" childRow = childRow + '</row>';",
" // Append row to sheetData.",
" $('sheetData', sheet).append(childRow);",
" rowCount++; // Inc excel row counter.",
" }",
" // Just append the header row and increment the excel row counter.",
" } else {",
" $('sheetData', sheet).append(this.outerHTML);",
" rowCount++;",
" }",
" });",
"}"
)
datatable(
Dat, callback = callback, rownames = rowNames, escape = -colIdx-1,
extensions = "Buttons",
options = list(
dom = "Bfrtip",
columnDefs = list(
list(visible = FALSE, targets = ncol(Dat)-1+colIdx),
list(orderable = FALSE, className = 'details-control', targets = colIdx),
list(className = "dt-center", targets = "_all")
),
buttons = list(
list(
extend = "excel",
exportOptions = list(
orthogonal = "export",
columns = 0:(ncol(Dat)-2)
),
title = excelTitle,
orientation = "landscape",
customize = JS(js)
)
)
)
)
EDIT 2
In callback_js, replace
" var dataset = [];",
" var n = d.length - 1;",
" for(var i = 0; i < d[n].length; i++){",
" var datarow = $.map(d[n][i], function (value, index) {",
" return [value];",
" });",
" dataset.push(datarow);",
" }",
" var id = 'table#' + childId;",
" if (Object.keys(d[n][0]).indexOf('_details') === -1) {",
" var subtable = $(id).DataTable({",
" 'data': dataset,",
" 'autoWidth': true,",
" 'deferRender': true,",
" 'info': false,",
" 'lengthChange': false,",
" 'ordering': d[n].length > 1,",
" 'order': [],",
" 'paging': true,",
" 'scrollX': false,",
" 'scrollY': false,",
" 'searching': false,",
" 'sortClasses': false,",
" 'pageLength': 50,",
" 'rowCallback': rowCallback,",
" 'headerCallback': headerCallback,",
" 'footerCallback': footerCallback,",
" 'columnDefs': [",
" {targets: [0, 9, 10, 11], visible: false},",
" {targets: '_all', className: 'dt-center'}",
" ]",
" });",
" } else {",
" var subtable = $(id).DataTable({",
" 'data': dataset,",
" 'autoWidth': true,",
" 'deferRender': true,",
" 'info': false,",
" 'lengthChange': false,",
" 'ordering': d[n].length > 1,",
" 'order': [],",
" 'paging': true,",
" 'scrollX': false,",
" 'scrollY': false,",
" 'searching': false,",
" 'sortClasses': false,",
" 'pageLength': 50,",
" 'rowCallback': rowCallback,",
" 'headerCallback': headerCallback,",
" 'footerCallback': footerCallback,",
" 'columnDefs': [",
" {targets: [0, 9, 10, 11], visible: false},",
" {targets: -1, visible: false},",
" {targets: 0, orderable: false, className: 'details-control'},",
" {targets: '_all', className: 'dt-center'}",
" ]",
" }).column(0).nodes().to$().css({cursor: 'pointer'});",
" }",
with
" var n = d.length - 1;",
" var id = 'table#' + childId;",
" var columns = Object.keys(d[n][0]).map(function(x){",
" return {data: x, title: x};",
" });",
" if (Object.keys(d[n][0]).indexOf('_details') === -1) {",
" var subtable = $(id).DataTable({",
" 'data': d[n],",
" 'columns': columns,",
" 'autoWidth': true,",
" 'deferRender': true,",
" 'info': false,",
" 'lengthChange': false,",
" 'ordering': d[n].length > 1,",
" 'order': [],",
" 'paging': true,",
" 'scrollX': false,",
" 'scrollY': false,",
" 'searching': false,",
" 'sortClasses': false,",
" 'pageLength': 50,",
" 'rowCallback': rowCallback,",
" 'headerCallback': headerCallback,",
" 'footerCallback': footerCallback,",
" 'columnDefs': [",
" {targets: [0, 9, 10, 11], visible: false},",
" {targets: '_all', className: 'dt-center'}",
" ]",
" });",
" } else {",
" var subtable = $(id).DataTable({",
" 'data': d[n],",
" 'columns': columns,",
" 'autoWidth': true,",
" 'deferRender': true,",
" 'info': false,",
" 'lengthChange': false,",
" 'ordering': d[n].length > 1,",
" 'order': [],",
" 'paging': true,",
" 'scrollX': false,",
" 'scrollY': false,",
" 'searching': false,",
" 'sortClasses': false,",
" 'pageLength': 50,",
" 'rowCallback': rowCallback,",
" 'headerCallback': headerCallback,",
" 'footerCallback': footerCallback,",
" 'columnDefs': [",
" {targets: [0, 9, 10, 11], visible: false},",
" {targets: -1, visible: false},",
" {targets: 0, orderable: false, className: 'details-control'},",
" {targets: '_all', className: 'dt-center'}",
" ]",
" }).column(0).nodes().to$().css({cursor: 'pointer'});",
" }",
Moreover, you probably don't want the hidden columns in the Excel file. So replace this code:
" if (childData.length > 0) {",
" var colNames = Object.keys(childData[0]);",
" // Prepare Excel formatted row",
......
" // Append row to sheetData.",
" $('sheetData', sheet).append(childRow);",
" rowCount++; // Inc excel row counter.",
" }",
with
" if (childData.length > 0) {",
" var colNames = Object.keys(childData[0]).slice(1,9);",
" // Prepare Excel formatted row",
" var headerRow = '<row r=\"' + rowCount +",
" '\"><c t=\"inlineStr\" r=\"A' + rowCount +",
" '\"><is><t></t></is></c>';",
" for(let i = 0; i < colNames.length; i++){",
" headerRow = headerRow +",
" '<c t=\"inlineStr\" r=\"' + XLcolumn(i+1) + rowCount +",
" '\" s=\"7\"><is><t>' + colNames[i] +",
" '</t></is></c>';",
" }",
" headerRow = headerRow + '</row>';",
" // Append header row to sheetData.",
" $('sheetData', sheet).append(headerRow);",
" rowCount++; // Inc excel row counter.",
" }",
" // The child data is an array of rows",
" for(let c = 0; c < childData.length; c++){",
" // Get row data.",
" var child = childData[c];",
" // Prepare Excel formatted row",
" var childRow = '<row r=\"' + rowCount +",
" '\"><c t=\"inlineStr\" r=\"A' + rowCount +",
" '\"><is><t></t></is></c>';",
" for(let i = 0; i < colNames.length; i++){",
" childRow = childRow +",
" '<c t=\"inlineStr\" r=\"' + XLcolumn(i+1) + rowCount +",
" '\" s=\"5\"><is><t>' + child[colNames[i]] +",
" '</t></is></c>';",
" }",
" childRow = childRow + '</row>';",
" // Append row to sheetData.",
" $('sheetData', sheet).append(childRow);",
" rowCount++; // Inc excel row counter.",
" }",
EDIT 3
This doesn't work if there are some periods in the column names of a child table. Here is the fix:
" var columns = Object.keys(d[n][0]).map(function(x){",
" return {data: x.replace('.', '\\\\\\.'), title: x};",
" });",