TypeError: column.equivalentTo is not a function

Hi,

I have just encoutered this error since yersterday.

Can you please give me the “real reason” of that? What’s happened?

  var exportForApp = function (app_id, callback) {
  var wb = initializeWorkbook();
  var sheet = initializeWorksheet(wb, getSheetTabName());
  var headers = getExportHeaders();

  formService.findByAppWithGift(app_id, function (err, forms) {
    if (err) { callback(true, err); }
    else {
      for (var i in forms) {
        var row = {
          gender: forms[i].gender,
          first_name: forms[i].first_name,
          last_name: forms[i].last_name,
          email: forms[i].email,
          optin: forms[i].optin,
          prize: forms[i].gift_name
        };
        sheet.addRow(row);
      }

      var filePath = getExportFileName();
      var streamFile = fs.createWriteStream(filePath);
      streamFile.end();

      wb.xlsx.writeFile(filePath)
      .then(function() {
        callback(false, filePath);
      })
      .catch(function (err) {
        console.log(err);
        callback(true, err);
      });
    }
  });
}

// returns the export file name
function getExportFileName () {
  return format("%s/File-export-%s.xlsx", config.admin.exportStoragePath, moment().format(config.admin.exportDateFormat));
}

// returns the headers
function getExportHeaders () {
  return [
    { key: "gender", title: "Civilité" },
    { key: "first_name", title: "Prénom" },
    { key: "last_name", title: "Nom" },
    { key: "email", title: "Email" },
    { key: "optin", title: "Optin newsletter"},
    { key: "prize", title: "Gain" }
  ];
}

// returns the sheet tab name
function getSheetTabName () {
  return "Participants";
}

// intitialize the workbook and return it
function initializeWorkbook () {
  var wb = new xls.Workbook();
  wb.creator = "LOL";
  wb.created = new Date();
  wb.modified = new Date();
  return wb;
}

// initialize the worksheet and return it
function initializeWorksheet (workbook, name) {
  var sheet = workbook.addWorksheet(name);
  var headers = getExportHeaders();

  sheet.properties.outlineLevelCol = headers.length;
  sheet.properties.outlineLevelRow = headers.length > 0 ? 1 : 0;
  sheet.columns = [];

  for (var i in headers) {
    sheet.columns.push({ key: headers[i].key, header: headers[i].title, width: 40, outlineLevel: 1 });
  }

  return sheet;
}```

[kpsuperplane]

@christophedebatz it appears you have to dump the entire columns array into the columns property at once… I was pushing to it inplace before with a for loop… reassigned it into a variable, dumped it in all at once after, and it worked

[alberttomasiak]

@LVMuser You can’t use worksheet.columns.push(x) .

In order to make this work you can only define the columns once. So, to get it to work define a variable with your columns, add the extra ones afterwards and THEN define the columns on your worksheet:

const sheetColumns = [
  { header: 'name', key: 'name', width: 5 },
  { header: 'age', key: 'age', width: 10 },
];

sheetColumns.push(
  { header: 'gender', key: 'gender', width: 10}
);

worksheet.columns = sheetColumns;

EDIT: atleast I think you can’t use .push(x). Correct me if I’m wrong! Tried it myself but didn’t work, whereas defining it once, like suggested above, works 😃