这个时间戳脚本有什么问题？

Question

I have a time stamp script giving the error: Cannot read property "source" from undefined. (line 3, file "Code")

I have looked into seeing if the problem was on line 1 function onEdit(e) and based off of sources I was reading, I can't run this from the script editor. Is line 1 indeed the culprit to this error?

function onEdit(e)
{
  var sheet = e.source.getActiveSheet();
  if (sheet.getName() == "Sheet1") //Name of sheet
  {
    var actRng = sheet.getActiveRange();
    var editColumn = actRng.getColumn();
    var rowIndex = actRng.getRowIndex();
    var headers = sheet.getRange(1, 1, 1, sheet.getLastColumn()).getValues();
    var dateCol = headers[0].indexOf("Date & Time") + 1; // Name of Column you want to timestamp
    var orderCol = headers[0].indexOf("Input Field") + 1; // Name of Column you want to drop data
    if (dateCol > 0 && rowIndex > 1 && editColumn == orderCol)
    {
      sheet.getRange(rowIndex, dateCol).setValue(Utilities.formatDate(new Date(), "PST","hh:mm:ss aaa"));
    }
  }
}

I have a sample sheet here. https://docs.google.com/spreadsheets/d/1NcblMFTVPbKYPmfvh7YnfEHe3dl2QQp6HaC-dqtdiik/edit#gid=0

There are two headers (Column A) Date & Time and (Column B) Input Field. When Column B is editted, Column A should populate with a time stamp.

Answer 1

function onEdit(e) {
  var sh=e.range.getSheet();
  if (sh.getName()=="Sheet1"){
    var headers = sh.getRange(1,1,1,sh.getLastColumn()).getValues();
    var dateCol=headers[0].indexOf("Date & Time") + 1;
    var orderCol=headers[0].indexOf("Input Field") + 1
    if (dateCol>0 && e.range.rowStart>1 && e.range.columnStart==orderCol) {
      sh.getRange(e.range.rowStart, dateCol).setValue(Utilities.formatDate(new Date(), "PST","hh:mm:ss aaa"));
    }
  }
}

Nothing wrong with it. This takes use of the event object a little more. Remember, you can't run these functions from the script editor. They require the event object and without it they will fail because "e" is undefined. But the event object provides a lot of useful data.

Try adding Logger.log(JSON.stringify(e)); to the function like I did in your spreadsheet and you can see all of the data provided by the event object.

Answer 2

Thank you to everyone pointing out the big picture of how this script works. As it turns out, the problem was a set of cells causing the issue. I do not know how to convey the proper answer other than all I did was delete the cells on the 'column to add data' that was giving the issue, re-entered the data and the event triggered perfectly fine. Not sure what was going on with these cells but it appears they were the culprit. I left the sample sheet un-editted to see for yourself.

If you try to type in column B, rows 19 and 23, nothing will happen. If you multi-select 19 and 23 Column B, delete, and enter data, it will work.