通过Google脚本发送电子邮件时引用Google表格超链接

Question

我正在使用Google脚本将电子邮件发送到电子邮件列表。电子邮件列表的一个字段包括为每个收件人定制的超链接。因此，我需要将包含在Google表格中的自定义超链接作为电子邮件的一部分。

function sendEmails() {

    // Set the spreadsheet file we are sending from: 
    var sheetname = SpreadsheetApp.openById('<google sheet url>');  

    // Set the sheet we are sending from:
    var sheet = sheetname.getSheetByName('Send Emails');

    // Set the first row of data in the list:
    var startRow = 2;

    // Set the number of rows of data in the list:
    var numRows = 2; 

    // Fetch the range of cells desired, using formula {first row}, {first column}, {number of rows}, {number of columns}:
    var dataRange = sheet.getRange(startRow, 8, numRows, 3);

    // Loop through each row in the range set defined above, sending an email based on the values in each row:
    var data = dataRange.getValues();
    for (i in data) {
      var row = data[i];
      var emailAddress = row[0]; // First column identified by [0]
      var subject = row[1]; // Second column identified by [1]
      var html = row[2] + "<a href=" + row[3] + "> click here </a>";  // Third column identified by [2] and fourth by [3]
      GmailApp.sendEmail(emailAddress, subject, 'unused but required text',{htmlBody: html});
    }

    Browser.msgBox(numRows + ' emails were sent successfully.');
}

（在[3]引用的第四列中，每行都有自定义的超链接。）

因此，此代码中的大多数代码都可以正常工作，并且确实生成了链接，但是电子邮件中生成的链接URL为“ http://undefined/”。因此，出于某种原因，它没有从[3]引用的列中获取超链接URL。它取代了“ undefined”