Hey there! Let's dig into those deleteRow() and appendRow() issues you're hitting with your Google Apps Script email sender. It sounds like you've got the core email functionality working (great job on that!) but the row manipulation for your 2 users is acting wonky. Here are some common pitfalls and fixes to check out:

1. Common deleteRow() Gotchas When Handling Multiple Rows #

• Row Index Shifts: If you're looping through rows to delete them (like for your 2 users), deleting a row changes the index of all rows below it. For example, if you delete row 2 first, the original row 3 becomes row 2—so your next delete might skip a row or hit an out-of-bounds error.
  • Fix: Loop backwards from the last row to the first. Example:

    // Instead of looping forward (which causes index shifts)
    for (let i = 2; i <= lastRow; i++) {
      sheet.deleteRow(i);
    }
    // Loop backwards to avoid index issues
    for (let i = lastRow; i >= 2; i--) {
      sheet.deleteRow(i);
    }
    

• Incorrect Sheet Reference: Double-check that you're calling deleteRow() on the correct Sheet object (not the parent Spreadsheet). Make sure you have something like this at the start of your script:

  const sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("YourTargetSheet");
  

2. Troubleshooting appendRow() Issues #

• Data Mismatch: If the array you pass to appendRow() doesn't match the number of columns in your sheet (e.g., missing values or extra entries), it can cause unexpected behavior or errors. Ensure your data array aligns exactly with your sheet's column count.
  • Example: If your sheet has 4 columns, your array should look like ["user@example.com", "template2", "2024-10-07", "sent"]
• Race Conditions: If multiple scripts or users are accessing the sheet at the same time, you might hit locking issues. Use LockService to prevent concurrent edits:

  const lock = LockService.getScriptLock();
  try {
    lock.waitLock(10000); // Wait up to 10 seconds for access
    sheet.appendRow(yourUserDataArray);
  } finally {
    lock.releaseLock(); // Always release the lock when done
  }
  

3. Specific Tips for Your 2-User Scenario #

• Track Rows with Unique Identifiers: Instead of relying on row indices, use a unique value (like the user's email) to find and delete the correct rows. This avoids confusion if rows shift unexpectedly:

  const data = sheet.getDataRange().getValues();
  data.forEach((row, index) => {
    // Check if the row belongs to either of your two users
    if (row[0] === "user1@domain.com" || row[0] === "user2@domain.com") {
      sheet.deleteRow(index + 1); // +1 because arrays are 0-indexed, sheet rows are 1-indexed
    }
  });
  

• Validate dateMath Output: Make sure the next send date you calculate is in a format Google Sheets accepts (either a Date object or a string like "yyyy-MM-dd"). Invalid dates can cause appendRow() to insert messy data or throw errors.

4. Debugging Steps to Pinpoint the Issue #

• Log Everything: Add console.log() statements to check the row indices you're targeting, the data you're appending, and any error messages. You can view logs in the Apps Script editor under View > Logs:

  console.log("Attempting to delete row:", i);
  console.log("Data to append:", yourUserDataArray);
  

• Test with One User First: Temporarily comment out code for one user to isolate the problem. If it works for a single user, the issue might be in how you're handling the second user's row operations.

If you can share a snippet of your actual deleteRow/appendRow code, I can give even more targeted advice!

内容的提问来源于stack exchange，提问作者sblapray1014