尝试...捕获在 Google Apps 脚本中未按预期工作

Question

[编辑以包含TJ Crowder建议的最小可重现示例。]

我正在使用 Google Apps 脚本开发一个简单的函数，该函数应该将日期或错误字符串发布到电子表格的列中。该列已具有拒绝任何非有效日期值的数据验证规则。这一切都很好。

我的问题是这样的：

我尝试使用 try...catch 块来优雅地处理错误，并在值未通过数据验证时仅记录错误消息。try...catch 似乎根本不起作用。相反，脚本会抛出错误并中断，并且日志显示为空。

这是带有新代码的更新屏幕截图（抱歉，Sourabh Choraria，覆盖了您的更新）。令人惊讶的是，GAS 突出显示了错误发生位置上方的一行。

作为一点背景知识，此脚本获取存储在列中的各种其他电子表格的 ID，获取每个电子表格的最后更新时间戳，并将结果发布到结果列中。

这是我使用的代码。

function trackDocUpdates() {
    //Set the global variables
    var ss = SpreadsheetApp.getActive();
    var residentSheet = ss.getSheetByName("Resident Documents");
    var activeRange = residentSheet.getDataRange();
    var numRows = activeRange.getNumRows();
    var lastRevision = "No value yet.";

    //Loop through the rows of data to get the last updated timestamp of each document
    //The first data row is the 5th row of the sheet currently, hence the for loop starts at 5
    for (i = 5; i <= numRows; i++) {
        //Get the document URL from the current row. Currently the second column has the document URLs
        var docURL = residentSheet.getRange(i, 2).getValue();
        //Extract the document's ID from the URL
            var docId = docURL.split("/")[5];
            //As long as there's a valid-looking document ID, get the last updated timestamp for the current document in the loop
            if (docId != undefined) {
                lastRevision = getLastRevision(docId);
                Logger.log(lastRevision);
            }

            else {
                lastRevision = "No document URL found";
                Logger.log(lastRevision);
            }
        //Post the last updated timestamp in the appropriate result cell
        postLastUpdatedTime(lastRevision, i, 9);
    }

    //Function to get the last updated timestamp for a given document
    function getLastRevision(docId) {
        //Try to get the last updated timestamp for the given document ID
        try {
            var revisions = Drive.Revisions.list(docId);
            if (revisions.items && revisions.items.length > 0) {
                var revision = revisions.items[revisions.items.length-1];
                var lastModified = new Date(revision.modifiedDate);
                //var modifiedDateString = Utilities.formatDate(lastModified, ss.getSpreadsheetTimeZone(), "MMM dd, yyyy hh:mm:ss a");
                return lastModified;
            }

            else {
                return 'No revisions found.';
            }
        }
        //If the file cannot be accessed for some reason (wrong docId, lack of permissions, etc.), return an appropriate message for posting in the result cell
        catch(err) {
            return "File cannot be accessed.";
        }

    }

    //Function to post the last updated timestamp for a given document in the given result cell
    function postLastUpdatedTime(message, rowIndex, colIndex) {
        //If there's no argument is passed to colIndex, set its value to be 11
        colIndex = colIndex || 11;
        var cellToPost = residentSheet.getRange(rowIndex, colIndex);
        try {
            cellToPost.setValue(message);
            cellToPost.setNumberFormat('MMM dd, yyyy hh:mm:ss AM/PM');
        }

        catch(err) {
            Logger.log(err);
            residentSheet.getRange(rowIndex, 12).setValue(err);
        }

    }

    //Update the last refreshed time of the script in the first row of the result column
    var scriptUpdatedTime = new Date();
    postLastUpdatedTime(scriptUpdatedTime, 1);
}

谁能帮助我理解我哪里出错了？

PS：我无权删除最初提出此问题的数据验证，因为我只是向客户现有的电子表格添加功能。

Answer 1

我能够重现你的问题。

这个确切的问题已报告给 Google (issuetracker.google.com)，并且他们提交了一份内部案例 [1]，内容涉及 Apps 脚本中的 try/catch 语句不处理数据验证错误。

[1] https://issuetracker.google.com/issues/36763134#comment7