我们有一张工作表，可以获取有关工作质量表格的数据。现在已经运行了一年以上，从那时起，工作表，表格或脚本完全没有改变。
但是由于某种原因，每当我们运行SendEmail函数时，我都会收到错误消息：
TypeError: Cannot read property "length" from null. (line 83, file "SendEmail")
这是现在发生错误的地方：
for (var i = 0; i < templateVars.length; ++i) {
无论何时运行脚本，第一列（项目）都应自动输入序列号。现在，这一切仍然保持空白，并且电子邮件模板再也不会通过电子邮件发送。
function SendEmail() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var dataSheet = ss.getSheets()[0];
var dataRange = dataSheet.getRange(2, 1, dataSheet.getMaxRows() - 1, 19);
var lastRow = dataSheet.getMaxRows();
for (var x = 0; x < dataSheet.getMaxRows() - 2; ++x) {
if(dataSheet.getRange(x+2, 3).getValue()!=""){
if(dataSheet.getRange(x+2, 15).getValue()==""){
var EMInum = dataSheet.getRange((x + 1), 1).getValue() + 1;
dataSheet.getRange(x+2, 1).setValue(EMInum);
dataSheet.getRange(x+2, 2).setFormula("=\"QoW-\"&text(A" + (x+2) + ",\"000\")");
dataSheet.getRange(x+2, 15).setFormula("=vlookup(I" + (x+2) + ",ContactDetails,2,0)");
dataSheet.getRange(x+2, 16).setFormula("=vlookup(I" + (x+2) + ",ContactDetails,3,0)");
dataSheet.getRange(x+2, 17).setFormula("=match(J" + (x+2) + ",CompanyName,1)");
dataSheet.getRange(x+2, 18).setFormula("=vlookup(I" + (x+2) + ",ContactDetails,Q" + (x+2) + ",0)");
dataSheet.getRange(x+2, 19).setFormula("=vlookup(I" + (x+2) + ",ContactDetails,Q" + (x+2) + "+1,0)");
dataSheet.getRange(x+2, 27).setFormula("=I" + (x+2)+ "&if(Z" + (x+2)+ "=\"\" ,\" OPEN\",\" CLOSED\")");
dataSheet.getRange(x+2, 28).setFormula("=if(right(AA" + (x+2) + ",4)=\"OPEN\",now()-datevalue(I" + (x+2)+ "),0)");
dataSheet.getRange(x+2, 29).setFormula("=if(AB" + (x+2) + "=0,\"e) Closed\",if(AB" + (x+2) + "<90,\"a) 0 - 90 days\",if(AB" + (x+2) + "<180,\"b) 90 - 180 days\",if(AB" + (x+2) + "<360,\"c) 180 - 360 days\",\"d) Over 360 days\"))))");
//Browser.msgBox("");
}
}
}
//
//
var templateSheet = ss.getSheets()[1];
var emailTemplate = templateSheet.getRange("A1").getValue();
var defaultCCAddress = templateSheet.getRange("B17").getValue(); // Added by zumzum as per projectid:a0CD000000xFxWQ
// Create one JavaScript object per row of data.
objects = getRowsData(dataSheet, dataRange);
// For every row object, create a personalized email from a template and send
// it to the appropriate person.
for (var i = 0; i < objects.length; ++i) {
// Get a row object
var rowData = objects[i];
// Generate a personalized email.
// Given a template string, replace markers (for instance ${"First Name"}) with
// the corresponding value in a row object (for instance rowData.firstName).
var emailText = fillInTemplateFromObject(emailTemplate, rowData);
var emailSubject = "NO REPLY: EM&I Quality of Work Issue Submission " + dataSheet.getRange(i + 2, 2).getValue();
var emailCheck = dataSheet.getRange(i + 2, 13).getValue();
//Browser.msgBox(emailCheck);
var emailAddress = dataSheet.getRange(i + 2, 18).getValue();
var ccemailAddress = dataSheet.getRange(i + 2, 15).getValue();
if(emailCheck=="")
{
/* original code commented by zumzum as per projectid:a0CD000000xFxWQ
MailApp.sendEmail(emailAddress, emailSubject, emailText,{cc:ccemailAddress+",david.mortlock@emialliance.com,peter.gresty@emialliance.com",bcc:"richard.priddes@emialliance.com"});
dataSheet.getRange(i + 2, 13).setValue("sent - " + Date());
*/
// Start od new code added by zumzum as per projectid:a0CD000000xFxWQ
MailApp.sendEmail(emailAddress, emailSubject, emailText,{cc:ccemailAddress+","+defaultCCAddress});
dataSheet.getRange(i + 2, 13).setValue("sent - " + Date());
// End of new code added by zumzum as per projectid:a0CD000000xFxWQ
}
}
}
// Replaces markers in a template string with values define in a JavaScript data object.
// Arguments:
// - template: string containing markers, for instance ${"Column name"}
// - data: JavaScript object with values to that will replace markers. For instance
// data.columnName will replace marker ${"Column name"}
// Returns a string without markers. If no data is found to replace a marker, it is
// simply removed.
function fillInTemplateFromObject(template, data) {
var email = template;
// Search for all the variables to be replaced, for instance ${"Column name"}
var templateVars = template.match(/\$\{\"[^\"]+\"\}/g);
// Replace variables from the template with the actual values from the data object.
// If no value is available, replace with the empty string.
for (var i = 1; i < templateVars.length; i++) {
// normalizeHeader ignores ${"} so we can call it directly here.
var variableData = data[normalizeHeader(templateVars[i])];
email = email.replace(templateVars[i], variableData || "");
}
return email;
}
//////////////////////////////////////////////////////////////////////////////////////////
//
// The code below is reused from the 'Reading Spreadsheet data using JavaScript Objects'
// tutorial.
//
//////////////////////////////////////////////////////////////////////////////////////////
// getRowsData iterates row by row in the input range and returns an array of objects.
// Each object contains all the data for a given row, indexed by its normalized column name.
// Arguments:
// - sheet: the sheet object that contains the data to be processed
// - range: the exact range of cells where the data is stored
// - columnHeadersRowIndex: specifies the row number where the column names are stored.
// This argument is optional and it defaults to the row immediately above range;
// Returns an Array of objects.
function getRowsData(sheet, range, columnHeadersRowIndex) {
columnHeadersRowIndex = columnHeadersRowIndex || range.getRowIndex() - 1;
var numColumns = range.getEndColumn() - range.getColumn() + 1;
var headersRange = sheet.getRange(columnHeadersRowIndex, range.getColumn(), 1, numColumns);
var headers = headersRange.getValues()[0];
return getObjects(range.getValues(), normalizeHeaders(headers));
}
// For every row of data in data, generates an object that contains the data. Names of
// object fields are defined in keys.
// Arguments:
// - data: JavaScript 2d array
// - keys: Array of Strings that define the property names for the objects to create
function getObjects(data, keys) {
var objects = [];
for (var i = 0; i < data.length; ++i) {
var object = {};
var hasData = false;
for (var j = 0; j < data[i].length; ++j) {
var cellData = data[i][j];
if (isCellEmpty(cellData)) {
continue;
}
object[keys[j]] = cellData;
hasData = true;
}
if (hasData) {
objects.push(object);
}
}
return objects;
}
// Returns an Array of normalized Strings.
// Arguments:
// - headers: Array of Strings to normalize
function normalizeHeaders(headers) {
var keys = [];
for (var i = 0; i < headers.length; ++i) {
var key = normalizeHeader(headers[i]);
if (key.length > 0) {
keys.push(key);
}
}
return keys;
}
// Normalizes a string, by removing all alphanumeric characters and using mixed case
// to separate words. The output will always start with a lower case letter.
// This function is designed to produce JavaScript object property names.
// Arguments:
// - header: string to normalize
// Examples:
// "First Name" -> "firstName"
// "Market Cap (millions) -> "marketCapMillions
// "1 number at the beginning is ignored" -> "numberAtTheBeginningIsIgnored"
function normalizeHeader(header) {
var key = "";
var upperCase = false;
for (var i = 0; i < header.length; ++i) {
var letter = header[i];
if (letter == " " && key.length > 0) {
upperCase = true;
continue;
}
if (!isAlnum(letter)) {
continue;
}
if (key.length == 0 && isDigit(letter)) {
continue; // first character must be a letter
}
if (upperCase) {
upperCase = false;
key += letter.toUpperCase();
} else {
key += letter.toLowerCase();
}
}
return key;
}
// Returns true if the cell where cellData was read from is empty.
// Arguments:
// - cellData: string
function isCellEmpty(cellData) {
return typeof(cellData) == "string" && cellData == "";
}
// Returns true if the character char is alphabetical, false otherwise.
function isAlnum(char) {
return char >= 'A' && char <= 'Z' ||
char >= 'a' && char <= 'z' ||
isDigit(char);
}
// Returns true if the character char is a digit, false otherwise.
function isDigit(char) {
return char >= '0' && char <= '9';
}```
答案 0 :(得分：1)
通过对fillInTemplateFromObject(emailTemplate, rowData)使用任何不包含形式为emailTemplate的占位符的字符串运行${"foo"}，可以重现您遇到的错误（每个字符串都需要双引号正则表达式/\$\{\"[^\"]+\"\}/g）。
在SendEmail中，emailTemplate的值来自第一张工作表A1。检查该单元格中的值。它是否包含正确的${"foo"}格式的模板？
由于此错误可能是由用户操作电子表格引起的，因此请在尝试使用期望的数组之前考虑通过检查成功的fillInTemplateFromObject来改善match。
function fillInTemplateFromObject(template, data) {
var email = template;
// Search for all the variables to be replaced, for instance ${"Column name"}
var templateVars = template.match(/\$\{\"[^\"]+\"\}/g);
if (! templateVars) {
throw new Error("No templates found in your template sheet. Aborting.")
}
// Replace variables from the template with the actual values from the data object.
// If no value is available, replace with the empty string.
for (var i = 0; i < templateVars.length; i++) {
// normalizeHeader ignores ${"} so we can call it directly here.
var variableData = data[normalizeHeader(templateVars[i])];
email = email.replace(templateVars[i], variableData || "");
}
return email;
}
您可以在SendEmail中捕获该错误，并提供更多有用的信息：
// inside SendEmail
try {
var emailText = fillInTemplateFromObject(emailTemplate, rowData);
} catch (error) {
throw new Error("In spreadsheet " + ss.getUrl() + " sheet " + templateSheet.getSheetName() + " row " + (i+1) + " there were no templates found.")
}
如果您仍需要调试错误的帮助，请use the apps script debugger或使用various logging options built into apps script在运行时输出数据状态。
答案 1 :(得分：-1)
为什么要使用++ i而不是i ++？我的猜测是这个问题，如果templateVars是一个数组，那么您将到达数组的末尾并尝试在不存在的行上运行一次。也许以前是空行，但现在最后一行是工作表的结尾。
我一无所知，您将更改代码
for (var i = 0; i < templateVars.length; ++i) {
到
for (var i = 1; i < templateVars.length; i++) {