与 Google Apps 脚本中的 formatDate 的日期比较落后 1 天

Question

编写一个 Google Apps 脚本，通过 Google 任务 API（作为高级服务）查看任务并检查它们的截止日期以查看它们是否过期。如果是，则应该将它们移到当天。

完成项目

我使用此代码创建此项目以保持 Google 任务最新：

Keep Google Tasks Updated

问题

将当前日期与任务截止日期进行比较时，任务截止日期总是晚一天。

研究

调查后我发现它可能与夏令时有关，仅仅休息一小时可能意味着两天后的差异。我发现有类似的问题，他们的解决方案是使用 Session.getScriptTimeZone() 正确设置时区。

然而，即使我使用 Session.getScriptTimeZone() 设置时区，任务的截止日期仍然晚了一天。

代码

function checkOverdue(t) {
  var today = Utilities.formatDate(new Date(), "EST", "MM/dd/yyyy");
  //var today = new Date();
  var tasks = t;
  if (tasks.items) {
    for (var i = 0; i < tasks.items.length; i++) {
      var task = tasks.items[i];
      if (task.due) {
        var taskDue = Utilities.formatDate(new Date(task.due), "EST", "MM/dd/yyyy");
        Logger.log('"%s", Comparing "%s" to "%s"',
                 task.title, taskDue, today);
        if (taskDue.valueOf() < today.valueOf()) {
          Logger.log('Task with title "%s" is past due', task.title);
        }
      }
    }
  } else {
    Logger.log('No tasks found.');
  }
}

日志

[18-04-10 13:12:33:927 EDT] "Create Bio presentation", Comparing "04/09/2018" to "04/10/2018"
[18-04-10 13:12:33:928 EDT] Task with title "Create Bio presentation" is past due
[18-04-10 13:12:33:929 EDT] "Bio Presentation", Comparing "04/10/2018" to "04/10/2018"
[18-04-10 13:12:33:930 EDT] "Matrix HW", Comparing "04/09/2018" to "04/10/2018"
[18-04-10 13:12:33:930 EDT] Task with title "Matrix HW" is past due

=== [更新] ===

我注意到如果我记录原始 task.due 它似乎有正确的日期。所以关于格式的一些事情正在改变日期。

新代码

function checkOverdue(t) {
  var today = Utilities.formatDate(new Date(), "EST", "MM/dd/yyyy");
  //var today = new Date();
  var tasks = t;
  if (tasks.items) {
    for (var i = 0; i < tasks.items.length; i++) {
      var task = tasks.items[i];
      if (task.due) {
        var taskDue = Utilities.formatDate(new Date(task.due), "EST", "MM/dd/yyyy");
        Logger.log('"%s", Comparing TaskDue: "%s" to today: "%s", task.due "%s"', task.title, taskDue, today, task.due);
        if (taskDue.valueOf() < today.valueOf()) {
          Logger.log('Task with title "%s" is past due', task.title);
        }
      }
    }
  } else {
    Logger.log('No tasks found.');
  }
}

新日志

[18-04-10 14:15:17:628 EDT] "Create Bio presentation", Comparing TaskDue: "04/09/2018" to today: "04/10/2018", task.due "2018-04-10T00:00:00.000Z"
[18-04-10 14:15:17:629 EDT] Task with title "Create Bio presentation" is past due
[18-04-10 14:15:17:630 EDT] "Bio Presentation", Comparing TaskDue: "04/10/2018" to today: "04/10/2018", task.due "2018-04-11T00:00:00.000Z"
[18-04-10 14:15:17:631 EDT] "Matrix HW", Comparing TaskDue: "04/09/2018" to today: "04/10/2018", task.due "2018-04-10T00:00:00.000Z"
[18-04-10 14:15:17:631 EDT] Task with title "Matrix HW" is past due

=== [更新 2] ===

将 formatDate 中的两个 "EST" 更改为 Session.getScriptTimeZone()

删除了 .valueOf() 以进行比较。

仍然导致相同的问题

新代码

function checkOverdue(t) {
  var today = Utilities.formatDate(new Date(), Session.getScriptTimeZone(), "MM/dd/yyyy");
  //var today = new Date();
  var tasks = t;
  if (tasks.items) {
    for (var i = 0; i < tasks.items.length; i++) {
      var task = tasks.items[i];
      if (task.due) {
        var taskDue = Utilities.formatDate(new Date(task.due), Session.getScriptTimeZone(), "MM/dd/yyyy");
        Logger.log('"%s", Comparing TaskDue: "%s" to today: "%s", task.due "%s"', task.title, taskDue, today, task.due);
        if (taskDue < today) {
          Logger.log('Task with title "%s" is past due', task.title);
        }
      }
    }
  } else {
    Logger.log('No tasks found.');
  }
}

新日志

[18-04-10 15:21:01:988 EDT] "Create Bio presentation", Comparing TaskDue: "04/09/2018" to today: "04/10/2018", task.due "2018-04-10T00:00:00.000Z"
[18-04-10 15:21:01:988 EDT] Task with title "Create Bio presentation" is past due
[18-04-10 15:21:01:990 EDT] "Bio Presentation", Comparing TaskDue: "04/10/2018" to today: "04/10/2018", task.due "2018-04-11T00:00:00.000Z"
[18-04-10 15:21:01:991 EDT] "Matrix HW", Comparing TaskDue: "04/09/2018" to today: "04/10/2018", task.due "2018-04-10T00:00:00.000Z"
[18-04-10 15:21:01:991 EDT] Task with title "Matrix HW" is past due

Answer 1

根据 Google 任务 API 文档，task#due property is an RFC 3339 日期时间值，例如"2018-04-11T0:45:26.000Z"。从这个字符串中，您可以原生地构造一个 Javascript Date，即

var taskDueDate = new Date(task.due);

请注意，这相当于调用 Date.parse() and thus could be the reason your date comparisons fail, given that Google Apps Script is Javascript 1.6 (i.e. not ES5+). A possibly better method would be to use a custom parser, given that you know the strict specific format that you will get from task.due. One such parser is detailed in this answer。

如 @Serge 所述，您应该使用本机 Date 对象执行此比较，而不是 Strings:

function isOverdue(task) {
  if(!task.due)
    return false;

  var now = new Date();
  var endOfToday = new Date(Date.UTC(now.getUTCFullYear(), now.getUTCMonth(), now.getUTCDate() + 1)); // Also known as start of tomorrow ;)
  var taskDueDate = myFunctionToConvertRFC3339StringToJSDate(task.due);
  return taskDueDate < endOfToday;
}

Answer 2

有关信息，这是我用来将 RFC339 时间转换为日期对象的小代码。我发现它更容易阅读和理解。

function parseDate_RFC3339(string) {
  var refStr = new Date().toString();
  Logger.log('refStr = '+refStr);
  var tzOffset = Number(refStr.substr(refStr.indexOf('GMT')+4,2));
  Logger.log('TZ offset = '+tzOffset);
  var parts = string.split('T');
  parts[0] = parts[0].replace(/-/g, '/');
  var t = parts[1].split(':');
  return new Date(new Date(parts[0]).setHours(+t[0]+tzOffset,+t[1],0));
}

与 Google Apps 脚本中的 formatDate 的日期比较落后 1 天

Date comparisons with formatDate in Google Apps Script are 1 day behind

date

date-comparison

google-apps-script

google-tasks

google-tasks-api

完成项目

问题

研究

代码

日志

=== [更新] ===

新代码

新日志

=== [更新 2] ===

新代码

新日志