Uncaught DayPilot.Duration(): Invalid start argument, DayPilot.Date expected

Asked by CARLOS MIGUEL LOPEZ DURAÑONA
19 days ago.

I’m getting the error Uncaught DayPilot.Duration(): Invalid start argument, DayPilot.Date expected and my events are not being loaded from the database. I have this:

scheduler.events.load("/api/Tasks");

In my controller class:

// GET: api/Tasks
[HttpGet]
public async Task<ActionResult<IEnumerable<Task>>> GetTasks()
{
  return await _context.Tasks.ToListAsync();
}

And in my model:

public class Task
{
  [Key]
  [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
  public int Id { get; set; }
  public DateTime Start { get; set; }
  public DateTime End { get; set; }
  [JsonPropertyName("resource")]
  public int ResourceId { get; set; }
  [JsonIgnore, IgnoreDataMember]
  public Machine Machine { get; set; }
  public string Text { get; set; }
  public string Color { get; set; }
  public int JobId { get; set; }
  public int? NextId { get; set; }
}

When I print with console.log() I can see the data:

{id: 1, start: '2024-10-01T09:00:00', end: '2024-10-01T10:00:00', resource: 1, text: 'Carlos',…}

Thanks for any help.

bug mvc

Comment posted by Dan Letecky [DayPilot]
19 days ago.

Could you please post the full stack trace of the JavaScript error?

Comment posted by CARLOS MIGUEL LOPEZ DURAÑONA
19 days ago.

Uncaught DayPilot.Duration(): Invalid start argument, DayPilot.Date expected That is all that I can see in the browser console.

sin-titulo.png

Comment posted by CARLOS MIGUEL LOPEZ DURAÑONA
18 days ago.

The error occur in this section of your code:

if (2 === arguments.length) {
    console.log(arguments);
    var o = arguments[0],
        s = arguments[1];

    if (!(o instanceof DayPilot.Date) && typeof o !== "string") {
        throw "DayPilot.Duration(): Invalid start argument, DayPilot.Date expected";
    }

    if (!(s instanceof DayPilot.Date) && typeof s !== "string") {
        throw "DayPilot.Duration(): Invalid end argument, DayPilot.Date expected";
    }

    if (typeof o === "string") {
        o = new DayPilot.Date(o);
    }

    if (typeof s === "string") {
        s = new DayPilot.Date(s);
    }

    e = s.getTime() - o.getTime();
}

I put the console.log to see the arguments:

0: DayPilot.Date {value: '2024-11-01T09:00:00'}

1: DayPilot.Date {value: '2024-11-01T10:00:00'}

If I comment that section the component works as expected.

Answer posted by Dan Letecky [DayPilot]
13 days ago.

Yes, this is where the exception comes from, but the stack trace points to the code that uses it. That would help identify the problem.

According to your log, both objects are DayPilot.Date but they can be from a different context - e.g. if you import two different versions of the library. That’s why the instanceof check might fail.

Uncaught DayPilot.Duration(): Invalid start argument, DayPilot.Date expected

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