How to prevent auto calculation of start date, end date and duration

Gantt
#1

Hi,

I am passing the start date, end date, and duration. I just wanted to prevent the auto calculation of Gantt.

#2

Hello Abid,
When you load the task data into Gantt, it needs to modify it to the format it works with. If there are only 2 date parameters, for example, only the start_date and duration, Gantt needs to calculate the end_date. If there are all three date parameters, the duration parameter will be ignored and calculated from the start_date and end_date parameters.
There is no way to change how it works.
However, you can change what is displayed for the users. You can set the gantt.config.duration_unit to minute and add the formatters that will convert the minute units to days or months:
https://docs.dhtmlx.com/gantt/desktop__formatters_ext.html
https://docs.dhtmlx.com/gantt/desktop__working_time.html#taskdurationindecimalformat
Here is an example of how it works:
https://docs.dhtmlx.com/gantt/samples/09_worktime/09_decimal_durations.html

#3

Hi, Ramil!
Is it possible to disable the calculation today?

#4

Hello Nick,
Gantt expects that each task you load should have the date parameters.
If a task is unscheduled, Gantt still adds the dates, but starting from the 8.0.7 version, unscheduled tasks are ignored when Gantt auto-schedules tasks and calculates the critical path or slacks:
https://docs.dhtmlx.com/gantt/whatsnew.html#:~:text=Fix%20the%20inability%20to%20unschedule%20tasks%20from%20the%20lightbox%20when%20Auto%20Scheduling%20is%20enabled

https://docs.dhtmlx.com/gantt/whatsnew.html#:~:text=Prevent%20Auto%20Scheduling%20of%20linked%20unscheduled%20tasks

https://docs.dhtmlx.com/gantt/whatsnew.html#:~:text=Fix%20errors%20that,unscheduled%20child%20tasks