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Features used to implement the example


Example: Set "Total time spent" to "Current date and time - date and time of last update"

I want calculate time, how much issue was in status "In Progress" and add it to "Time Spent". For this I add this post-function:

Field Total time spent (minutes) will be assigned with the calculation result of the formula: {Current date and time} -{Date and time of last update}


Date and Time fields in Jira Workflow Toolbox contain time values in milliseconds. If you simply subtract to Date-Time fields you get the time difference in milliseconds.To convert it to minutes you should divide by {MINUTE} = 1000 * 60
Let's see how to do it in screenshots:


Once configured, transition looks like that: