how can I use automation to affect two linked issues

[Yingyi]

I link issue A and issue B, B is blocked A

I wonder if any automation can help, when I issue A's start date delayed, Issue B can delay automatically 

[Ste Wright]

Hi @Yingyi 

This should be possible - can I confirm the logic is...

• Issue A blocks Issue B (i.e Issue B is blocked by Issue A)
• If Issue A's start date is modified
• Update Issue B's start date with the same amount of days

...is this correct?

Ste

[Yingyi]

yes！ You got it correctly! Do we have an easy way to achieve that? 

[Ste Wright]

Hi @Yingyi 

This should work:

• Trigger: Field Value Changed
  • Field to Monitor = Start date
• (1) Action: Create Variable
  • Name = previousDate
  • Smart Value = {{changelog.Start date.fromString}}
• (2) Action: Create Variable
  • Name = currentDate
  • Smart Value = {{changelog.Start date.toString}}
• (3) Action: Create Variable
  • Name = daysDiff
  • Value = {{previousDate.toDate.diff(currentDate.toDate).days}}
• Branch: Related Issues
  • Type = Linked Issues
  • Link Types = blocks
    • Branch-Action: Edit Issue
      • Field = Start date
        • Value = {{#issue.Start date}}func=plusDays({{daysDiff}}) {{/}}

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A few notes on this rule:

• Variables (1) and (2) represent the previous Start date and current one
• Variable (3) then calculates how much the date changed by in days
• You can add additional Conditions as required - for example, can Issue B's Start date be empty? If yes, what should happen in that scenario?

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Let us know if this works for you!

Ste