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Item field constraint based on children field values

tschruben
1-Newbie

Item field constraint based on children field values

I would like to create a constraint on an item based on the linked child items.

I have an item called "Project" that will have child items of "Task". Both of these items types have a state field and the same values like, "In Progress", "Ready For Review", "Complete", etc.

What I want to do is keep the user from changing the "Project"/parent item state to the next state if all the "Task"/child items are not in the right or same state. Once all the tasks are set to the right state I would like to allow the project item state to advanced. So, is this possible, and if so could someone point me to the right docs?

Visual example:

(T1)

     Project State:In Progress

          Children:

               Task 1 State:In Progress

               Task 2 State:In Progress

(T2) - Note that at this time the user would not be able to change the project state to the next state because all the tasks are not completed.

     Project State:In Progress

          Children:

               Task 1 State:Ready For Review

               Task 2 State:In Progress

(T3)

     Project State:In Progress

          Children:

               Task 1 State:Completed

               Task 2 State:Ready For Review

(T4) - Now the user can move the Project item state to Completed because all the children are in the correct state.

     Project State:In Progress

          Children:

               Task 1 State:Completed

               Task 2 State:Completed

(T5)

     Project State:Completed

          Children:

               Task 1 State:Completed

               Task 2 State:Completed

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