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Conditional execution

Owned by David Fischer
Last updated: Jul 07, 2020 by Radhika Vijji. (Unlicensed)
4 min read

Post functions are provided with an option to control their execution. You need to input a Nunjucks template in the Condition field, and based on the result of that expression, the post-function will either be executed or skipped.

To add a condition to control the execution of the post-function : 

  1. Select the check box Run this post-function only if a condition is verified.

  2. Type a Nunjucks template that returns either true or false.

Expected value in the Nunjucks template

The value should be either a boolean value (true or false) or more generally any text that will be interpreted as either "truthy" or "falsy".

Text: Any text will be interpreted as "truthy" (the equivalent of true) except false, an empty string, a string consisting only of whitespaces. For example, the following text will be considered as "truthy":

  • true

  • 1

  • A string

  • [Object object]

  • []

Boolean logic operators: You can use traditional boolean logic operators, such as or, and and not, to combine conditions. You can also use parentheses to group expressions. For example:

  • {{ 1 == 1 or 1==2 }}

  • {{ issue.key == 'TEST-1' and issue.fields.subject == 'Do it' }}

  • {{ true and (false or true) }}

  • {{ not 1==1 }}

  • {{ issue.fields.description is null }} returns true if the issue has no description

  • {{ issue.fields.assignee is not null }} returns true if the issue has an Assignee

Examples of Nunjucks expressions returning a "truthy" value:

  • {{issue.fields.assignee}} if the issue is assigned

  • {{issue.fields.assignee.accountId == "accountId:557058:8952dfd1-85c4-493f-87d8-d383b987e05c"}} if the issue is assigned to the user whose accountId is "557058:8952dfd1-85c4-493f-87d8-d383b987e05c"

  • {{issue.fields.description is not null}} if the issue's description is not empty

  • {{issue.fields.assignee and issue.fields.status.name == "In Progress"}} if the issue is assigned and in the “In Progress” status

Sample use cases for Conditional execution

 A tester creates an issue. The created issue should be automatically assigned to the Product Owner, only if the issue is a BUG.

  • Create a Product Owner project role, with the product owner as the only member.

  • Add the Assign to role member post-function to the Create transition of the issue workflow.

  • Select Product Owner as the project role.

  • Select the check box Run this post-function only if a condition is verified.

  • Type the following code in Condition.

    {{ issue.fields.issuetype.name == "Bug" }}

 Automatically escalate an issue if it is being raised with a "Blocker" priority.

  • Add the Transition issue post-function to the Create transition of the issue's workflow.

  • Input the transition name or ID of the transition that escalates the issue.

  • Select the check box Run this post-function only if a condition is verified.

  • Write the following content in the Condition section.

    {{ issue.fields.priority == "Blocker" }}

     

  • Place this post-function at the end in the list of post-functions.

 Automatically transition the Epic when all Stories are resolved.

  • Add the Transition current issue post-function to the Resolve transition of the Story workflow.

  • Input the transition name or ID of the Resolve transition.

  • Select the check box Run this post-function only if a condition is verified.

  • Write the following content in the Condition section.

    {% set stories = issue | epic | stories %} {% set trigger = true %} {% for story in stories %} {% if story.fields.status.name != "Resolved" %} {% set trigger = false %} {% endif %} {% endfor %} {{ trigger }}

     

  • Place this post-function at the end in the list of post-functions.

 Copy value from a Single Version Picker select list to the Fix Version(s) field if the resolution provided while closing the issue is "Fixed".

  • Add the Copy value from field to field post-function to the Close transition of the issue's workflow.

  • Select the Single version picker in the From field.

  • Select the Fix Version/s in the To field.

  • Select the check box Run this post-function only if a condition is verified.

  • Write the following content in the Condition section.

 Assign a Bug to a Product Manager only when its priority is Critical

  • Add the Assign to role member post-function to the transition of the issue's workflow.

  • Select Product Managers as the Project Role.

  • Select Conditional execution and write the following condition:

 Transition an issue to In Progress status when the issue is either of High priority or the reporter of the issue belongs to Service Desk Customers Project role

Link issues that belong to the project with key “BACKEND” and created before 5 days