add a custom fields validator using jira expression

[Koceila CHERGUI]

Hello,
I'm working on a projet where I have a screen with custom fields on it, I would like to use a validator using jira expression.

I read the documentation but I didn't understand how to use it on a custom field.

[Oliver Siebenmarck _Polymetis Apps_ · Accepted solution]

Hi @Koceila CHERGUI ,

Welcome to the community! 

You will need two things to use Jira Expressions in a Validator in Jira Cloud. First (like @Fabian Lim correctly mentioned) , you need a workflow app that supports Jira Expressions. In my biased opinion Cloud Workflows is the easiest option, although there are also other options in the marketplace. 

Second, you need to know the ID of your custom field. And that's it. You can now use an expression like this:

issue.customfield_10019 != "foo"

To ensure that your custom field is not set to "foo". 

Of course, Jira Expressions are pretty powerful but can seem a bit daunting at the start. If you just want to play around with them before committing any buying an app, there's a free app called Expression Tester to let you do just that.

Hope that helps,
 Oliver

Full disclosure: I work for the vendor who created Cloud Workflows and the Expression Tester. I'm also quite a big fan of Jira Expressions. Let me know if you need any help getting started.

[Koceila CHERGUI]

I would like to thank you for your reply.
I understand more about it.

Koceila.

[Nikita Rao]

Hey guys, 

I am in a similar situation. My use case is I want to validate on a custom field where if the custom field has an option selected from the dropdown say "x" then I want the user to fill out a different field on the "close issue screen" 

I used the Jira expression JWT to say "issue?.customfield_10152?.value == "x" then on close show an error saying "Please fill out xyz field before closing" . But this somehow doesn't seem to work. Any ideas? 

[Thorsten Letschert _Decadis AG_]

Hi @Nikita Rao ,

in this case, you probably need a conditional operator (see https://apps.decadis.net/pages/viewpage.action?pageId=38569652#expand-Examplesofusingtheconditionaloperator) like

issue?.customfield_10152?.value == "x" ? issue?.customfield_##### != null : true

replacing ###### with the custom field ID of your xyz field.

With this expression, the xyz field must not be empty if your 10152 field equals "x". Otherwißse the condition is true by default.

Please let me know if that solves your request.

Cheers,
Thorsten

[Fabian Lim]

Hi @Koceila CHERGUI,

Take a look at this tutorial on transition screens which describes how you can add validators end to end. Link: https://www.youtube.com/watch?v=RIKYX-z4meM

You may have to purchase a certain plugin such as JSU to have the expression validator: https://beecom-products.atlassian.net/wiki/spaces/JSU/pages/25680565/Regular+Expression+Check+Validator

I hope this helps 

[Koceila CHERGUI]

Thank you