Ambiguous method overloading for method ApplicationUsers#from

Recently we upgraded to JIRA 6.3.15 and ScriptRunner v3 and one of the our Scripted Fields does not work anymor.  The log file records the following error:

groovy.lang.GroovyRuntimeException: Ambiguous method overloading for method com.atlassian.jira.user.ApplicationUsers#from.
Cannot resolve which method to invoke for [null] due to overlapping prototypes between:
[interface com.atlassian.crowd.embedded.api.User]
[interface java.util.Collection]

It was working just fine previously in JIRA 5.  I'm aware of a change in ApplicationUser interface in JIRA 6 but just wondering if the problem lies with my script or the fact that the use of this interface has been changed since the upgrade?

My script is just a simple script that collects user from customfields:

Collection<ApplicationUser> appUserCollection = []

appUserCollection.add(ApplicationUsers.from(issue.getCustomFieldValue(CustomFieldObject)))

2 answers

1 accepted

Hi Jamie, Thanks for the pointer. We handled the null value by adding '?' operator when getting the custom field value. However what we found is that your suggestion still returns the same error. We tried different permutations such as below (enforce it in one level before):

appUserCollection.add(ApplicationUsers.from(issue.getCustomFieldValue(CustomFieldObject)) as ApplicationUser)

But still received the same error. If I enforce it at the lowest level like this:

appUserCollection.add(ApplicationUsers.from(issue.getCustomFieldValue(CustomFieldObject) as ApplicationUser))

We will get

'No signature of method: static com.atlassian.jira.user.ApplicationUsers.from() is applicable for argument types: (null) values: [null]'.

What we found to be working is to enforce it as User when the ApplicationUsers is calling the 'from' method:

appUserCollection.add(ApplicationUsers.from(issue.getCustomFieldValue(CustomFieldObject) as User))

as this will feed User type to ApplicationUsers and return a single User. Hope this can help others.

You're right, in my example I had the "as ApplicationUser" in the wrong place, it should have been inside the parens. Better though just to check it for null then do something else.

1 vote

It's going to fail when issue.getCustomFieldValue(CustomFieldObject) is null, as there are two methods for  com.atlassian.jira.user.ApplicationUsers#from. In groovy, method selection happens at runtime.

So you can handle the null value yourself, or force one or other method to be selected by using 

appUserCollection.add(ApplicationUsers.from(issue.getCustomFieldValue(CustomFieldObject))) as ApplicationUser

(or the other choice).

Suggest an answer

Log in or Join to answer
Community showcase
Sarah Schuster
Posted Jan 29, 2018 in Jira

What are common themes you've seen across successful & failed Jira Software implementations?

Hey everyone! My name is Sarah Schuster, and I'm a Customer Success Manager in Atlassian specializing in Jira Software Cloud. Over the next few weeks I will be posting discussion topics (8 total) to ...

3,304 views 14 20
Join discussion

Atlassian User Groups

Connect with like-minded Atlassian users at free events near you!

Find a group

Connect with like-minded Atlassian users at free events near you!

Find my local user group

Unfortunately there are no AUG chapters near you at the moment.

Start an AUG

You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs

Groups near you
Atlassian Team Tour

Join us on the Team Tour

We're bringing product updates and pro tips on teamwork to ten cities around the world.

Save your spot