How delete \ add current user from\into MultiUserPicker in groovy or java or ScriptRunner?

[Дмитрий Тягунов]

I have one issue and two custom fields type MultiUserPicker: MUP1, MUP2.
initially
MUP1 = (user1, user2, user3)
MUP2 = null

in the post-function I need to do

MUP1 = MUP1 - CurrentUser
MUP2 = MUP2 + CurrentUser

if current user exist in first field.

as a result

MUP1 = null
MUP2 = (user1, user2, user3)

I broke my brain, but did not find methods.
May be Class MultiUserCFType and updateValue(customField, issue, value)? But how?

Does anyone know how to do?

Also, Happy New Year! :)

[Vasiliy Zverev]

Here is code exmple to start with:

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.MutableIssue
import com.atlassian.jira.issue.fields.CustomField
import com.atlassian.jira.user.ApplicationUser

ApplicationUser user = ComponentAccessor.getJiraAuthenticationContext().getUser()

CustomField customField1 = ComponentAccessor.getCustomFieldManager().getCustomFieldObjectByName("FieldName1")
CustomField customField2 = ComponentAccessor.getCustomFieldManager().getCustomFieldObjectByName("FieldName2")

//Delete user
List<ApplicationUser> users = new ArrayList<>();

for(ApplicationUser multiUseruser: (List<ApplicationUser>) issue.getCustomFieldValue(customField1)){
        if(!multiUseruser.getKey().equals(user.getKey())){
                users.add(multiUseruser)
        }                
}

issue.setCustomFieldValue(customField1, users);

//add user
issue.setCustomFieldValue(customField2, ((List<ApplicationUser>) issue.getCustomFieldValue(customField1)).add(user))

[Дмитрий Тягунов]

Hello, Vasiliy.

Your code gives the conversion error types.
Can you help solve this? 

Attlassian sends to the article: https://confluence.atlassian.com/jira/upgrading-workflow-plugins-for-jira-3-2-116700.html
but that's about 3 versions of the Jira, but we have 6.

java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.util.Collection
	at com.atlassian.jira.issue.customfields.impl.AbstractMultiCFType.createValue(AbstractMultiCFType.java:41)
	at com.atlassian.jira.issue.fields.CustomFieldImpl.createValue(CustomFieldImpl.java:854)
	at com.atlassian.jira.issue.fields.CustomFieldImpl.updateValue(CustomFieldImpl.java:522)
	at com.atlassian.jira.issue.fields.CustomFieldImpl.updateValue(CustomFieldImpl.java:504)
	at com.atlassian.jira.workflow.function.issue.GenerateChangeHistoryFunction.execute(GenerateChangeHistoryFunction.java:65)
	at com.opensymphony.workflow.AbstractWorkflow.executeFunction(AbstractWorkflow.java:1050)
	at com.opensymphony.workflow.AbstractWorkflow.transitionWorkflow(AbstractWorkflow.java:1446)
	at com.opensymphony.workflow.AbstractWorkflow.doAction(AbstractWorkflow.java:564)
...

[Vasiliy Zverev]

Could you provide where this error raise? Which line?

[Дмитрий Тягунов]

error line

issue.setCustomFieldValue(customField2, ((List<ApplicationUser>) issue.getCustomFieldValue(customField1)).add(user))

in particular

issue.getCustomFieldValue(customField1)).add(user))

[Vasiliy Zverev]

Hm, lets try this:

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.MutableIssue
import com.atlassian.jira.issue.fields.CustomField
import com.atlassian.jira.user.ApplicationUser

ApplicationUser user = ComponentAccessor.getJiraAuthenticationContext().getUser()

CustomField customField1 = ComponentAccessor.getCustomFieldManager().getCustomFieldObjectByName("FieldName1")
CustomField customField2 = ComponentAccessor.getCustomFieldManager().getCustomFieldObjectByName("FieldName2")

//Delete user
List<ApplicationUser> users = new ArrayList<>();

for(ApplicationUser multiUseruser: (List<ApplicationUser>) issue.getCustomFieldValue(customField1)){
    if(!multiUseruser.getKey().equals(user.getKey())){
        users.add(multiUseruser)
    }
}

issue.setCustomFieldValue(customField1, users);

//add user
issue.setCustomFieldValue(customField2, ((List<ApplicationUser>) issue.getCustomFieldValue(customField1)).add(users))

[valeria cruz]

<p>I'm training to use this script, but its not deleting my currentUser .

workflow show me this message</p>

2017-06-07 12:43:39,622 ERROR [workflow.ScriptWorkflowFunction]: *************************************************************************************
2017-06-07 12:43:39,625 ERROR [workflow.ScriptWorkflowFunction]: Script function failed on issue: BRCH-53, actionId: 821, file: <inline script>
java.lang.NullPointerException
	at com.atlassian.jira.issue.IssueImpl.getCustomFieldValue(IssueImpl.java:896)
	at com.atlassian.jira.issue.Issue$getCustomFieldValue$2.call(Unknown Source)
	at Script281.run(Script281.groovy:18)

[valeria cruz]

i'm training to use this script, but its not delete my current user . i receive this message

2017-06-07 12:43:39,622 ERROR [workflow.ScriptWorkflowFunction]: *************************************************************************************
2017-06-07 12:43:39,625 ERROR [workflow.ScriptWorkflowFunction]: Script function failed on issue: BRCH-53, actionId: 821, file: <inline script>
java.lang.NullPointerException
	at com.atlassian.jira.issue.IssueImpl.getCustomFieldValue(IssueImpl.java:896)
	at com.atlassian.jira.issue.Issue$getCustomFieldValue$2.call(Unknown Source)
	at Script281.run(Script281.groovy:18)

[Nic Brough -Adaptavist-]

When you get the current content of the field, it will return a list type object, with each element of the list being a user.  You should be able to add or remove users on the list, and then post the modified list back into the custom field value.