Need help with clearing issue Resolution through ScriptRunner

[Aisha M]

In our environment, users are NOTallowed to move an issue from DONE to the previous statuses. But, when they accidently do it, I want to run a script to move the issue back to the previous status say 'In Progress".

I am able to move the status back successfully, but the Resolution of the issue still shows as "Done" . . How do I change it to None or "Unresolved" 

Below is a snippet of my code for clearing the Resolution:

def issueService = ComponentAccessor.getIssueService()

def currentUser = ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser()

def issueInputParameters = issueService.newIssueInputParameters()

issueInputParameters.addCustomFieldValue(IssueFieldConstants.RESOLUTION, null)

def validationResult = issueService.validateUpdate(currentUser, issue.id, issueInputParameters)

if (validationResult.isValid()) {

    issueService.update(currentUser, validationResult)

} else {

    return "Failed to clear resolution: ${validationResult.errorCollection}"

}

[Mohamed Benziane · Accepted solution]

Hi,

try to get the issue as a mutableIssue, that will allow you to set the resolution
MutableIssue (Atlassian JIRA 7.6.1 API)

[Aisha M]

Thank you ! It took me a long to figure what you just said :) 

[Aisha M · Accepted solution]

Was able to figure out !

I kept using issueService and tried to rest the resolution via the IssueInputParameters and it did not work.

So instead cleared the resolution directly from the MutableIssue object