How can I write a script in Scriptrunner to check if there is a user assigned to a ticket and if not

[Eric Blumberg]

// Check if ticket is assigned to a user

// -- If not, check that the user has the assignable user permission

// ----- If they do, assign it to the current user

if (issue.fields.assignee != null) {

//Set assignee here,

[Nir Haimov · Accepted solution]

def issueKey = 'AAA-111111'

def result = get('/rest/api/2/issue/' + issueKey + '?fields=assignee')
   .header('Content-Type', 'application/json')
   .asObject(Map)
if (result.status == 200){
   if (result.body.fields['assignee'] == null) {
      def put = put('/rest/api/2/issue/' + issueKey)
         .header('Content-Type', 'application/json')
         .body([
            fields:[
               assignee: [
                   id: 'admin'
               ]
            ]
         ])
     .asString()
   if (put.status == 204) {
     return 'Success'
   } else {
     return "${put.status}: ${put.body}"
   }
  }
} else {
 return "Failed to find issue: Status: ${result.status} ${result.body}"
}

[Eric Blumberg]

@Nir can I get a brief explanation of the code?

[Nir Haimov]

Sure,

def result = get('/rest/api/2/issue/' + issueKey + '?fields=assignee')

this get only the "assignee" field data (no need to get all data if all you want is the assignee)

inside you got "if" statement, status 200 says "success"

so if success to get the assignee data of the issue, check if it null

if (result.body.fields['assignee'] == null)

if it is null, put (update) the assignee that you want (in my example i set 'admin'), you change the assignee to who ever you want. 

[Eric Blumberg]

@Nir Haimov if I want the user who executed the transition to be set as the assignee is that the current user? How would I do so?

[Eric Blumberg]

Thank you for all your help