No signature of method Error

[Kristen C. Blake]

When building a script through the script console, I am receiving this error: 

Error!

No signature of method: com.atlassian.jira.issue.DocumentIssueImpl.setCustomFieldValue() is applicable for argument types: (com.atlassian.jira.issue.fields.CustomFieldImpl, java.lang.String) values: [CustomerRank, Silver] Possible solutions: getCustomFieldValue(com.atlassian.jira.issue.fields.CustomField)

My script is as follows: 

import com.atlassian.jira.bc.issue.search.SearchService
import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.jql.parser.JqlQueryParser
import com.atlassian.jira.web.bean.PagerFilter
import org.apache.log4j.Logger
import com.atlassian.jira.issue.MutableIssue

def log = Logger.getLogger("com.onresolve.jira.groovy.MyScript")

def jqlQueryParser = ComponentAccessor.getComponent(JqlQueryParser.class)

def query = jqlQueryParser.parseQuery(""""Customer Account" in accountsByCategory(silver) and createdDate > startOfMonth()""") // query as you would enter in to issue nav

def searchService = ComponentAccessor.getComponent(SearchService.class)
def user = ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser()
def results = searchService.search(user, query, PagerFilter.getUnlimitedFilter())
def issueManager = ComponentAccessor.getIssueManager()
def commentManager = ComponentAccessor.getCommentManager()
def customFieldManager = ComponentAccessor.getCustomFieldManager()

results.getIssues().each {issue ->
def cf = customFieldManager.getCustomFieldObjects(issue).find {it.name == 'CustomerRank'}
issue.setCustomFieldValue(cf, 'Silver')
}

Can you please help me identify what I am doing wrong?

Thank you,

KCP

[Jamie Echlin [Adaptavist]]

When you search the result that you get is a DocumentIssue... which corresponds to a Lucene document representing the issues fields. To update a CF value you get to get hold of a mutable issue. 

This example shows how: https://jamieechlin.atlassian.net/wiki/display/GRV/Miscellaneous+Groovy+Scripts#MiscellaneousGroovyScripts-ExecutingaQuery