Scenario

For the list of supported fields, refer to Supported Field Types

The Component field is not supported in the Source Field and Destination Field. We can solve this problem by using both the ScriptRunner and Lookup Manager together.

How-to

Step 1: Create a Lookup Table

Check out how to create a lookup table

Component	Custom_Select	Category

Component	Custom_Select	Category
Internal	LOOKUP	INTERNAL
Business	CQL	BUSINESS
Client	OOO	CLIENT

Step 2: Create Custom Script Post-Function(ScriptRunner)

Step 3: Copy and paste the code below into the console

Case 1: Component Field as Source Field

To populate a custom field based on looking up Component in a table managed by Lookup Manager

The Lookup Manager gets the Component Table to search the Component column for the value Internal. If there is a matching row, return the value in the Custom_Select column.
Then set the value to custom field Custom_Select on the created issue.

import com.onresolve.scriptrunner.runner.customisers.PluginModule
import com.onresolve.scriptrunner.runner.customisers.WithPlugin
import com.akelesconsulting.jira.plugins.rest.LookupService
import com.atlassian.jira.issue.MutableIssue;
import com.atlassian.jira.project.Project
import com.atlassian.jira.event.type.EventDispatchOption
import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.IssueManager
import org.apache.log4j.Logger
import org.apache.log4j.Level
import groovy.json.JsonSlurper

@WithPlugin("com.akelesconsulting.jira.plugins.LookupManager")

@PluginModule
LookupService lookupService

def log = Logger.getLogger("LookupManager")
log.setLevel(Level.DEBUG)

def issueManager = ComponentAccessor.getIssueManager()
def customFieldManager = ComponentAccessor.getCustomFieldManager()
def user = ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser()

log.debug("***** Populate a custom field based on looking up Component in a table managed by Lookup Manager *****")

def components = issue.getComponentObjects();
log.debug ( issue.getComponentObjects()*.name ) //print out the name of each of the components

if (components) {
    
    def tableName = "Component Table"
    def sourceCol = "Component"
    def sourceVal = components[0].name  //E.g. "Internal"
    def destCol = "Field_1"

    int tableId = lookupService.getTableIdByName(tableName) //tableId = 1
    def matchingValuesArray = lookupService.lookup(tableId, sourceCol, sourceVal, destCol) // matchingValuesArray = [LOOKUP]
    def value = matchingValuesArray[0]
    log.debug("Matching Vallue: " + value)

    def customFieldName = "Custom_Select" //Custom Select Field
    def cfSelect = customFieldManager.getCustomFieldObjectByName(customFieldName)
    assert cfSelect: "Could not find custom field with name $customFieldName"

    def availableOptions = ComponentAccessor.optionsManager.getOptions(cfSelect.getRelevantConfig(issue))
    def optionToSet = availableOptions.find {it.value == value}
    assert optionToSet: "Could not find option with value $newValue. Available options are ${availableOptions*.value.join(",")}"

    issue.setCustomFieldValue(cfSelect, optionToSet)
    
    issueManager.updateIssue(user, issue, EventDispatchOption.DO_NOT_DISPATCH, false)
}

Case 2: Component Field as Destination Field

To set the Component value based on looking up a custom field in a table managed by Lookup Manager

The Lookup Manager gets the Component Table to search the Category column for the value INTERNAL. If there is a matching row, return the value in the Component column.
Then set the value to Component field on the created issue.

import com.onresolve.scriptrunner.runner.customisers.PluginModule
import com.onresolve.scriptrunner.runner.customisers.WithPlugin
import com.akelesconsulting.jira.plugins.rest.LookupService
import com.atlassian.jira.issue.IssueManager
import com.atlassian.jira.issue.MutableIssue;
import com.atlassian.jira.project.Project
import com.atlassian.jira.event.type.EventDispatchOption
import com.atlassian.jira.component.ComponentAccessor
import org.apache.log4j.Logger
import org.apache.log4j.Level
import groovy.json.JsonSlurper

import com.atlassian.crowd.embedded.api.User
import com.atlassian.jira.bc.project.component.ProjectComponent
import com.atlassian.jira.event.type.EventDispatchOption
import com.atlassian.jira.util.collect.MapBuilder;
import java.util.List;
import org.ofbiz.core.entity.GenericValue;
import org.ofbiz.core.entity.GenericEntityException;

@WithPlugin("com.akelesconsulting.jira.plugins.LookupManager")

@PluginModule
LookupService lookupService

def log = Logger.getLogger("LookupManager")
log.setLevel(Level.DEBUG)

def issueManager = ComponentAccessor.getIssueManager()
def customFieldManager = ComponentAccessor.getCustomFieldManager()
def user = ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser()

log.debug("***** Set the Component value based on looking up another custom field in a table managed by Lookup Manager *****")

def customFieldName = "Category" //Custom Select Field
def cfSelect = customFieldManager.getCustomFieldObjectByName(customFieldName)
assert cfSelect: "Could not find custom field with name $customFieldName"

if (issue.getCustomFieldValue(cfSelect)) {
    
    def tableName = "Component Table"
    def sourceCol = "Category"
    def sourceVal = issue.getCustomFieldValue(cfSelect).getValue() // INTERNAL
    def destCol = "Component"

    def tableId = lookupService.getTableIdByName(tableName) //tableId = 1
    def matchingValuesArray = lookupService.lookup(tableId, sourceCol, sourceVal, destCol) // matchingValuesArray = [Internal]
    def value = matchingValuesArray[0]
    log.debug("Matching Vallue: " + value)

    def project = issue.getProjectObject()
    def projectComponentManager = ComponentAccessor.getProjectComponentManager()
    def component = projectComponentManager.findByComponentName(project.getId(), value)
    assert component: "Could not find component name $value"

    issue.setComponent([component])
    
    //Update Assignee field
    def componentType = component.getAssigneeType()

    def assignee = null
    switch (componentType) { //0 = Project Default, 3 = Component Lead,  2 = Project Lead, 3 = Unassigned,
        case 0:
            def projectDefault = issue.getProjectObject().getAssigneeType()  //2 = Project Lead, 3 = Unassigned
            if (projectDefault == 2) {
                assignee = issue.getProjectObject().getProjectLead()
            }
            break
        case 1:
            assignee = component.getComponentLead()
            break
        case 2:
            assignee = issue.getProjectObject().getProjectLead()
            break
        case 3:
            assignee = null
    }
    log.debug("Assignee: " + assignee)
    issue.setAssignee(assignee)
    
    issueManager.updateIssue(user, issue, EventDispatchOption.DO_NOT_DISPATCH, false)
}

Step 3: Put the post function after the “Create the issue originally”

The custom script runner post-function should be placed after the Create the issue originally transition.