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Russell baker 1Russell baker 1 

Trigger to Pull related contact designation on Task page when tesk create or edit

I have a requirement. Contact related to Task, I need to pull his functional role ( custom field) on Activity page layout. So whenever I create or edit an activity and relate with ant contact so his/her functional role should populate automatic.

Please help! How can I achieve it? I tried formula field but unable to get. I tried through trigger but it is not working nighter on new task nor while I update the task.
Please find below code:
trigger updatefunctionalrole on Task (before insert, before update) {

Map<ID,String> confunrole = new Map<ID,String>();
List<Task> conTasks = new List<Task>();


for (Task e : trigger.new) {

    if (e.whoID!= null && (String.valueOf(e.whoID)).startsWith('003'))  {

        if (trigger.isInsert || (trigger.isUpdate && e.WhoID != trigger.oldMap.get(e.id).WhoID)) {
            confunrole.put(e.whoID,'');
            conTasks.add(e);
        }
    }
}

for (contact con : [SELECT Functional_Role__c FROM contact WHERE ID IN :confunrole.keySet()]) {
    confunrole.put(con.id,con.Functional_Role__c);
}
// Update the contact functional role field on the Task with the relevant value
for (Task e : trigger.new) {
    e.functional_role__c = confunrole.get(e.whoID);
}
}
Kindly let me me know where I am doing wrong.
 
Russell baker 1Russell baker 1
Getting error in Devloper console
Execute Anonymous Error                                                 
Line: 1, Column: 0
required (...)+ loop did not match anything at input 'trigger'
Russell baker 1Russell baker 1
Any Please help me to figure out the issue!