to get id in the place of index number in for loop

Question

I have a method on which I'm running loop for showing all records of particular user(account). I'm getting index number in result. I want to show id of user instead of index number.

 public static void methodEventData2(){
    try {

        Map<id,list<event>> UserEvent2 = new Map<id,list<event>>();
        List<event> tempEventList = null;

        List<Event> newEvents = [Select Id, Subject, WhatId, WhoId, Who.Name, EndDate, EndDateTime,Start_Date_Time__c, OwnerId, 
            ActivityDate, ActivityDateTime, Facilities__c,Facilities__r.Name, Services__c, Appointment_Status__c, Description, 
            DC_Session_End_Time__c,DC_Session_Last_Start_Time__c,DC_Session_Run_Time__c,DC_Session_Start_Time__c,
            DC_Session_Status__c, End_Time__c, IsRecurrence, Sup_Provider__c, DOSSession__c, What.Name,Owner.Name From Event WHERE 
             whoid != null order by OwnerId limit 200];

            
            for(event et : newEvents){
            if(!UserEvent2.isEmpty() || UserEvent2 !=null){
                if(UserEvent2.get(et.OwnerId) != null){
                    tempEventList.add(et);
                    UserEvent2.put(et.OwnerId, tempEventList);
                }
                else{
                    tempEventList = new List<event>();
                    tempEventList.add(et);
                    UserEvent2.put(et.OwnerId, tempEventList);
                }
            }
         }



        Set<Id> keySet = UserEvent2.keySet();



        String body='{';
        Http http = new Http();
        HttpRequest request = new HttpRequest();
        request.setEndpoint('https://test/Appointments.json');
        request.setMethod('PATCH');
        
        for(id ownerId : keySet)
        {
            body=body+'"'+Ownerid+'" :'+JSON.serialize(UserEvent2.get(ownerId))+',';
        }
        body=body.removeEnd(',');
        body=body+'}';
        request.setBody(body);
        HttpResponse response = http.send(request);

when I'm writing tempEventList.add(et.OwnerId), it's showing error. Can anyone please guide as to how I can print ownerId in result instead of index number (0,1,2..) This issue was fixed by changing my code to -

  for(Id ownerId: UserEvent2.keySet()){
                body=body+'"'+ownerId+'" : {';
                for(Event e: UserEvent2.get(ownerId)){
                    body=body+'"'+e.Id+'" :'+JSON.serialize(e)+',';
                   
                }
                body=body.removeEnd(',');
                body=body+'},';
            }

Answer 1

Since your data structure is holding event records, your final JSON looks something like:

{
  "005...": [
   { "Subject": "Event 1", ... }
   { "Subject": "Event 2", ... }
  ],
  "005...": [
    { ... }
  ]
]

Your tool is showing the index, because each element is an event record; if you use the expand arrow next to an index, you'll see all the fields and their data.

The Id of the user is the key, shown as 0051D00000AMkwjQAD in your screenshot. Each entry below is an event owned by that user. In other words, the index shown is just the tool's way of saying that you have an array of objects, and for each object, there are more data values. You can expand one of those indexes to see the data there.

---

By the way, you'd get the same JSON output without the strange for loop by just serializing the entire map.

String body='{';
...
for(id ownerId : keySet)
{
    body=body+'"'+Ownerid+'" :'+JSON.serialize(UserEvent2.get(ownerId))+',';
}
body=body.removeEnd(',');
body=body+'}';

Can be written as:

body = JSON.serialize(UserEvent2);

---

List<event> tempEventList = null;

Variables are null by default, so you can just write:

List<event> tempEventList;