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I am having trouble in upserting a List. sObject may be Task or Account

public static void onTaskStatusChange(List<Task> newList, Map<Id, Task> oldMap) {
        List<SObject> objectUpsertList = new List<SObject>();

        for(Task newTask : newList) {
            Task oldTask = null;

            if(oldMap != null && oldMap.get(newTask.Id) != null) {
                oldTask = oldMap.get(newTask.Id);

            objectUpsertList = HelperClass.maintainTasks(newTask, oldTask);

            if(objectUpsertList.isEmpty()) {

        if(!objectUpsertList.isEmpty()) {
            upsert objectUpsertList;

I am having error, while wriitting Test Method for this.

System.DmlException: Update failed. First exception on row 0 with id 00Tc000000CIr9iEAD; first error: CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, Task_AfterUpdate: execution of AfterUpdate

caused by: System.TypeException: DML on generic List only allowed for insert, update or delete

Is there any work around for this?

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check out this blog ( translate it to english) www30304u.sakura.ne.jp/blog/?p=1407 –  rao Sep 2 '14 at 18:21

3 Answers 3

Use strictly insert or update. It's easy to found out which you should do since if there is an Id on the record it will always be update and the other way around for insert. You can even use 2 separate lists for this. 1 for update and 1 for insert. Just do a check for them.

List<SObject> updObjs = new List<SObject>();
List<SObject> insObjs = new List<SOBject>();
for (.... ...: ....)
  if (something.Id != null)
insert insObjs;
update updObjs;
share|improve this answer
 sObject sObj = Schema.getGlobalDescribe().get('Account').newSObject();

 sObj.put('name' , 'test');

 Account ResultFinal=(Account )sObj;

 upsert ResultFinal opt_external_id;
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can you add more details to your answer rather than just the code to help how it addresses the question –  Vamsi Krishna Mar 25 at 23:44

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