In my test class i have the creation of a dummy custom setting and a dummy lead:

Group g1 = new Group(Name='group name', type='Queue');

            insert g1;
            QueuesObject q1 = new QueueSObject(QueueID = g1.id, SobjectType = 'Lead');

            insert q1;

    SetOwner__c mycs = SetOwner__c.getValues('standardset'); 
             if(mycs == null) {             
                 mycs = new SetOwner__c(Name= 'CustomValues');
                 mycs.OwnerId__c ='00520000000z3PrAAI';
                 insert mycs;

    Lead lead = createNewLead(u2.id);          
                insert lead;


MIXED_DML_OPERATION, DML operation on setup object is not permitted after you have updated a non-setup object (or vice versa): SetOwner__c, original object: QueueSobject: []

I get this error because i am trying to perform DML on setup and non-setup objects in the same transaction.

Any solution for this problem?

1 Answer 1


You can resolve this in your test class by using System.runAs.

System.runAs ( new User(Id = UserInfo.getUserId()) ) {
    ...your setup-object DML...

If you need to do this in a non test scenario @future, Batch Apex, apex:actionFunction or something as simple as user button flow, it can be used to separate the transactions. The Salesforce documentation goes into the non test scenario a little further. This Database.com variant (equally applicable to Force.com) on the same help topic goes into the testing use case further.

  • Your most welcome! :-) Commented Jun 27, 2013 at 13:17
  • 1
    Hey @ca_peterson, thanks for the tweak nice optimisation! Not sure where I first heard about it tbh, though I did actually find this pattern well covered in several blogs forums and sf docs as I was checking my understanding of it. Commented Jun 27, 2013 at 23:42
  • 1
    Hope you don't mind, I edited your answer to create the User sobject in memory instead of from the database - helps avoid an extra query. Commented Jun 27, 2013 at 23:45
  • interestingly works for permission set test Mixed DML operation issues also, thanks!
    – realnumber
    Commented Apr 8, 2014 at 17:02
  • Yeah spookly, i had just used this in some code i wrote when your upvote came through! :-) Commented Apr 9, 2014 at 2:13

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