System.UnexpectedException: INACTIVE_OWNER_OR_USER: owner or user is inactive

Question

I have below trigger that needs to activate the User as well as generate reset password link for the same when a custom checkbox field is checked. Below is my apex trigger code that throws this error on an inactive user's detail page as I try to Save the checkbox checked. Basically making Isactive field of User as checked through trigger is not happening. Can someone please help.

Apex Trigger:

trigger TrainingCompleted on User (before update) {
    for (User updated : Trigger.new) {
        if(updated.Training_Complete_abv__c = true)
        {   updated.IsActive =true;
           if( updated.IsActive =true)
            System.resetPassword(updated.Id,true);// error line

        }
    }
}

Error:

 execution of BeforeUpdate caused by: System.UnexpectedException: INACTIVE_OWNER_OR_USER: owner or user is inactive. Org Id:00D8A0000008i2Q User Id:005F0000003mdWV: Trigger.TrainingCompleted: 

Answer 1

Its because you are trying to reset the password in before update context when the user is still Inactive.

Try to reset the password in after update. That should work I guess.

EDIT

Have not tested the code. Just wrote it on the fly. So might have issues, but should get you started.

trigger TrainingCompleted on User (before update, after update) {
    for (User updated : Trigger.new) {
    if(Trigger.isBefore){
            if(updated.Training_Complete_abv__c = true){   
           updated.IsActive =true;
        }
    }
    else if(Trigger.isAfter){
           if(!Trigger.oldMap.get(updated.id).isActive && Trigger.newMap.get(updated.id).isActive)
            System.resetPassword(updated.Id,true);
    }

    }
}