Regarding Triggers

Question

How to update the records in after insert and before update trigger at same time with same field, actually I am struck with the code

trigger PopulateTrigger1 on Contact (before insert,before Update,after insert) {


    if(Trigger.isinsert){
     For(Contact c:Trigger.New){
         if(Trigger.isbefore){
             C.Description='ela';
             C.Department=C.LastName;
            }

            if(Trigger.isafter){
            contact cf=new contact(id=c.id);
            cf.LastName='some bla';
            cf.Description='Having a value';
            cf.Department='one more value';
            update cf;

             }
        }
    }
    else
    {        
    for(contact ce:trigger.new)
        {
            if(Trigger.isbefore){

                ce.phone='123450';
                Ce.Description=ce.FirstName+' '+ce.Phone;
                Ce.Department=Ce.LastName;
                }
            }
            }    
}

While using after insert trigger , before update event is also occurring. Please anyone guide me for the answer.

Answer 1

I really don't understand your business requirement for doing an update in after insert and suppress update events in trigger, you need to use static variables to do that.

Apex Class:

public class TriggerRecursionStopper {
    public static Boolean isUpdateStopper = False;
}

Trigger:

trigger PopulateTrigger1 on Contact (before insert,before Update,after insert) {           
    if(Trigger.isinsert){
        For(Contact c:Trigger.New){
            if(Trigger.isbefore){
                C.Description='ela';
                C.Department=C.LastName;
            }                  
            if(Trigger.isafter){
                contact cf=new contact(id=c.id);
                cf.LastName='some bla';
                cf.Description='Having a value';
                cf.Department='one more value';
                TriggerRecursionStopper.isUpdateStopper = True; // This will set the static boolean variable to True
                update cf;                              
            }
        }
    }
    else
    {        
        for(contact ce:trigger.new)
        {
            if(Trigger.isbefore){
                if(!TriggerRecursionStopper.isUpdateStopper){ // Check if the static boolean variable is true, if yes skip this, else run this
                    ce.phone='123450';
                    Ce.Description=ce.FirstName+' '+ce.Phone;
                    Ce.Department=Ce.LastName;
                }
            }
        }
    }    
}

Hope it helps.

Answer 2

--> First you have to create the following class in your org :

public class checkRecursive {
private static boolean run = true;
    public static boolean runOnce(){
    if(run){
     run=false;
     return true;
    }else{
        return run;
    }
    }
}

--> Now use this class in your org as :

trigger contchange on Contact (before insert,before update,after insert) {
   List<Contact> conList=new List<Contact>();
    Set<Id> set1 = new Set<Id>();
    if(Trigger.isbefore){
        if(checkRecursive.runOnce()) {
        For(Contact c:Trigger.New){
            if(Trigger.isInsert){
                C.Description=c.FirstName;
                C.Department=C.LastName;
            }
            if(Trigger.isUpdate){
                c.phone='123450';
                C.Description=c.FirstName+' '+c.Phone;
                C.Department=C.LastName;
            }
        }
        }
    }
     else    
     {
         for(contact ce:trigger.new)
         {
            contact cf=new contact(id=ce.id);
            cf.LastName='some bla';
            cf.Description='Having a value';
            cf.Department='one more value';
            update cf;
         }
     }

}

Regards,

Ajay