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Padmini S 26Padmini S 26 

Not able to Delete the record because of Apex Trigger

Hi ,

I have implemented the below code. But problem is when i am deleting the child record (Patient Record )then i am getting the error.

Validation Errors While Saving Record(s)
There were custom validation error(s) encountered while saving the affected record(s). The first validation error encountered was "Apex trigger UpdateDoctor caused an unexpected exception, contact your administrator: UpdateDoctor: execution of BeforeDelete caused by: System.NullPointerException: Attempt to de-reference a null object: Class.UpdatedoctorInfo.updatedoctor: line 10, column 1". 

Apex Class:
-----------------
public Class UpdatedoctorInfo
{
  public void updatedoctor (List<Patient__C> patients)
     {
     Map<String, Patient__C> patientcodeMap= new Map<String, Patient__C>();
     for(Patient__c p: patients)
        {
             if (p.Doctor_Code__C != Null )
            {
            patientcodeMap.put(p.Doctor_Code__C ,p);
            }
              }
     List<Doctor__C> doctorToUpdate= new List<Doctor__C>();
     List<Doctor__C> doctorList = new List<Doctor__C>([SELECT id,Doctor_Code__C  FROM Doctor__C WHERE Doctor_Code__C IN :patientcodeMap.KeySet()]);
     System.debug('***********' +doctorList);
     for(Doctor__C c: doctorList )
        {
            Patient__C obj = patientcodeMap.get(c.Doctor_Code__C );
             if(obj.Doctor__C == NULL)
            {
            system.debug('doctor id' +obj.Id);
            obj.Doctor__C = c.Id;
            }
          else
            {
              
            }
            doctorToUpdate.add(c);
            update doctorToUpdate;
        }
     Map<Id, Doctor__c> opportunityMap = new Map<Id, Doctor__c>();
         for (Patient__C ps : patients)
        {
            Doctor__c opp = new Doctor__c(Id = ps.Doctor__C);
            opp.Jan_Revenue_Value__c = 0;
            opp.Feb_Revenue__c = 0;
            opp.Mar_Revenue__c = 0;
            opp.May_Revenue__c = 0;
            opp.Apr_Revenue__c = 0;
            opp.Jun_Revenue__c = 0;
            opp.Jul_Revenue__c = 0;
            opp.Aug_Revenue__c = 0;
            opp.Sep_Revenue__c = 0;
            opp.Oct_Revenue__c = 0;
            opp.Nov_Revenue__c = 0;
            opp.Dec_Revenue__c = 0;
             opportunityMap.put(ps.Doctor__C, opp);
        }
         List<Patient__c> pat =  [select id,Doctor__C ,Patient_Revenue__c,CreatedDate from Patient__C where Doctor__C in :opportunityMap.keySet()];
         for (Patient__C ps : pat)
        {
            Doctor__c opp = opportunityMap.get(ps.Doctor__c);
            if(ps.CreatedDate.month() == 1)
             {
           if (ps.Patient_Revenue__c != null )
             {
              opp.Jan_Revenue_Value__c += ps.Patient_Revenue__c;
             }
             }
             if(ps.CreatedDate.month() == 2)
             {
           if (ps.Patient_Revenue__c != null )
             {
              opp.Feb_Revenue__c += ps.Patient_Revenue__c;
             }
             }
              if(ps.CreatedDate.month() == 3)
             {
           if (ps.Patient_Revenue__c != null )
             {
              opp.Mar_Revenue__c += ps.Patient_Revenue__c;
             }
             }
              if(ps.CreatedDate.month() == 4)
             {
            if (ps.Patient_Revenue__c != null )
             {
              opp.Apr_Revenue__c += ps.Patient_Revenue__c;
             }
             }
              if(ps.CreatedDate.month() == 5)
             {
          if (ps.Patient_Revenue__c != null )
             {
              opp.May_Revenue__c += ps.Patient_Revenue__c;
             }
             }
             if(ps.CreatedDate.month() == 6)
             {
           if (ps.Patient_Revenue__c != null )
             {
              opp.Jun_Revenue__c += ps.Patient_Revenue__c;
             }
             }
             if(ps.CreatedDate.month() == 7)
             {
            if (ps.Patient_Revenue__c != null )
             {
              opp.Jul_Revenue__c += ps.Patient_Revenue__c;
             }
             }
         if(ps.CreatedDate.month() == 8)
             {
         if (ps.Patient_Revenue__c != null )
             {
              opp.Aug_Revenue__c += ps.Patient_Revenue__c;
             }
             }
          if(ps.CreatedDate.month() == 9)
             {
          if (ps.Patient_Revenue__c != null )
             {
              opp.Sep_Revenue__c += ps.Patient_Revenue__c;
             }
             }
           if(ps.CreatedDate.month() == 10)
             {
           if (ps.Patient_Revenue__c != null )
             {
              opp.Oct_Revenue__c += ps.Patient_Revenue__c;
             }
             }
             if(ps.CreatedDate.month() == 11)
             {
             if (ps.Patient_Revenue__c != null )
             {
              opp.Nov_Revenue__c += ps.Patient_Revenue__c;
             }
             }
             if(ps.CreatedDate.month() == 12)
             {
              if (ps.Patient_Revenue__c != null )
             {
              opp.Dec_Revenue__c += ps.Patient_Revenue__c;
             }
             } }
  update opportunityMap.values();
   }}

Apex Trigger:
--------------------------
trigger UpdateDoctor  on Patient__c (before insert, before update, after insert, before delete,after update, after delete, after undelete ) {
    list<Patient__C> patients = trigger.new;
    UpdatedoctorInfo my = new UpdatedoctorInfo();
    my.updatedoctor(patients); }

Thanks for your help!
 
Best Answer chosen by Padmini S 26
Padmini S 26Padmini S 26
Hi Dillip,

Below code  works fine for me.

trigger UpdateDoctor  on Patient__c (before insert, before update, after insert, after update,after delete ) 
{
 if( Trigger.isInsert || Trigger.isUpdate)
    {
    list<Patient__C> patients = trigger.new;
    UpdatedoctorInfo my = new UpdatedoctorInfo();
    my.updatedoctor(patients); 
     }
  if(Trigger.isDelete)
    {
     Patient__c [] patients = Trigger.old;
     for(Patient__c oldObject :patients)    //assume deletion of more than 1 record
     {
        UpdatedoctorInfo my = new UpdatedoctorInfo();
        my.updatedoctor(patients);
     }
    }
}

Thank you for your help.
 

All Answers

dillip nayak 3dillip nayak 3
Hi Padmini,

The error you getting because of trigger execution its execute each time if any action occurs.

You need to define context type Example isUpdate/isInsert

trigger UpdateDoctor  on Patient__c (before insert, before update, after insert, before delete,after update, after delete, after undelete ) {
    if(trigger.isAfter && Trigger.IsUpdate)
    {
         UpdatedoctorInfo my = new UpdatedoctorInfo();
    my.updatedoctor(trigger.new);
    }
    
    }

I think its solve your problem.
Padmini S 26Padmini S 26
Hi Dillip,

Thank you for your reply.

I have tried with below code. Still getting the same error.

trigger UpdateDoctor  on Patient__c (before insert, before update, after insert, before delete,after update, after delete, after undelete ) 
{
 if (Trigger.isBefore)
    {
        if (Trigger.isInsert || Trigger.isUpdate || Trigger.isDelete){
           list<Patient__C> patients = trigger.new;
           UpdatedoctorInfo my = new UpdatedoctorInfo();
           my.updatedoctor(patients);
          } }
       if (Trigger.isAfter)
     {   
        if(trigger.isInsert || Trigger.IsUpdate || Trigger.isDelete)
        {
        list<Patient__C> patients = trigger.new;
         UpdatedoctorInfo my = new UpdatedoctorInfo();
         my.updatedoctor(patients);
        } } }

Thanks in Advance.
dillip nayak 3dillip nayak 3
Why Put IsDelete is there any action fire over delete action?

trigger UpdateDoctor  on Patient__c (before insert, before update, after insert, before delete,after update, after delete, after undelete ) 
{
 if (Trigger.isBefore)
    {
        if (Trigger.isInsert || Trigger.isUpdate){
           list<Patient__C> patients = trigger.new;
           UpdatedoctorInfo my = new UpdatedoctorInfo();
           my.updatedoctor(patients);
          } }
       if (Trigger.isAfter)
     {   
        if(trigger.isInsert || Trigger.IsUpdate)
        {
        list<Patient__C> patients = trigger.new;
         UpdatedoctorInfo my = new UpdatedoctorInfo();
         my.updatedoctor(patients);
        } } }

   Master Code

trigger AccountTrigger on Account (before insert,after insert,before update,after update,after delete,before delete,after undelete) {
    //Trigger.new//Trigger.NewMap
    if(trigger.isInsert && trigger.isBefore){
        set<string> accountName=new set<string>();
        for(account acc:trigger.new)
        {
            accountName.add(acc.name);
        }
        system.debug('Account Name'+accountName);
    }
    //Trigger.new//Trigger.NewMap
    else if(trigger.isInsert && trigger.isAfter)
    {
        system.debug('After Insert'); 
    }//trigger.new,Trigger.Old,Trigger.newmap
    else if(trigger.isUpdate && trigger.isBefore)
    {
        system.debug('before update');
        
    }//trigger.new,trigger.old,trigger.newmap
    else if(trigger.isUpdate && Trigger.isAfter)
    {
        system.debug('After Update');
    }//trigger.old,trigger.oldmap
    else if(trigger.isDelete && Trigger.isBefore)
    {
        system.debug('Before Delete');
        
    }//trigger.old,trigger.oldmap
    else if(trigger.isDelete && Trigger.isAfter)
    {
        system.debug('After Delete');
    }//trigger.new
    else if(trigger.isUndelete)
    {
        
    }
    
}
Padmini S 26Padmini S 26
Hi Dillip,

Actually my requirement is Doctor__C object contains the Jan_Revenue__c field. One Doctor__C record contains multiple Patient__c related records (Lookup Relationship). We have Revenue__c field on Patient__c record. Jan_Revenue__c field should populate with the sum of all Revenue__c field value of all child Patient__c records (Like Roll up Summary). It is not working in one scenario, that is when one child Patient__C record is deleted then sum is not populated with correct value.

 
dillip nayak 3dillip nayak 3
trigger UpdateDoctor on Patient__c (after insert,after update,after delete) {

    list<Doctor__c> doctorList=new     list<Doctor__c>();
    Doctor__c doctorObj=new Doctor__c();
    if(trigger.isinsert && trigger.isafter)
    {
        
        for(Patient__c Patientobj:[select id,name,Revenue__c,Doctor_Name__c,Doctor_Name__r.Jan_Revenue__c from Patient__c where id=:trigger.newMap.keySet()])
        {
            doctorObj.id=Patientobj.Doctor_Name__c;
             //doctorObj.Jan_Revenue__c=Patientobj.Doctor_Name__r.Jan_Revenue__c+Patientobj.Revenue__c;
            doctorList.add(doctorObj);
        }
        
    }else if(trigger.isupdate && trigger.isafter)
    {
        for(Patient__c Patientobj:[select id,name,Revenue__c,Doctor_Name__c,Doctor_Name__r.Jan_Revenue__c from Patient__c where id=:trigger.newMap.keySet()])
        {
             doctorObj.id=Patientobj.Doctor_Name__c;
             //doctorObj.Jan_Revenue__c=Patientobj.Doctor_Name__r.Jan_Revenue__c+Patientobj.Revenue__c;
             doctorList.add(doctorObj);
        }
    }
    else if(trigger.isdelete && trigger.isafter)
    {
        for(Patient__c Patientobj:[select id,name,Revenue__c,Doctor_Name__c,Doctor_Name__r.Jan_Revenue__c from Patient__c where id=:trigger.oldmap.keySet()])
        {
             doctorObj.id=Patientobj.Doctor_Name__c;
             //doctorObj.Jan_Revenue__c=Patientobj.Doctor_Name__r.Jan_Revenue__c-Patientobj.Revenue__c;
             doctorList.add(doctorObj);
        }
    }
    if(doctorList.size()>0)
    update doctorList;
}

:trigger.oldmap.keySet() will Solve your error
Padmini S 26Padmini S 26
Hi Dillip,

Below code  works fine for me.

trigger UpdateDoctor  on Patient__c (before insert, before update, after insert, after update,after delete ) 
{
 if( Trigger.isInsert || Trigger.isUpdate)
    {
    list<Patient__C> patients = trigger.new;
    UpdatedoctorInfo my = new UpdatedoctorInfo();
    my.updatedoctor(patients); 
     }
  if(Trigger.isDelete)
    {
     Patient__c [] patients = Trigger.old;
     for(Patient__c oldObject :patients)    //assume deletion of more than 1 record
     {
        UpdatedoctorInfo my = new UpdatedoctorInfo();
        my.updatedoctor(patients);
     }
    }
}

Thank you for your help.
 
This was selected as the best answer