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MMA_FORCEMMA_FORCE 

Trigger Help please

I have a field named Total Students... and trying to do a count() on the object but can not get it to work...

It keeps bringing up this error:

Error: Invalid Data.
Review all error messages below to correct your data.
Apex trigger TTLs caused an unexpected exception, contact your administrator: TTLs: execution of AfterUpdate caused by: System.Exception: Record is read-only: Trigger.TTLs: line 7, column 9

 

trigger TTLs on Account (after update) {
    List<Account> udte = new List<Account>(); 
Integer accs;
accs=[Select count() from Account where RecordType.Name='Student'];
    for(Account hr: trigger.old)
    {
        hr.Total_Students__c=accs;
        htoUpdte.add(hr);
    }
    
}
 Yes I check the field level security, everything is editable about this field...
Where am I going wrong...
 
 
 


TheReportDoctorTheReportDoctor
The trigger.old is read-only.  You are trying to set a value to the old trigger.


minku1986minku1986
did anybody find a solution to this problem?


minku1986minku1986

    
    I am trying to add some data to a field.
    
    But it gives me this error...
    
    Apex trigger handleProjectManagerLookup caused an unexpected exception, contact your administrator: handleProjectManagerLookup: execution of AfterUpdate caused by: System.Exception: Record is read-only: Trigger.handleProjectManagerLookup: line 7, column 6
Message Edited by minku1986 on  03-03-2010 06:52 PM


krish_krish_
I think the below code will work.
 
 
trigger handleProjectManagerLookup1 on Timesheet__c (after insert) {
for(Timesheet__c objTimesheet:Trigger.New) {
List<TimeEntry__c> TE = [Select  t.Time__c, t.Notes__c From TimeEntry__c t WHERE t.Time__c = 23.00];

for (TimeEntry__c temp : TE){
     temp.Notes__c = 'Meenakshi';
        }
  
  update TE;
} 
}
 
 
 


minku1986minku1986
When I try to create a new timesheet record it still gives errors:
 
 Apex trigger handleProjectManagerLookup1 caused an unexpected
exception, contact your administrator: handleProjectManagerLookup1:
execution of AfterInsert
caused by: System.DmlException: Update failed. First exception on row 0
with id a08A0000000r3A0IAI; first error:
CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, handleProjectManagerLookup:
execution of AfterUpdate
caused by: System.Exception: Record is read-only
Trigger.handleProjectManagerLookup: line 7, column 6: []:
Trigger.handleProjectManagerLookup1: line 9, column 3
 
 
Whereas trying to create a new timeentry record gives the same old Record is readonly error  
  
 
 
 


krish_krish_
check the Timesheet list size
If the size() > 1 then update the object.