Hi,

I need help on building a trigger to add the line items automatically based on a field, where the number is mentioned. As per that number the line items is created automatically. Please find the code for reference which I am working on:

trigger OpportunityProductInsert on Opportunity (after insert, after update){

                //USE DESCRIBE METHODS INSTEAD OF SOQL TO GET RECORDTYPEIDS. HELPS IN REDUCING DMLS

    Schema.DescribeSObjectResult d = Schema.SObjectType.Opportunity;

    Map<String,Schema.RecordTypeInfo> rtMapByName = d.getRecordTypeInfosByName();

    Id oppRTID = rtMapByName.get('Insert Opp RecordTypeName Here').getRecordTypeId();

//USE MAPS AND LIST TO HOLD DATA

Map<Id,String> currencyisocodemap = new Map<Id, String>();                

    for(Opportunity o :Trigger.new){

                if(o.CurrencyISOCode!=null){

                                currencyisocode.put(o.id, o.CurrencyISOCode);

                }

    }

//USE RELATIONSHIP QUERIES TO REDUCE SOQLS

List<PricebookEntry> pbe = [select Id, CurrencyISOCode from PriceBookEntry where CurrencyISOCode in :currencysiocodemap.keyset() and Pricebook2.isActive = true];

Map<String,String> isomap = new Map<String, String>();

for(PricebookEntry p  :pbe){

                isomap.put(p.CurrencyISOCode. p.Id);

}

List<OpportunityLineItem> oppline = new List<OpportunityLineItem>();

    for(Opportunity o :Trigger.new){

                //USE LISTS TO HOLD RECORDS BEFORE DOING 'BULK' INSERT

                If(o.N__c>0 && o.RecordTypeId==OppRTId){

                                oppLine.add(new OpportunityLineItem(OpportunityId = o.id, UnitPrice = 0, Quantity = 1, PricebookEntryId = isomap.get(o.CurrencyISOCode));

                }

    }

//INSERT OUTSIDE FOR LOOP. BULK INSERT. REDUCE DMLS

if(oppline.size()!=0) insert oppline;

}