Trigger that inserts record from newly inserted record

Question

I've Updated my code, and I'm still not getting the additional records inserted. My goal is; once an opportunity is closed a project is created. Once the project is created Credit Details (OpportunityLineItems) are added to the project. Any help on why I'm not getting this to happen is definitely appreciated. I've posted the code below.

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

list<Project__c> lstProject = new List<Project__c>();
list<CreditDetail__c> lstCD = new List<CreditDetail__c>();
list<map<Date,CreditDetail__c>> lstmapCreditDetail = new List<map<Date,CreditDetail__c>>();


    list<Opportunity> lstOpp = [Select id, Accountid, CloseDate, StageName, Generate_Projects__c, RecordTypeId,(Select Id, ProductID__c,Jurisdiction__c,Quantity,ServiceDate From Opportunitylineitems) From Opportunity
                               ];

    for(opportunity opp : trigger.new){
        if(opp.Generate_Projects__c == true && opp.StageName =='7 - Closed Won' && opp.RecordTypeId == '012M00000004qsD') {
            lstProject.add(new Project__c(Opportunity__c = opp.Id, Project_Stage__c = '1 - Awaiting Start - Internal', Contract__c = opp.Contract__c, Account__c = opp.AccountId, Kickoff_Date__c = opp.CloseDate, Program_Type__c = 'Research & Development', Name = opp.name+'-'+'Research & Development'));

        }
    }

    insert lstProject;

**for (Integer i = 0; i < lstOpp.size(); i++) {
        lstmapCreditDetail.add(new map<Date,CreditDetail__c>());
        if (lstOpp[i].StageName == 'Closed Won' && lstOpp[i].RecordType.name == 'Corporate Sales' && lstOpp[i].Projects_Created__c == false && 
            lstOpp[i].Generate_Projects__c == true){

     for (integer j = 0; j < lstOpp[i].OpportunityLineItems.size(); j++){
                if (lstmapCreditDetail[i].get(lstOpp[i].OpportunityLineItems[j].ServiceDate) == null) {
                    lstmapCreditDetail[i].put(lstOpp[i].OpportunityLineItems[j].ServiceDate, 
                       new CreditDetail__c(Project__c =lstmapCreditDetail[i].get(lstOpp[i].OpportunityLineItems[j].ServiceDate).Id,
                                            Name = 'Test Credit Detail',
                                            Beneficiary__c = 'LLC',
                                            Jurisdiction__c = 'AL',
                                            Tax_Year__c = '2014'));
                }
     }
            }
}
insert lstCD;
}**

Answer 1

The act of inserting (via the insert DML operation) will place the generated id in all members of the list passed to insert.

Hence, lstproject will have the id(s) populated and ready for the next statement