[SalesForce] Error: Compile Error: Invalid bind expression type of OpportunityLineItem

i am getting this error in lin 12, how to pass multiple product code using list, can anyone please help me out.

Error–Error: Compile Error: Invalid bind expression type of OpportunityLineItem for column of type String at line 12 column 92 

public class Procuct_Adding_To_Order{

public static void productOrder(List<OpportunityLineItem> oli){ 

   set<Id> setOppId = new set<Id>(); 

   for(OpportunityLineItem obj: oli){ 
        setOppId.add(obj.OpportunityId); 
   } 

   List<OpportunityLineItem> ProdCode = [Select ProductCode from OpportunityLineItem where id IN: oli];
   List<Product2> Prod_Nam = [Select id,Product_Abb__c from Product2 where ProductCode IN: ProdCode];
   List<opportunity> needed = [Select Master_Opportunity__c from opportunity Where Opportunity.id =: setOppId];
   List<OrderItem> orderIt = new List<OrderItem>();

    for(Order ord: [Select id from Order where opportunityId =: needed[0].Master_Opportunity__c])
      {
       for(OpportunityLineItem o : oli)
       {  
        for(Product2 pr : Prod_Nam)
        {
        OrderItem op = new OrderItem(); 
        op.Opportunity_del__c = needed[0].Master_Opportunity__c; 
        op.orderId = ord.id;
        op.Order_Name__c = Pr.Product_Abb__c;
        op.PriceBookEntryId = o.PriceBookEntryId;
        op.Quantity = o.Quantity;
        op.UnitPrice = 100;
        orderIt.add(op);
         }
          } 
        }
    upsert orderIt; 
}
}

Best Answer

In your first SOQL, thou you are only querying for product codes, you will get back opportunity line item in the list.

List<OpportunityLineItem> ProdCode = [Select ProductCode from OpportunityLineItem where id IN: oli];

So, in your second SOQL you are passing OpportunityLineItem list instead of product codes.

List<Product2> Prod_Nam = [Select id,Product_Abb__c from Product2 where ProductCode IN: ProdCode];

to fix this, after your first query, iterate and store the product codes into a separate collection / array and use it in your second SOQL.

something like

List<String> ProdCodes = new List<String>();
List<OpportunityLineItem> olList = [Select ProductCode from OpportunityLineItem where id IN: oli];
for(OpportunityLineItem ol : olList){
    ProdCodes.add(ol.ProductCode);
}
List<Product2> Prod_Nam = [Select id,Product_Abb__c from Product2 where ProductCode IN: ProdCodes];
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